煤厚变化区采动应力演化及其冲击影响研究  

Mining-induced stress changes and rock burst effect in thickness variation of a coal seam

作　　者：尚秀全 杨浩宇 艾国 张永贵 朱广安 SHANG Xiuquan;YANG Haoyu;AI Guo;ZHANG Yonggui;ZHU Guang an(Shenmu Vocational and Technical College,Shenmu 719300,China;North Weijiamao Power and Coal Co.,Ltd.,Ordos 017000,China;School of Energy Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)

机构地区：[1]神木职业技术学院,陕西神木719300 [2]北方魏家峁煤电有限责任公司,内蒙古鄂尔多斯017000 [3]西安科技大学能源学院,陕西西安710054

出　　处：《中国矿业》2020年第7期148-151,157,共5页China Mining Magazine

基　　金：国家自然科学基金项目资助(编号:51904235);中国博士后科学基金项目资助(编号:2018M643692);陕西省自然科学基础研究计划项目资助(编号:2019JQ-487);陕西省教育厅专项科学研究计划项目资助(编号:18JK0497)。

摘　　要：为探究深部煤厚变化区冲击地压显现机理,以山东某矿孤岛工作面为工程背景,基于矿震活动分布规律和揭露的煤层变薄带,采用数值模拟方法分析了煤层厚度变化对冲击地压的影响。结果表明:在煤厚变化区初始应力集中,且煤层越薄应力增大的程度也越大;当工作面采动推进至煤厚变化区时,这一现象更为明显。In order to investigate rock burst mechanism in thickness variation of deep unburied coal seam,an island working face in Shandong province is considered as engineering practice background.Through microseismic activities and the observed variable thickness of the coal seam along the open-off cut,the influence of coal seam thickness variation on rock burst is analyzed by numerical simulation.The results show that the increasing thickness of the thinning accentuates the increase in stresses.The phenomenon will be more obvious when mining activity approaches the thickness variation of a coal seam.

关 键 词：煤层变薄 冲击地压 应力变化 数值模拟 

分 类 号：TD324[矿业工程—矿井建设]