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[1]王志强,徐春虎,任亚军,等.孤岛工作面支承压力影响下顶板破坏机理研究[J].中国安全生产科学技术,2019,15(6):105-112.[doi:10.11731/j.issn.1673-193x.2019.06.017]
 WANG Zhiqiang,XU Chunhu,REN Yajun,et al.Study on roof failure mechanism of isolated island working face under abutment pressure[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2019,15(6):105-112.[doi:10.11731/j.issn.1673-193x.2019.06.017]
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孤岛工作面支承压力影响下顶板破坏机理研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
15
期数:
2019年6期
页码:
105-112
栏目:
职业安全卫生管理与技术
出版日期:
2019-06-30

文章信息/Info

Title:
Study on roof failure mechanism of isolated island working face under abutment pressure
文章编号:
1673-193X(2019)-06-0105-08
作者:
王志强123 徐春虎123 任亚军123 仲启尧123 罗健侨123 苏泽华123 崔冬雪123
(1.中国矿业大学(北京) 能源与矿业学院,北京 100083;
2.中国矿业大学(北京) 共伴生能源精准开采北京市重点实验室,北京 100083;
3.中国矿业大学(北京) 煤炭安全开采与地质保障国家级实验教学示范中心,北京 100083)
Author(s):
WANG Zhiqiang123XU Chunhu123REN Yajun123ZHONG Qiyao123LUO Jianqiao123SU Zehua123CUI Dongxue123
(1.School of Energy and Mining Engineering,China University of Mining & Technology (Beijing), Beijing 100083, China;
2.Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology (Beijing), Beijing 100083, China;
3.National Experimental Teaching Demonstration Center of Safe Coal Mining and Geological Guarantee, China University of Mining and Technology (Beijing), Beijing 100083, China)
关键词:
孤岛工作面支承压力顶板破坏机理研究“O-X”破断
Keywords:
isolated island working face abutment pressure roof failure mechanism study “O-X” fracture
分类号:
X936;TD323
DOI:
10.11731/j.issn.1673-193x.2019.06.017
文献标志码:
A
摘要:
为了探讨孤岛工作面支承压力影响下顶板破坏机理,通过采用理论分析,建立薄板力学模型,对孤岛工作面顶板弯矩分布规律进行分析,并结合实验室数值模拟手段对工作面顶板支承压力集中系数及顶板围岩塑性区演变规律进行研究。研究结果表明:在支承压力作用下,随着推进距离的增大,顶板支承压力集中系数呈现增大的趋势;工作面顶板煤壁中部弯矩显著大于煤壁两侧弯矩,该结果合理解释了工作面方向上支架工作阻力不相等的规律;顶板断裂的塑性区演变特征存在时空效应及力学特征,顶板四周所形成的横向“O”型破断与横向“X”型破断,共同构成了顶板破断的横“O-X”破断形式。
Abstract:
In order to discuss the mechanism of roof failure in the isolated island working face under the influence of abutment pressure, a mechanical model of thin plate was established by means of theoretical analysis, then the distribution laws of bending moment in the roof of isolated island working face were analyzed, and the concentration coefficient of roof supporting pressure and the evolution laws of plastic zone in the roof surrounding rock were studied by combining with the laboratory numerical simulation. The results showed that under the effect of supporting pressure, the concentration coefficient of roof supporting pressure increased with the increase of advancing distance. The bending moment at the middle of coal wall in the roof of working face was significantly greater than that on both sides of coal wall, which explained reasonably the law that the working resistance of the support in the direction of working face were not equal. The evolution characteristics of plastic zone for the roof fracture had the spacetime effect and mechanical characteristics, and the transverse “O”-type fracture and transverse “X”-type break formed around the roof constituted the transverse “O-X” fracture form of roof fracture together.

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备注/Memo

备注/Memo:
收稿日期: 2019-03-07
* 基金项目: 国家自然科学基金项目(51774289);国家自然科学基金青年基金项目(51404270);中央高校基本科研业务费专项(2011QZ06)
作者简介: 王志强,博士,副教授,主要研究方向为采矿新方法、矿山压力及岩层控制。
通信作者: 徐春虎,硕士研究生,主要研究方向为孤岛工作面下伏大巷围岩支护优化、采矿新方法及矿山压力与岩层控制。
更新日期/Last Update: 2019-07-09