Code of practice for mine surveyors

 Surveying

duties directly linked to the MHSA
are measurements required for accident
scenes; monitoring
surveys for fluid
concentrations, slope stability, subsidence
and pillar over- or undermining; high-risk
and hazard plans; boundary verification;
mine plan updates; and correlating the
surface topography with the underground
surveys for each level of the mine. The
following requirements of Chapters 14 and 17
of the Regulations [5] necessitate specific
mine survey input:

 Chapter

14 is concerned with protection of
the surface and the workings, ingress of
water or other fluid material into workings
and risks, such as rock falls, subsidence,
cavities and collapse of surface structures at
mines. The role of the mine surveyor
includes the surveying, monitoring and
reporting of these risks to management;

 Chapter

17 of the Regulations deals with the
statutory duties of mine surveyors with
respect to the appointment of the competent
surveyor; general practice relating
to
accuracy and standards for field surveys,
map projection and survey systems,
processing of survey data and mapping at
mines; safety precautions, procedures and
reporting of risks requiring survey input;
detailed requirements for the compilation,
updating and submission of statutory mine
plans and departmental copies; and the
survey issues relating to mine closure.



All physical survey measurements that are taken
or observed in the workplace need to be
processed in one way or another. Most of the
measurements required for the survey function
on a mine require error propagation and
calculation of accurate coordinates and heights
in relation to the survey datum. Health and
safety survey measurements, such as monitoring
pillar over- or undermining, require additional
calculations, such as safety factors, extraction
factors and width-to-height ratios. Coordinates
and elevations are also the base data for further
processing of areas, volumes and mineral reserve
reconciliations.

 As

is the case with data processing, mapping
is normally done electronically using
specialised mapping software.
 The mapping duties include the updating of
statutory maps, other plans and sections as
required by the MHSA (e.g. mine rescue and
ventilation plans), the compilation of
reticulation plans, rehabilitation design
plans, infrastructure plans and check survey
plans.

 Mine

surveyors must also give input to the
compilation and implementation of COP
(Code of Practice). In this regard, they are
involved
with
the
installation
and
management of monitoring systems designed
to combat rock falls. Another COP which
requires survey input is that for the ingress
of water into mine workings.
 It is also standard practice to have a standalone survey COP with detailed operating
procedures to guide all survey duties on a
particular mine.



Another important duty is to observe the mine
plans for the identification of risks, such as
subsidence, collapse of surface buildings and
structures resulting from the removal of support,
and risks related to mining in the proximity of
other underground workings. To ensure that the
surveyor knows which parts of the mine to
monitor, the MHSA requires the employer to
notify the surveyor appointed as competent
person of all working mining faces, surface
structures affected by mining, workings being
abandoned and safety pillars that are being or
have been removed.

 In

addition to on-mine reporting protocols,
the Regulations (Chapter 23) include a
guideline document on the reporting of
accidents and dangerous occurrences. Other
statutes of relevance to mine surveyors
include separate guideline documents on the
compilation of COP.

A

further duty is the observation and
management of the mine boundary lines and
pillars. The mine surveyor must indicate
boundary pillars on the mine plan, follow
instructions from the mine manager and
communicate events on both sides of the
boundary line. When working faces approach
the boundary pillar, the surveyor must give
adequate warning and continuously monitor
the situation.

 The

mine surveyor also gives input to the
rehabilitation plan and has to investigate
community complaints registered at the
mine. Examples of such input and
investigation would include the survey of
ground movement in the form of cracks,
subsidence and sinkholes by establishing the
distance from the mine, correlating the
incident with the surface and underground
mine workings and establishing the scale of
the problem.

 49.

Duties and responsibilities of surveyors –
(1) The surveyor shall –
 (a)make
such
accurate
surveys
and
levellings, and prepare such plans and
sections and tracings thereof, as the
manager may direct or as may be required by
the Act or by the regulations or orders made
thereunder, and shall sign the plans, sections
and tracings and date his signature; and
 (b) be responsible for the accuracy of any
plan and section, or tracings thereof that has
been prepared and signed by him.

