伴生台阶断层近距离煤层开采覆岩运移及应力变化规律试验研究  

Experimental Study on Overburden Movement and Stress Variation of Coal Seam Mining with Associated Step Faults

作　　者：孙亚楠[1,2] 张培森 颜伟[1,2] 赵亚鹏 闫奋前[1,2] 吴俊达 SUN Yanan;ZHANG Peisen;YAN Wei;ZHAO Yapeng;YAN Fenqian;WU Junda(State Key Laboratory of Mining Disaster Prevention and Control,Shandong University of Science and Technology,Qingdao 266590,China;Mining Engineering National Experimental Teaching Demonstration Center,Qingdao 266590,China)

机构地区：[1]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590 [2]矿业工程国家级实验教学示范中心,山东青岛266590

出　　处：《煤矿安全》2020年第7期48-54,60,共8页Safety in Coal Mines

基　　金：国家重点研发计划资助项目(2018YFC0604702);国家自然科学基金资助项目(51509149,51379119,51774199);山东省重点研发计划资助项目(2018GSF120009)。

摘　　要：为研究近距离煤层下行开采同时伴有台阶断层的特殊情况,以柴里煤矿上、下工作面与台阶断层为研究对象,借助相似材料模拟试验对近距离煤层开采过程中覆岩运移及相关应力变化规律进行了研究。研究结果表明:单煤层开采中覆岩存在3种垮落结构与3种垮落形式;上下煤层开采覆岩垮落存在明显的"梯形空间"与"三角空间"的差异;下层煤开采整体呈现"随挖随垮、无明显周期来压步距、很难形成梁式结构"的特点;且当存在断层时,支承压力的传递往往受到断层的应力阻隔作用,越靠近断层顶板应力集中程度越高。In order to study the special case of down-going coal seam mining accompanied by step faults,the upper and lower working faces and step faults of Chaili Coal Mine are used here as research objects.Overlapping rock movements and their correlation during the close-coal mining process are simulated by similar material simulation tests.The stress variation law was studied,and the research results show that:there is a crack structure and three broken forms in the overburden in single coal seam mining;there is a significant difference between"trapezoidal space"and"triangular space"in the overburden mining in the upper and lower coal seams;coal mining as a whole has the characteristics of"falling with digging,without obvious cycle to step,and difficult to form a beam structure";and when there is a fault,the transmission of pressure is often affected by the stress barrier of the fault,and the closer it is to the roof,the higher levels of stress concentration.

关 键 词：近距离煤层 相似模拟 台阶断层 覆岩垮落 应力变化 

分 类 号：TD325[矿业工程—矿井建设]