门克庆矿31201工作面复合水体下安全开采技术研究

doi:10.19286/j.cnki.cci.2023.04.010

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Abstract In order to evaluate the safety and reliability of coal seam mining under the composite water body on the roof of No.31201 Face in Menkeqing Mine, theoretical calculation, numerical simulation and theoretical analysis were used to study the law of water filling on the roof of the working face and the evolution of seepage field of sparse drop mining, and a reasonable mining technology plan was given. The research results showed that: the overburden rocks of No.3-1 coal seam were all of medium-hard type, and the overburden damage height could be expected according to the crack mining ratio of 15 and collapse mining ratio of 6; the direct water-filled aquifer in the working face of the first mining area of Menkeqing mine could be sparred and lowered; and it was feasible to lower the water level of the aquifer within the height of mining fissure development in the initial mining area of No.31201 Face to the design value by sparing water in the pre-mining drill hole. The above research results could guide the safe mining of the working face and provide a reliable basis for the water control program, and also provide reference significance for coal mining under similar geological conditions of water bodies.

Key words： composite water body mining fissure overburden damage seepage field sparse drop mining coal mining under water bodies

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	Yao Yilin

Cite this article:

Yao Yilin. Research on safe mining technology under composite water body in No.31201 Face of Menkeqing Mine[J]. CCI, 2023, 46(4): 40-44，51..

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http://www.mtyhg.com.cn/EN/10.19286/j.cnki.cci.2023.04.010 OR http://www.mtyhg.com.cn/EN/Y2023/V46/I4/40