(2) The surveyor shall record in abound-paged
book kept for the purpose –
 (a) the full facts when workings of the mine have
approached to about 75 metres from the mine
boundary, or from disused or waterlogged
workings;
 (b) any doubts which may exists concerning the
accuracy of the plans and sections prepared
under these regulations; and
 (c) any other matter relating to the preparation
of the plans and sections that he may like to
bring to the notice of the manager.


 Every

entry in the book shall be signed and
dated by the surveyor and countersigned and
dated by the manager : 1[Provided that
where in any mine two or more surveyors are
employed, each of the surveyors shall make
the entries aforesaid in respect of the
workings in his jurisdiction or of the plans
and sections in his charge].
 (3) Nothing in sub-regulation (2) shall absolve
the owner, agent or manager of his
responsibility under the Act and under these
regulations or orders made thereunder.



As per the Coal mines regulations (CMR 1957) no
work in a higher seam or section can be done
over an area in a lower seam or section which
may collapse. Further as any two coal seams or
two sections within the same coal seam which
are within 9 m from each other are called as
contiguous seams/sections. In such contiguous
workings, the pillars in one seam or section are
vertically above or below the pillars in the other
seam or section, unless the strata is inclined at
an angle of more than 30 degrees from the
horizontal. The parting left between any two
such seams or section is not less than three
metres.



The working of contiguous seams is difficult in
nature due to the strata control problems like
collapse of parting and load transfer on to the
pillars. In the normal method of working in
contiguous seams the top seam/ section is
developed and depillaring completed and the
caved goaf area allowed to settle for some time
before commencing depillaring in the bottom
seam/section. There is no method to estimate
the condition of the caved strata and hence the
bottom seam or section extraction is generally
delayed.

 Problems

like excessive stresses over the
pillars in the bottom seam/section due to
the presence of left over stooks in the top
seam/section, accumulations of water
and/or gas. Chances of spontaneous
combustion in the upper seam/section are
also very common in this type of working.
The presence of thin partings adds to the
risk of mining in such multi seam/section
workings.





Several research studies were undertaken to deal
with the problems of multi seam/section mining in
India by CIMFR and other scientific agencies. Some of
the findings are:
Contiguous coal seams can be safely and
economically extracted by stabilizing the parting
between the seams through underpinning. The
practice was followed at Chirimiri area mine of the
state owned south eastern Coal fields. Use of grouted
steel ropes for support of the roof coal band
improved the safety of the overhanging strata span
and successfully applied for the depillaring of the
12.5 thick Zero seam. Installation of full columngrouted 6–6.5 m long rope dowels at a grid pattern of
1.2×1.2 m in the floor of the top section in the
development gallery, split and slices consolidated the
composite parting of nearly 6.2 m thickness.
Underpinning is shown in Figure 54.

Figure 54 Simultaneous depillaring with
underpinning and roof bolts
 In one case at RK-8 mine, The Singareni
Collieries Company Ltd, a state owned mining
company, simultaneous extraction of pillars was
done in three contiguous seams with a parting of
7-9 m and with seam thickness of about 2.5 m
with the technical assistance of a government
scientific agency, National Institute of Rock
mechanics, Kolar. The results showed no
significant influence of the abutment loading
even at the time of goaf settlement due to the
de-stressed zone created by the seam of the
above panel.


 Extraction

of thick seam (10.5 m) in a single
lift using Blasting gallery method in a
previously developed multi section; posed
problems of pillar collapse at GDK -8 incline
of The Singareni Collieries. The 10.5 m thick
seam was developed along the top section at
a height of 3.0 m. In order to extract the
entire seam using the blasting gallery
method the bottom section is required to be
developed.

 Special

permission from the Mining
inspectorate allowed the bottom section
to be developed in a staggered manner
without vertical superimposition of the
pillars. The results show that the
staggered method of development of
bottom section for under winning of roof
coal is effective for a thick coal seam
already developed along the roof horizon.



