GB/T 37807-2019 English PDF

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GB/T 37807-2019: Technical specification for underground goaf survey of open-pit coal mine
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GB/T 37807-2019	279	Add to Cart	3 days	Technical specification for underground goaf survey of open-pit coal mine	Valid

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Basic data

Standard ID: GB/T 37807-2019 (GB/T37807-2019)
Description (Translated English): Technical specification for underground goaf survey of open-pit coal mine
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D20
Classification of International Standard: 73.100.99
Word Count Estimation: 14,163
Date of Issue: 2019-08-30
Date of Implementation: 2020-03-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 37807-2019: Technical specification for underground goaf survey of open-pit coal mine

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical specification for underground goaf survey of open-pit coal mine ICS 73.100.99 D20 National Standards of People's Republic of China Technical specification for exploration of goaf in open pit coal mine Published on.2019-08-30 2020-03-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General requirements 2 5 Well mining and goaf exploration work 2 6 Well mining and goaf investigation and surveying 3 7 Well mining goaf geophysical exploration 4 8 Well mining and drilling area drilling and sampling 5 9 Well mining and goaf exploration results 7 Appendix A (informative appendix) Method for estimating the ultimate safety thickness of well goaf

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and managed by the China Coal Industry Association. This standard was drafted. Coal Science and Technology Research Institute Co., Ltd., Pingzhuang Coal Industry (Group) Co., Ltd., China Coal Pingyi Group Limited company, China Coal Xi'an Design Engineering Co., Ltd., Shenhua Baori Hiller Energy Co., Ltd. The main drafters of this standard. Zhang Junying, Li Wei, Ding Xinpin, Xu Xiaohui, Li Wei, Liu Bowen, Li Xianjie, Deng Zengbing, Liu Guang, Wang Yong, Sun Hao, Yao Yong, Zhang Lizhong, Yan Xingjun, Li Weihong, He Changbin, Chen Zaiming, Cai Guangqi, Wang Zhipeng, Cao Fangzhi, Zhou You, Liu Rucheng, Liu Yufeng, Zhao Yuhui, Han Jin, Xie Qidong, Li Yanfei, Ma Ming, Ai Chang, Li Zhengsheng, Wang Wei, Yan Jie, Zuo Yan, Luo Wei, Wei Zhen, Zhang Zhongchao, Li Shaochen, Wang Zhenwei, Wang Jun, Zhang Peng. Technical specification for exploration of goaf in open pit coal mine

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" threezoneofoverburdenfailure 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 geophysicalexploration 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. ......

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