CAJ | 학술논문

以典型断层型冲击地压矿井为例，采用相似材料模拟试验方法，基于覆岩空间结构失稳与断层活化耦合致灾原理，分析了巨型逆冲断层下盘煤层开采采场覆岩运动过程、工作面倾向支承压力及断层面的应力变化规律，研究了巨型逆冲断层影响下巨厚坚硬顶板易冲击煤层冲击地压显现特征。试验结果表明：煤层开采诱发巨型逆冲断层冲击灾变过程分为3阶段：第1阶段，受煤层采动影响，上覆岩层发生空间运动，煤体中形成明显高应力集中区；第2阶段，覆岩多层空间结构演化诱发断层活化，断层活化导致空间结构外部岩体回转，给空间结构施加外部载荷，造成空间结构失稳加剧，煤岩体的应力激增，影响范围扩大；第3阶段，断层滑移释放能量，提供动载荷。根据应力监测数据变化规律，划分了逆冲断层的明显影响区域，研究结果为断层影响下煤层开采的防冲策略与设计提供可靠依据。
이전형단층형충격지압광정위례，채용상사재료모의시험방법，기우복암공간결구실은여단층활화우합치재원리，분석료거형역충단층하반매층개채채장복암운동과정、공작면경향지승압력급단층면적응력변화규률，연구료거형역충단층영향하거후견경정판역충격매층충격지압현현특정。시험결과표명：매층개채유발거형역충단층충격재변과정분위3계단：제1계단，수매층채동영향，상복암층발생공간운동，매체중형성명현고응력집중구；제2계단，복암다층공간결구연화유발단층활화，단층활화도치공간결구외부암체회전，급공간결구시가외부재하，조성공간결구실은가극，매암체적응력격증，영향범위확대；제3계단，단층활이석방능량，제공동재하。근거응력감측수거변화규률，화분료역충단층적명현영향구역，연구결과위단층영향하매층개채적방충책략여설계제공가고의거。
Taking typical fault rockburst mine for example, using similar simulation test to analyze overlying strata movement and the stress variation rule of fault plane and dip abutment pressure after the coal seam of the giant thrust fault footwall has been exploited based on coupling disaster-causing mechanism between spatial structure instability of overlying strata and fault activation, and the rockburst characteristics of extra-thick hard roof and easy burst coal seam influenced by giant thrust fault are studied. The results show that there are three stages in rockburst catastrophe process of the giant thrust fault induced by mining ultra thick seam. The first stage, high stress concentration region forms under the influence of overlying strata movement when mining coal seam. The second stage, overlying strata spatial structures evolution induce fault activation, and fault activation leads to external rock mass of spatial structures rotation applying extraneous load to spatial structures, causing instability increased, stress increased and influence scope enlarged. The third stage is the fault slip with releasing energy and providing dynamic load . Ultimately, the scope of significantly affect areas of thrust fault is delimited combining with the stress observation data. The results provides reliable basis for the protection strategy and control design of rockburst for coal mining influenced by giant thrust fault.