SUMMARY OF LIMITS OF ERROR
Plans
Plans on the 1/2,000 scale

50 centimetres



Plans on the 1/1,000 scale

25 centimetres



(i) Triangulation
Position of stations of the triangulation as determined
from initial and verification bases 1/5,000th of the
lines horizontal distance of local point of origin.
(ii) Traverses
Total angular error 30√n ( thirty x square root
n) seconds
Error of closure 1/3,000th of the horizontal length of
the traverse











Underground Surveys
 (i) Traverse closed polygonally
 Total angular error (20+X) √n seconds
 Error of closure l/2,500th the horizontal length of the
traverse
 (ii) Traverse not closed polygonally but closed upon
reference points
 Error of closure 1/1,500th of horizontal length of the
traverse
 (iii) Subsidiary Surveys
 Error of closure by plotting l/500th of horizontal length of
the traverse
 Difference of two or more determinations of any
subsidiary points 3 metres


Correlations
 By shaft wires
2 minutes of arc
 By magnetic observations
2 minutes of arc




By direct connection

11 minutes of arc Levels



Surface mine bench marks

2 cms. per km.

Inset bench marks
Two or more shaft
measurements of established inset bench mark
should agree within 1/5,000.
 Inbye bench marks
1/2,500th of the
inclined length of the leveling.
 Subsidiary points
50 centimetres.


 Use

of polyester film for original mine
plans—The original mine plans are required
to be prepared on mounted paper and
tracings on tracing cloth are prepared from
the original plans for various statutory
purposes.
 However, the non-availability of good quality
drawing paper mounted on cloth, in the
Indian market, through indigenous sources,
has been causing concern to the mining
industry in general.

 The

problem was discussed with Director,
Survey of India, Eastern Circle, Calcutta, who
opined that presently the best medium for
preparation and maintenance of plans is the
polyester tracing film (which is now being
manufactured by some Indian firms), which
has better dimensional stability than best of
the mounted paper.
 Use should, therefore, be made of polyester
tracing film of 125 micron gauge for
preparation of original mine plans and of
lesser gauge for tracings of various
statutory/other plans.



Joint Survey Plan—The plan kept under Clause
(d) of Reg. 59(1) of CMR 1957 shall also on every
occasion that the details required under Clause
(a) of Reg. 59(4) are brought up-to-date in
compliance with the provision of Reg. 58(3), be
signed by the surveyor and the manager of the
adjoining mine(s) having workings within 60
metres of the common boundary (or where the
boundary is in dispute, within 60 metres of the
boundary claimed by the owner of the mine
concerned) signifying the correctness of the
common boundary, or the disputed boundaries,
as the case may be, and of the position of the
workings in relation to one another.



Water Courses to be Re-surveyed— As in several
cases the course of jores, nallas and other water
courses has shifted to a considerable extent over
the past few years from the course shown on the
mine plans, it is necessary that every water
course is re-surveyed and correlated with the
workings belowground. Wherever any large
discrepancy is noticed from the known data, it
should be intimated to the J.D.M.S. The report
should be accompanied by necessary plans
explaining the change. If the re-survey indicates
that any new danger has arisen, this should also
be clearly indicated in the intimation aforesaid.

 Particulars

of dams to be shown on plans—
The depth to which the dams are cut into
the roof, floor and sides are important
dimensions. Similarly, the materials used
in the construction of a dam are also
important details. These should be
shown/indicated on the plan.

 Water

Danger Plan— The surface contour
lines and underground spot levels etc. and
the permanent bench-mark required to be
shown under Reg. 59(3) of CMR 1957 should
be shown on a separate tracing of the
underground workings of the mine, which
should be kept up-to-date as required under
Reg. 58(3)
 The plan, which may be called 'Water Danger
Plan', shall also show surface drainage
system of the mine.

