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Quality Standard of Drill for Coal Geology Exploration
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MT/T 1042-2007: PDF in English (MTT 1042-2007) MT/T 1042-2007
COAL MINING INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 73.020
D 10
Record No.: 22178-2007
Quality Standard of Drill for Coal Geology Exploration
ISSUED ON: OCTOBER 22, 2007
IMPLEMENTED ON: JANUARY 01, 2008
Issued by: State Administration of Work Safety
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Standard Quality of Drilling Engineering ... 4
4 Quality Standard of Drill Logging... 8
5 Quality Standard of Drill Pumping Test ... 10
6 Drill Comprehensive Quality Standard ... 14
Appendix A (Informative) Major Data List of Drill of Coal Geological
Exploration ... 17
Appendix B (Informative) Quality Acceptance Manual of Drill of Coal
Geological Exploration ... 19
Quality Standard of Drill for Coal Geology Exploration
1 Scope
This Standard specifies the drilling, logging, comprehensive acceptance and pumping
test quality standards of drill for geological exploration of coal resources.
This Standard is applicable to quality requirements for design drill of geological
exploration of coal resources, quality acceptance of drill completion, and drill quality
assessment of exploration report.
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Standard, however, parties
who reach an agreement based on this Standard are encouraged to study if the latest
versions of these documents are applicable. For undated references, the latest edition
of the referenced document applies.
DZ/T 0215-2002 Specifications for Coal, Peat Exploration
DZ/T 0080-1993 Specifications for Geophysical Logging of Coal
3 Standard Quality of Drilling Engineering
3.1 Quality standard of drilling coal-seam
The quality of drilling coal-seam can be divided into 3 levels, such as high-quality,
qualified, and unqualified; the quality indicators of various levels can refer to Table 1.
Table 1 – Quality Indicators of Drilling Coal-seam
Item High-quality Qualified Unqualified
Thickness of
coal-seam
Satisfy one of the following conditions:
1. The sum of the missing coal-cores in the initial
coal (top) and final coal (bottom) is no more than
the following provisions:
Satisfy one of the following conditions:
1. The sum of the missing coal-cores in the initial
coal (top) and final coal (bottom) is no more than
the following provisions:
Unqualified
products
indicate those
products that
are not
qualified
True thickness of coal-
seam / m
Sum of missing
amount / m
True thickness of coal-
seam / m
Sum of missing
amount / m
c) Drill collapse, blockage, or sediment in it bury the thickness of the major water-
bearing-layer exceeding 1/5.
d) Q-S curve is abnormal; can’t be interpreted or utilized.
5.2 Quality standard of drill constant-flow unstable flow pumping test
The quality of drill constant-flow unstable flow pumping test can be divided into 4 levels,
such as high-quality, qualified, unqualified and abandoned.
5.2.1 Quality standard of high-quality, qualified and unqualified of drill constant-
flow unstable flow pumping test
The quality standard of high-quality, qualified and unqualified of drill stable flow
pumping test can refer to Table 6.
5.2.2 Other conditions
The high-quality and qualified levels of drill constant-flow unstable flow pumping test
shall also satisfy the following conditions:
a) The water stopping effect is checked to be qualified; the quality of washing hole
is reliable.
b) The sediment in the hole shall not bury 1/5 thickness of the major water-bearing-
layer.
c) The water samples shall be taken as per the sampling requirements.
d) The observations of the static water-level and restored water-level shall conform
to the provisions of the regulations.
e) The original data shall be recorded timely, correctly, tidy; the writing shall be clear,
correct, and unmodified.
5.2.3 Abandoned hole
It belongs to the abandoned hole once the quality of drill constant-flow unstable flow
pumping test is one of the following cases:
a) The water drawn from the drill penetrates into the hole in the vicinity of it, forming
a circulating water.
b) Sealing and water stopping fails; and there are not the effective flow logging data
for remedy.
c) Drill collapse, blockage, or sediment in it bury the thickness of the major water-
bearing-layer exceeding 1/5.
g) The completeness and rationality of the drawdown, time (distance) semi-
logarithm or logarithm curve of unstable flow pumping shall be audited according
to the pumping objectives and data interpretation.
h) In addition to as per the above requirements in Table 6, the other pumping quality
standard shall conform to the provisions of Regulation on Coal Resources
Geological Exploration Pumping Test.
i) When the buried depth of the water-level is greater than 150m, and water volume
is large. If the existing pumping equipment can’t meet the requirements of water-
level drop in Tables 5 and 6, the acceptance shall be conducted as per the
approved design comments.
6 Drill Comprehensive Quality Standard
6.1 Quality standard of drill comprehensive coal-seam
The quality of drill comprehensive coal-seam can be divided into 3 levels, such as high-
quality, qualified, and unqualified.
6.1.1 Quality standard of the high-quality layer of the drill comprehensive coal-
seam
Through the comparative study of the drilling and logging data, it belongs to the high-
quality coal-seam when meeting one of the following conditions:
a) The depth, thickness of coal-seam, coal-core mining and original records shall
satisfy the quality standard of high-quality layer of drilling coal-seam;
b) The quality of logging coal-seam shall satisfy the standard of high-quality layer;
the coal-core length mining rate and weight mining rate of the design sampling
coal-seam shall meet the requirements of drilling high-quality layer.
6.1.2 Quality standard of qualified layer of drill comprehensive coal-seam
Through the comparative study of the drilling and logging data, it belongs to the
comprehensive qualified coal-seam when meeting one of the following conditions:
a) The depth, thickness of coal-seam, coal-core mining and original records shall
satisfy the quality standard of qualified layer and above of drilling coal-seam;
b) The quality of logging coal-seam shall satisfy the standard of qualified layer; the
coal-core length mining rate and weight mining rate of the design sampling coal-
seam shall meet the requirements of drilling qualified layer.
6.1.3 Quality standard of unqualified layer of the drill comprehensive coal-seam
Appendix A
(Informative)
Major Data List of Drill of Coal Geological Exploration
A.1 Drilling and measuring notice
A.2 Drill specifications
A.3 Notice on modification of drill design
A.4 Notice on drill commencement
A.5 Report on original record shift of drilling (including record contents of
simple hydrological observation)
A.6 Drilling gauge measurement table
A.7 Advance notice on coal-finding in drill
A.8 Report on coal-mining in drill
A.9 Sampling instructions of drill rock-coal sample
A.10 Drill rock-core identification table (original and copy)
A.11 Notice on stopping drilling
A.12 Notice on drill logging
A.13 Original record table of drill yield logging
A.14 Result table of site interpretation of drill logging
A.15 Result table of drill slope-measuring
A.16 Result table of drill temperature-measuring
A.17 Drill sealing specifications
A.18 Drill sealing report
A.19 Result and quality rating table of drill coal-seam logging
A.20 Result table of logging interpretation of drill geological section
A.21 Result and quality rating table of drill coal-seam comprehensive use
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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