首页|Investigation on fracture models and ground pressure distribution of thick hard rock strata including weak interlayer

Investigation on fracture models and ground pressure distribution of thick hard rock strata including weak interlayer

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Dynamic disasters,such as rock burst due to the breaking of large area stiff roof strata,are known to occur in the hard rock strata of coal mines.In this paper,mechanical models of the fracturing processes of thick hard rock strata were established based on the thick plate theory and numerical simulations.The results demonstrated that,based on the fracture characteristics of the thick hard rock strata,four fracture models could be analyzed in detail,and the corresponding theoretical failure criteria were determined in detail.In addition,the influence of weak interlayer position on the fracture models and ground pressure of rock strata is deeply analyzed,and six numerical simulation schemes have been implemented.The results showed that the working face pressure caused by the independent movement of the lower layer is rela-tively low.The different fracture type of the thick hard rock strata had different demands on the working resistance of the hydraulic powered supports.The working resistance of the hydraulic powered supports required by the stratified movements was lower than that of the non-stratified movements.

Thick hard rock strataThick plate theoryStratification movement of rock strataNumerical simulationsGround pressure distribution

Meilu Yu、Jianping Zuo、Yunjiang Sun、Changning Mi、Zhengdai Li

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School of Mechanics & Civil Engineering,China University of Mining & Technology (Beijing),Beijing 100083,China

State Key Laboratory of Coal Resources and Safe Mining,China University of Mining & Technology (Beijing),Beijing 100083,China

Beijing Outstanding Young Scientist Program of ChinaBeijing Outstanding Young Scientist Program of ChinaBeijing Outstanding Young Scientist Program of ChinaNational Natural Science Foundation of ChinaShaanxi Coal Group Key Project of ChinaFundamental Research Funds for the Central Universities of China

BJJWZYJH0120191141303741877257516224042018SMHKJ-A-J-032021YJSLJ23

2022

矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDCSCDSCIEI
影响因子：1.222
ISSN：2095-2686
年,卷(期)：2022.32(1)
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