复采工作面过冒顶区顶板断裂特征及控制研究

doi:10.13722/j.cnki.jrme.2015.0526

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Abstract The residual coal mining face #3101 at Shenghua Coal Industry of Jincheng Anthracite Mining Group was studied to investigate the roof fracture characteristics，surrounding rock stress distribution and support stress state in the caving zone for residual coal mining face using the analog simulation considering the coal face sloughing，tip-to-face flaking and larger roof weighting strength features. On the basis of the simulation results，a mechanical model of residual coal mining field was established，a formula calculating the hydraulic support strength was derived，and further surrounding rock control technology in the caving zone for residual coal mining face was proposed. The roof of residual coal mining field was found to form easily thicker and long-span advanced fractures. The caving zone weakened the stress transfer of roof strata and aggravated the loading intensity of the support pressure. The working resistance of the hydraulic support suddenly increased due to the effect of advanced large fracture，its maximum value from numerical simulation is 16 200 kN，and the theoretically calculated value is 16 110.5 kN. The residual coal mining face must be grouted before passing through the caving zone. The relationship between the support working resistance and filling body strength was determined.

Key words： minning engineering residual coal mining caving zone roof fracture characteristics support resistance surrounding rock control

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	Articles by authors
	WANG Kai
	GONG Peilin
	ZHANG Xiaoqiang
	LIAN Qingwang
	LI Jianzhong
	DUAN Dong

Cite this article:

WANG Kai,GONG Peilin,ZHANG Xiaoqiang, et al. Characteristics and control of roof fracture in caving zone for residual coal mining face[J]. , 2016, 35(10): 2080-2088.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.0526 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/I10/2080

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