基于相似模拟的火成岩下开采矿压规律分析

Based on the face of Ⅱ884-1 in Luling mine, the main roof breaking and stress variation under the conditions of different igneous rock was simulated and the achieved results are as follows: (1) Under the condition of the same thick main roof (igneous rock), the more area the igneous intrusive, the more the peak strain of the pressure cells which is at the roof and floor is. When the igneous intrusion area is equal, the peak strain of the pressure cells is almost same. (2) when the thickness of igneous rocks was increased, the distance of first breaking and cycle breaking increase accordingly.(3) When the igneous intrusion area is the same and the thickness is not, the more the igneous rock thickness is, the higher the peak strain is. The results of the research not only provide a basic basis for roof control design and roof processing in the face, but also provide a reference for the movement and breaking of the roof which is under the conditions of igneous intrusion.