Water Danger Plan : Measures to give warning
of danger of inundation—Attention is invited to
Circular No. 30 of 1969 regarding maintenance
of a separate Water Danger Plan at the mine.
This is to amplify that the plan to be so
maintained should show the following features
to serve the desired purpose of guarding
against danger of surface and underground
inundation—
 (i) the position of the workings below ground;
and every borehole and shaft (with depth),
including opening, cross-measure drift, goaf,
pumping station;
 (ii) the general direction and rate of dip of the
strata;












(iii) such sections of the seam as may be necessary to
show any substantial variation in the thickness or
character thereof and showing the working section;
(iv) the position of every dyke, fault and other
geological disturbance with the amount and direction
of throw;
(v) the position and reduced level of permanent
bench-mark;
(vi) spot levels taken in workings belowground at
easily identifiable points e.g.,
(a) along haulage roadways, at every roadway
junction except in roadways where tramming is done
by manual means in which case spot levels may be
shown at points not more than 150 metres apart;
(b) in the case of the headings which have been
discontinued either temporarily or permanently also
at the end of such headings;







(vii) every source of water such as river, stream,
watercourse, reservoir, water-logged opencast
workings on the surface, and also the outline of all
water-logged workings on the belowground lying
within 60 metres of any part of the workings
measured in any direction;
(viii) every reservoir, dam or other structure, either
above or belowground, constructed to withstand a
pressure of water or to control an inrush of water,
along with reference to its design and other details of
construction;
(ix) surface contour lines drawn at vertical intervals
not exceeding five metres (or ten metres in the case
of a mine where there are no workings belowground
or in case of mines situated in hilly terrain, such
other larger interval as the J.D.M.S. may permit by
an order in writing and subject to such conditions as
he may specify) over the whole area lying within 200
metres of any part of the workings;

(x) surface drainage system of the mine;
 (xi) the highest flood level of the area;
 (xii) warning lines to draw visual attention to
dangers of inundation arising out of (a) surface
water (b) unconsolidated strata, (c) water
bearing strata and (d) underground water.
 Note—The distance at which these warning
lines may be drawn from the source of danger
would vary depending upon the rate of
progress of workings in a mine and cannot,
therefore, be specifically indicated. This
distance should, however, be such as to enable
the management to take note of danger well in
advance so that necessary permission for
working within a statutorily restricted area
could be obtained well in time.


4.1 Responsibility—It is one of the important
statutory duties and responsibilities of
surveyors to record in a bound paged book 'the
full facts when workings of the mine have
approached to about 75 metres from the mine
boundary or from disused or waterlogged
working'. Besides this requirement it is
recommended that warning lines should be
drawn on plans to draw visual attention to
dangers of inundation arising out of—
 (i) Surface water
 (ii) Unconsolidated strata
 (iii) Water-bearing strata, and
 (iv) Underground water.


 4.1.2

The distance at which these warning
lines may be drawn from the source of
danger would vary depending upon the rate
of progress of workings in a mine, and cannot
therefore be specifically laid down, but this
distance should be such as to enable the
management to take note of the danger well
in advance so that necessary permission for
working within a statutorily restricted area
could be obtained.

 4.1.3

The following code of practice
requiring measures to be taken for giving
warning of danger of inundation are in
addition to and not in substitution for any
relevant provisions of the Coal Mines
Regulations, 1957 or any amendments
thereof.

4.2.1 Location of Bodies of Water—Every effort
shall be made to locate and to mark on the
underground plan, Manager's plan, Overman's
plan and on Water Danger plan, the limits of any
surface or underground body of water which
may constitute a danger within the boundary of
a mine or within a distance of 60 metres outside
the boundary.
 4.2.2
Water in Old Workings—Where old
workings exist which may constitute a danger, it
shall be assumed, for the purpose of marking
the above mentioned plans, that they contain
water until the contrary is proved.






4.2.3 Position of Old Workings—All possible steps
shall be taken to ensure that the outline of all old
workings, in the same seam or in any other seam
within 60 metres (being the shortest distance
measured on any direction whether horizontal,
vertical or inclined) thereof are shown correctly on
the underground plan, Manager's plan. Overman's
plan and Water Danger plan. Such outline shall be
endorsed with the name of seam, reduced level of
the water and the date on which such water level
was recorded.
All old plans shall be regarded with suspicion until
their accuracy has been verified, and every effort
shall be made to obtain all existing information about
old workings; if there is doubt about the position of
old workings, this fact shall be mentioned on the
plans.



