NB/T 10528-2021Technical specification for census of goaf area in coal mine (English PDF)
煤矿老空区普查技术规范
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Issued by
NEA
Level / Type
Industry · Recommended
Issue date
January 7, 2021
Implementation date
April 1, 2021
Scope
NB/T 10528-2021 is the English-translated version of 煤矿老空区普查技术规范.
NB/T 10528-2021 is the Chinese energy industry specification for surveying old goaf areas left by coal mining, including abandoned small pits and wells.
It classifies the basic types of old goaf, the complexity of survey conditions and the survey levels, then gives requirements for remote sensing interpretation, ground survey and mapping, and geophysical exploration by electrical, seismic, radioactive, high-precision gravity and cross-hole CT methods.
Drilling verification, evaluation of water accumulated in old workings with calculation of its volume, gas disposal and the final results report are also covered, with annexes on method selection and typical geophysical anomalies.
Coal mining enterprises use it for disaster prevention and government bodies for land planning. It was issued on 7 January 2021 and has applied since 1 April 2021.
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Document preview — NB/T 10528-2021
National Standard of the People's Republic of China
- Classification
- D 00;D09
Issued by: National Energy Administration of the People's Republic of China
Contents
- Preface
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 General
- 4.1 Purpose Task
- 4.2 Basic types of old empty areas
- 4.3 Census Condition Complexity Type
- 4.4 Census level requirements
- 4.5 Principles of census work arrangement and engineering quantity
- 4.6 Workflow
- 5 Remote sensing interpretation
- 5.1 Interpretation Principle
- 5.2 Interpretation signs of surface features in old empty areas
- 5.3 Submitting Results
- 6 Ground Survey and Mapping
- 6.1 Purpose Task
- 6.2 Layout principle
- 6.3 Survey content
- 6.4 Submitting results
- 7 Geophysical Exploration
- 7.1 Purpose Task
- 7.2 Principles of work arrangement
- 7.3 Electrical prospecting
- 7.4 Seismic exploration
- 7.5 Radioactive prospecting
- 7.6 High-precision gravity exploration
- 7.7 Interwell CT method
- 7.8 Submitting Results
- 8 Drilling Verification
- 8.1 Purpose Task
- 8.2 Layout principles
- 8.3 Technical requirements
- 8.4 Submitting Results
- 9 Old empty water evaluation
- 9.1 Purpose Task
- 9.2 Sources of old empty water
- 9.3 Dynamic Monitoring
- 9.4 Calculation of accumulated water volume
- 9.5 Evaluation of water quality of old empty water
- 9.6 Disposal of old empty water
- 9.7 Gas disposal
- 10 Report on the census results of the old coal mine empty area
- 10.1 Written results report
- 10.2 Figure
- 10.3 Schedule
- 10.4 Annex
- Appendix A (Informative Appendix) Geophysical Exploration Method Selection
- Appendix B (Informative Appendix) Characteristics of Geophysical Anomalies in Old Coal Mine Empty Areas
- Appendix C (informative appendix) Calculation of accumulated water volume in old empty water
- Appendix D (informative appendix) Outline of the report on the census results of the old coal mine empty area27 Reference
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
1 Scope
This standard specifies the general principles of census work in old coal mines, remote sensing interpretation, ground survey and mapping, geophysical exploration, drilling verification, Basic requirements for old empty water evaluation and achievement report preparation.
This standard is applicable to the special census work of old empty areas for coal mining enterprise disaster prevention and government land planning.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB 3838 Environmental Quality Standard for Surface Water
GB/T 14848 Groundwater Quality Standard
DZ/T 0069 Geophysical Exploration Map Schema Legend and Color Standard
MT/T 898 Code for Coal Electricity Exploration
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Caving zone
The range of rock formations in which the overlying strata fractured and collapsed into the gob caused by coal mining.
[Detailed rules for water prevention and control in coal mines (Notice of the State Coal Mine Safety Supervision Bureau on Printing and Distributing the "Detailed Rules for Water Prevention and Control in Coal Mine", Coal Safety Supervision Investigation [2018] 14 No.) Chapter VIII Supplementary Provisions, Article 137].
3.2 Water-conducting fractured zone
The rock strata within a certain range above the coal seam have collapsed and fractured, resulting in a cracked and water-conducting rock stratum range.
3.3 Bending subsidence zone
The strata above the water-conducting fracture zone create a range of curved subsidence.
3.4 Gob
Space that is no longer maintained after coal mining.
3.5 Old small coal pit
Small coal mine goaf with long mining history and missing data.
3.6 Old goaf area
The general term for goafs, small kilns and abandoned wells.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 29 pages — is available in the English PDF.
Referenced standards
Normative references
MT/T 898
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Related Standards
GB 3838-2002 — Environmental quality standards for surface water
GB/T 14848-2017 — Standard for groundwater quality
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NB/T 10528-2021
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