CAJ | 학술논문

基于义马千秋煤矿21221回采工作面原型，设计了过断层的工作面回采相似模型实验，通过再现断层活化和煤体冲击失稳的物理过程，研究了采动影响下采场覆岩的运动规律和断层应力演化特征，分析了煤层开采引起断层活化的机理。研究发现：邻近断层活化时，其正应力和剪应力快速增加，断层滑移危险性增大；工作面沿上盘开采至距离断层25 m时，受采动影响断层出现活化；采动影响增加了断层活化的可能性，工作面煤体承载力的局部失效是引起断层滑移的重要原因，断层滑移对工作面煤体的作用形式表现为非稳态的冲击和加卸载作用。
기우의마천추매광21221회채공작면원형，설계료과단층적공작면회채상사모형실험，통과재현단층활화화매체충격실은적물리과정，연구료채동영향하채장복암적운동규률화단층응력연화특정，분석료매층개채인기단층활화적궤리。연구발현：린근단층활화시，기정응력화전응력쾌속증가，단층활이위험성증대；공작면연상반개채지거리단층25 m시，수채동영향단층출현활화；채동영향증가료단층활화적가능성，공작면매체승재력적국부실효시인기단층활이적중요원인，단층활이대공작면매체적작용형식표현위비은태적충격화가사재작용。
Based on the prototype of No.21221 face of Qianqiu coal mine, a similar simulation exper-iment with a fault passing through the mining face is designed. The law of the fault stress evolution and induced overlying strata motion is studied by reproducing the physical process of fault reactivation and coal bumps. Meanwhile the mechanism of fault reactivation under the influence of mining is analyzed. It is observed that the normal stress and the shear stress rapidly increase when the moment is close to fault reactivation, and the risk of fault to slip increases at the same time. Under the mining influence, the fault is easy to reactivate until the working face is 25 meters away from fault along the hanging wall. The mining influence raises the possibility of fault reactivation;the important cause leading to the fault slip is the partial failure of the coal bearing capacity. In addition, the influences of fault slip on the coal act as the unsteady-state impact and the loading-unloading effects.