4.2.4 Warning Line—In addition to showing the
outline of any body of water which may constitute a
danger, the above plans shall be marked with a green
line verged yellow to indicate that any advance
beyond that line will bring the workings within a
distance of 120 metres of the body of water or such
greater distance as may be fixed by the
management.



4.2.5 Large Cautionary Zones—If the size of the
cautionary zone is such that it covers the whole area
of the plan, and no warning line can be shown, the
words 'SURFACE WATER' or 'UNDERGROUND WATER'
whichever are applicable shall be printed in green
large type lettering across the plan, together with a
note of the depth and reduced level of the water
and its pressure if known.



4.2.6 Statutory Restriction Line—The underground
plan, manager's, overman's and water danger plans
shall also be marked with a green line verged green
at a distance of 60 metres (being the shortest
distance measured in any direction whether
horizontal, vertical or inclined) from the edge of any
body of water to indicate that any advance beyond
that line can only be made with the permission of
Chief Inspector of Mines.



4.2.7 Check Surveys—When approaching a body of
water likely to constitute a danger, check surveys
and levelings of the workings shall be carried out
when a point has been reached 120 metres, or such
greater distance as may be fixed by the
management, from the body of water. Wherever
possible, there shall be an independent check by a
surveyor other than the one normally making surveys
at the colliery.

 4.2.8

Undersea Workings and Water Bearing
Strata—The foregoing provisions shall not
apply to undersea workings ad water-bearing
strata which may constitute a danger. These
shall receive special consideration by the
management.
 4.2.9
Informing the Management—The
surveyor shall inform the manager in
writing, of all known facts when approach is
being made towards a water cautionary
zone. All reservations and doubts which may
exist concerning the accuracy of the plans
shall be fully explained.



'Unconsolidated surface deposits' includes moss, peat,
quicksand, and in addition, abandoned opencast
workings, sand, gravel, silt, mud and any other fluid
matter, other than water, lying above the rock head,
and likely to constitute a danger.



4.3.2 Making the Plans—When the geological maps of
the area or any investigation or local knowledge
indicates the existence of unconsolidated surface
deposits within the boundary of a mine or within 60
metres outside it, the limits and nature of such
deposits shall be marked on the geological plan,
underground plan, manager's plan, overman's plan &
water danger plan. The limits so marked shall be
endorsed in green large type lettering with the
words 'UNCONSOLIDATED DEPOSITS' together with a
note of their thickness.



4.3.3 Warning Line— In addition to showing the
outline of any body of unconsolidated surface
deposit as above, a warning line consisting of a green
line verged yellow, drawn in such a position as to
indicate that any advance beyond that line will bring
the workings within a distance of 120 metres, or ten
times the thickness of the seam worked (whichever is
the greater) of the unconsolidated surface deposits.



4.3.4 Large Cautionary Zone— If the whole area of
the plan is overlaid by unconsolidated deposits and
no warning line can be shown, the words
'UNCONSOLIDATED DEPOSITS' shall be printed in green
large type lettering across the plan and the thickness
of the deposit shall be shown.



4.3.5 Statutory Restriction Line—The underground,
manager's overman's, and water danger plans shall
also be marked with the green line verged green at a
distance of 60 metres (being the shortest distance in
any direction whether horizontal, vertical or
inclined) from the edge of unconsolidated surface
deposits to indicate that any advance beyond that
line can only be made with the permission of Chief
Inspector of Mines.



4.3.6 Informing the Management—The Surveyor shall
inform the manager in writing of the full facts when
approach is being made towards a cautionary zone
for unconsolidated deposits, and all reservations and
doubts which may exist concerning the accuracy of
the plans shall be fully explained.



Maintenance of off-set plans of workings beneath
surface features—Permissions under 105 and 126 of
Coal Mines Regulations, 1957 have been granted
for development of workings under different
surface features stipulating inter-alias the
dimensions of the galleries which may be driven.



The frequency and type of inspections to be made
beneath such surface features have been stipulated
in DGMS Circular No. 1 of 1960. It is observed (that
with the passage of time and spalling from the pillar
sides and some time due to robbing, the dimensions
of the galleries increase beyond the permitted limits
and the supporting pillars become less in size.



