倾斜特厚煤层综放带压开采底板破坏特征研究

doi:10.13722/j.cnki.jrme.2014.1450

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Abstract Characteristics of floor failure is very significance for mining under pressure. Taking Wenming coal as the experimental mine，by using the equipment which is sealed two ends by capsules in borehole，affused measurable water between the two capsules and borehole televiewer system and ground penetrating radar，height of floor under large mining depth inclined and extra thick coal seam in fully-mechanized top coal caving face is monitored and analyzed through the digital relationship of fractures around mining such as numbers and depth，numbers and width. At the same time，numerical model experiment of stress change and characteristic of plastic zone are carried out. The results show that：(1) Height of floor under large mining depth inclined and extra thick coal seam in fully-mechanized top coal caving face is 30.1 m；(2) The fracture width is mainly with less than 5 mm before mining and the fracture width is mainly 16–20 mm after mining；(3) The number of fractures is small before mining，with the mining of working face，the number of fractures is on a rising-down-invariant trend；(4) The abutment pressure concentrated coefficient of working face inferior is greater than the above；(5) Floor vertical stress curve on the tilt direction distribution is“spoon”shapes，with the depth of floor increased the pressure release level is decreased and to form the large plastic failure zone.

Key words： mining engineering inclined coal seam fully mechanized sublevel caving mining ground penetrating radar

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	Articles by authors
	CHEN Jigang1
	2
	XIONG Zuqiang3
	4
	LI Hui4
	YU Yang5
	NIE Baisheng1
	WANG Shidong4
	WANG Xiaolei4

Cite this article:

CHEN Jigang1,2,XIONG Zuqiang3, et al. Failure characteristics of floor under predssure inclined and extra thick coal seam in full-mechanized top coal caving faces[J]. , 2016, 35(S1): 3018-3023.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.1450 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS1/3018

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