GB/T 37807-2019Technical specification for underground goaf survey of open-pit coal mine (English PDF)
露天煤矿井采采空区勘查技术规范
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
August 30, 2019
Implementation date
March 1, 2020
Scope
GB/T 37807-2019 is the English-translated version of 露天煤矿井采采空区勘查技术规范.
GB/T 37807-2019 is the Chinese standard "Technical specification for underground goaf survey of open-pit coal mine". Its scope clause reads: This standard stipulates the terms and definitions, general requirements, exploration work content and methods, investigation and measurement of open pit coal mining and mining.
Painting, geophysical exploration, drilling and sampling, and preparation of exploration results. This standard is applicable to the exploration of well mining goaf that affects the exploitation of open pit mines.
Caves and subsidence columns that affect the exploitation of open pit mines For the exploration of qualitative anomalies, refer to this standard. Its clauses include terms and definitions.
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Document preview — GB/T 37807-2019
National Standard of the People's Republic of China
- ICS
- 73.100.99
- Classification
- D 20
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 General requirements
- 5 Well mining and goaf exploration work
- 6 Well mining and goaf investigation and surveying
- 7 Well mining goaf geophysical exploration
- 8 Well mining and drilling area drilling and sampling
- 9 Well mining and goaf exploration results
- Appendix A (informative appendix) Method for estimating the ultimate safety thickness of well goaf
1 Scope
This standard stipulates the terms and definitions, general requirements, exploration work content and methods, investigation and measurement of open pit coal mining and mining.
Painting, geophysical exploration, drilling and sampling, and preparation of exploration results.
This standard is applicable to the exploration of well mining goaf that affects the exploitation of open pit mines. Caves and subsidence columns that affect the exploitation of open pit mines
For the exploration of qualitative anomalies, refer to this standard.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB 50021 Geotechnical Investigation Specification
GB/T 50123 Geotechnical Test Method Standard
GB/T 50266 engineering rock mass test method standard
GB 50585 Geotechnical Investigation Safety Specification
GB 51044 Specification for geotechnical investigation of coal mine goaf
MT/T 898 Coal Electricity Exploration Specification
Specification for coal pillars and coal mining in buildings, water bodies, railways and main shafts (Anzheng General Coal Pack [2017] No. 66)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Open pit coal mine mining goaf undergroundgoafinopen-pitcoalmine
Existing wells and mined areas that affect open-pit coal mining. After the coal seam is mined by the underground mining method, the overburden falls to the surface.
The area and scope of the boundary between the boundary of the final subsidence area and the boundary of the floor of the mined-out goaf, including the pillar-type mining, the overburden does not collapse.
Or if there is a collapse, there is still an area where the well is mined.
3.2 Overburden damage "three belts"
After the mining of the ore layer, the failure of the overlying strata in the vertical direction can be divided into the fall zone, the fault zone and the bending zone.
3.3 Geophysical exploration
Using the principles of geophysics, according to the differences in physical properties such as density, magnetic properties, electrical properties, elasticity, and radioactivity between various rocks,
Different physical methods and geophysical instruments to measure changes in the geophysical field of the engineering area to understand its hydrogeological and engineering geological conditions
Exploration and testing methods.
3.4 Core take rate corerecoverypercent
The ratio of the length of the core taken to the corresponding actual drilling footage.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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