In view of the above managements are requested
to prepare and maintain off-set plans on a scale
having a representative factor of 500 : 1 in
respect of all existing workings beneath the
surface features and within a distance of 45
metres thereof in case of permissions granted
under Reg. 105 and within a distance of 15
metres thereof in case of permissions granted
under Reg. 126.



The job of completion of the off-set plans,
referred to above, shall be completed within one
year and the completion report shall be sent to
the concerned Director of Mines Safety of the
Region and the D.G.M.S.

 1.1

From DGMS/AMP/I
 (i) Two copies of the (printed) forms
obtainable from the Dy. Director-General of
the concerned Zone shall be submitted, duly
filled in along with the plans.
 (ii) Factual information about all the items in
the forms shall be furnished correctly and
fully.
 1.2 Plans and Sections :
 (1) Two copies of the plans/sections shall be
submitted on tracing cloth/ polyester tracing
film only.

(2) The plans/sections shall be true copies of the
original plans/sections, which are being
maintained at the mine under Reg. 59(1) (b) and
(c) and a certificate to this shall be incorporated
on both the sets of tracings. The plans shall,
however, show as given below :
 2.1 Reg. 58(1) :
 (a) (i) Name of owner :
 (ii) Name of mine :
 (iii) Purpose for which the plan/section is
prepared.
 (b) True north or magnetic meridian with date of
the latter :
 (c) A scale, at least 25 cms. long and suitably
sub-divided.




2.2 Conventions as per second schedule



2.3 Plans to be brought up-to-date before abandonment or
at the time of I discontinuance.



3.0 Reg. 59(1) (b):



(i) Position of workings, belowground.



(ii) Position of boreholes and shafts (with depth), incline
openings, cross-measure drifts, goaves, fire stoppings or
seals.



(iii) Every important surface feature within the boundaries
such as RIy., road, river, stream, water course, tank,
reservoir, opencast working and building which is within
200 mtrs of any parts of the working measured horizontally
and H.F.L. of river(s) and stream(s).



(iv) General direction and rate of dip of strata. (v) Sections
of the seam(s).



(vi) The position of every fault, dyke, and other geological
disturbances with amount of throw and direction.

 (vii)

(I) an abstract of all statutory
restrictions in respect of the working, if any,
with reference to the order imposing the
same.
 (II) end of the workings marked with dotted
lines and last date of survey.
 4.0 Reg. 56 (1) (c) : Vertical mine sections,
where average inclination exceeds 30
degrees from the horizontal.
 Reg. 59 (2) : Multi-section workings lying
within 9 mtrs. to be shown in different
colours on a combined plan separately.

 Reg.

59 (3) (a) : Surface contour lines at
vertical intervals, not exceeding 5 mtrs.
 Reg. 59 (3) (b) : Spot levels along all
important drivages and at the ends of the
headings.
 Reg. 59 (3) (c) : Bench mark on the surface in
relation to M.S.L.
 Reg. 59 (4) (a) (i) Settled and/or claimed
boundary of the mine.
 (ii) Up-to-date working of all the mines
situated within 60 mtrs from the boundary.

 5.0

Reg. 61 (1) : Distance and bearing of at
least one shaft or opening, in relation to
T.J.P. (Tri-junction-pillar) or any permanent
surface features.
 Underground spot levels at the end of all
workings.
 Position of water dam(s) with dimensions and
particulars of construction.
 6.0 Reg. 64 (2) : A certificate of correctness
of the plan (as printed in the original plan).

 Reg.

64 (3) : The tracing should bear the
index No. of the original plan, from which it
is traced and should be certified to be true
copy of the original plan by the surveyor and
countersigned by the Manager.
 7.0 If certain particulars as given above are
not shown in the plan due to its non
existence or non applicability, certificates to
this effect shall also be clearly given on the
body of the plans.



Submission of Abandoned Mine Plans under
Regulation 63 of MMR 1961— When any mine or
in case of a mine to which Reg. 142 applies, any
part thereof, is abandoned or the workings
thereof have been discontinued for a period
exceeding four months, the owner of the mine
must
submit,
within
30
days
of
abandonment/five months of discontinuance, to
the D.G.M.S. two copies of Abandoned Mine
Plans and sections. These are in fact, true copies
of up-to-date plan and section of the workings of
the mine or part, maintained under clauses (b),
(c) & (d) of Reg. 61(1), with additional
information regarding location of the mine.

