中厚煤层复合顶板快速无煤柱自成巷适应性研究与应用

doi:10.13722/j.cnki.jrme.2018.0706

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Abstract In order to solve the problems of the waste of coal pillars and the limitation of working faces，the rapid gob-side entry retaining technology by roof cutting and pressure releasing was introduced into the 8304 working face of Tashan coal mine. The technological process and the space-time relationship of the new gob-side entry retaining technology were summarized，based on which the surrounding rock structure was divided into coal support zone，dynamic pressure zone and lane stable zone. Taking 8304 working face as an example with composite roof and medium thick coal seam，the relevant parameters of six key technologies including roof cutting，shaped blasting，constant resistance anchor cable support，retaining support，temporary support and loose blasting were respectively designed. The technical effects of related designs were verified by numerical simulation and field test. The practice results show that the ultimate convergence of the roof and the bottom of the roadway is 261 mm，the shrinkage of the two sides of the roadway is 390 mm，the effective section size of the roadway is 2 839 mm×4 610 mm，and the remained roadway is sufficient to meet the reuse requirement of adjacent working faces.

Key words： mining engineering roof cutting and pressure releasing roadway formed automatically medium thick coal seam composite roof loose blasting adaptability research

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	Articles by authors
	HE Manchao1
	MA Xingen1
	2
	NIU Fulong3
	WANG Jiong1
	2
	LIU Yuxing1
	2

Cite this article:

HE Manchao1,MA Xingen1,2, et al. Adaptability research and application of rapid gob-side entry retaining formed by roof cutting and pressure releasing with composite roof and medium thick coal seam[J]. , 2018, 37(12): 2641-2654.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.0706 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/I12/2641

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