1. Mine Safety Technology Branch,China Coal Research Institute,Beijing　 100013,China; 2. State Key Laboratory of Coal Mining and Clean Utilization, China Coal Research Institute,Beijing　 100013,China; 3. Beijing Haohua Energy Resource Co. ,Ltd. ,Beijing　 102300,China

冲击地压的孕育和发生除应当具有足够能量源之外，能量的有效积聚同样至关重要。通过设计位移控制的夹持试验还原顶底板对煤层的约束作用，结果表明:岩石试块在轴向压力的作用下存在对于煤试块的闭锁作用，具体表现为加载端与中部监测点的位移不同步，该机制能够形成有效的能量积聚。同时，加载过程中煤试块局部位置表现出类似于纵波的变形传导现象，而较大轴压下出现的应力突然调整即为该现象的剧烈表现形式。研究指出，顶底板对于煤层的闭锁作用及煤层自身的变形传导对冲击地压的形成具有促进作用，现场实践表明，在近顶底板位置实施配合表面活性剂的高压注水，能够有效弱化接触面摩擦因数，实现煤壁深处变形能的可控释放，降低冲击危险性。

Besides the sufficient energy source for the development and occurrence of coal bump,the effective accumu-lation is also crucial. The constraint effect of roof and floor on coal seam was investigated through the clamping test. The results show that the displacements of the loading end and the central monitoring point are not synchronized,which proves the existence of atresia effect of rock specimen on coal specimen. The corresponding mechanism is capable of forming an effective energy accumulation. Meanwhile,the deformation conduction similar to P-wave was found at the local position of coal specimen,and the sudden adjustment of stress under a large axial pressure is a violent expression form of this feature. The research reveals that the atresia effect of roof and floor on coal seam and the deformation con-duction of itself have a promoting effect on coal bump. The field practice shows that the high pressure water injection with the surfactant through the position near to roof and floor can weaken the friction coefficient of interface efficiently, and reduce the bump hazard through the controllable release of the deformation energy deep in the coal seam.

LI Haitao,LIU Jun,ZHAO Shankun,et al. Experimental study on the development mechanism of coal bump considering the clamping effect of roof and floor[ J]. Journal of China Coal Society,2018,43(11):2951 -2958.