To cut down procedural delays in processing and
recording the AMPs, managements are hereby
advised to submit these A.M. Plans to the Dy.
Director-General of Mines Safety of the
concerned Zone.
 From past experience it can be said that at times
the plans and sections submitted lack in vital
details which also raise doubts about their
accuracy.
 Consequently considerable time and energy has
to be spent to get the desired information. To
guard against such eventualities in future you
are advised to ensure that the plans being
submitted are verified for details as per the
check list given in the appendix.


 1.1

From DGMS/AMP/L
 (i) Two copies of the (printed) forms
obtainable from the Dy. Director General of
the concerned Zone/Director General,
Dhanbad shall be submitted, duly filled in,
along with plans;
 ii) Factual information about all the items in
the form shall be furnished correctly and
fully.
 (iii) The owner/agent/manager shall sign the
form with name and his designation.

 1.2

Plans & Sections :
 (1) Two copies of the plans/sections shall be
submitted on tracing cloth/ polyester tracing
film only.
 (2) The plans/sections shall be true copies of
the original plans/sections, which are being
maintained at the mine under Regulation
61(1) (b) (c) & (d) and certificate to this
effect shall be incorporated on both the sets
of tracings. The plans shall, however, show as
given below :

2.1 Reg. 60 (1)
 (a) (i) Name of owner :
 (ii) Name of Mine
 (iii) Purpose for which the plan/section is
prepared.
 (b) True north or magnetic meridian with date of
the latter :
 (c) A scale, at least 25 cms long and suitably subdivided.
 3.0 The plans to be brought up-to-date before
abandonment or at the time of
 discontinuance.


4.0 Reg. 61 (1) (b) :
 (i) Position of workings, belowground.
 (ii) Position of boreholes and shafts (with depth),
drive, cross- cut, winze, rise, excavation (Sloped
ground) and every tunnel and air passage
connected therewith.
 (iii) Pillars or blocks of minerals left for support
of surface features. (iv) Every important surface
feature within the boundaries such as Rly., road,
river, stream, water course, tank, reservoir,
opencast workings and building within 200 mtrs
of any part of the workings measured
horizontally.


 (v)

General strike of vein and mineral bed.
 (vi) The position of every fault, dyke, and
other geological disturbance with amount of
throw and direction.
 (vii)
(I) an abstract of all statutory
restrictions in respect of the workings, if any
with reference to the order for imposing the
same,
 (II) end of the workings marked with dotted
lines and last date of survey.







5.0 Reg. 61 (1) (c) : Transverse sections as per
requirement.
(d) : Vertical sections as per requirement.
(f) (vi) : Surface contour lines at vertical interval not
exceeding 5 mtrs.
(vii) (I) : the highest flood level.
(II) : bench mark on the surface in relation to M.S.L.



(2) : Multi-section workings lying within 10 mtrs. to
be shown in different colours on a combined plan.



(3) (a) (i) : Settled and/or claimed boundary of the
mines.
(ii) : Up-to-date workings of all the mines situated
within 60 mtrs. from the mine boundary



 6.0

Reg. 63 (1) (i) : Distance and bearing
of at least one shaft or opening, in relation
to T.J.P. or any other permanent surface
feature.
 (ii) : Underground spot levels at the end of
all workings.
 (iii) : Position of water dam(s) with
dimensions and particulars of construction.
 7.0

Reg. 66 (2) : A certificate of
correctness of the Plan (as printed in the
original plan).

 Reg.

66 (3) :
Every tracing should bear
the index No. of the original plan from
which it is traced and should be certified to
be true copy of the original plan by the
surveyor and countersigned by the
Manager.
 8.0 If certain particulars as given above are
not shown on the plan due to its non
existence or non applicability, certificates
to this effect shall also be clearly given on
the body of the plans.

Code of practice for mine surveyors

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Code of practice for mine surveyors