阜新五龙矿深部冲击地压ANSYS有限元数值模拟

Numerical Simulation of Deep-level Rockburst Using ANSYS FEM Software

基于AN SY S有限元分析软件,重点对辽宁阜新五龙矿深部冲击地压进行了数值模拟研究,根据实际开采条件建立了AN SY S有限元模型,通过模拟开采311工作面得到了推采距离为100、200、300及400 m时的顶底板Y向应力等值线图,指出顶板Y向应力大小是判断冲击地压是否发生的重要因素,当开采100 m和400 m时工作面迎头位置产生高应力集中区,极易发生冲击地压事故。数值模拟结果表明:阜新五龙矿属于煤体压缩型冲击地压,同时伴有火成岩墙侵入影响。AN SY S有限元数值模拟对深部矿井开采具有一定指导意义。

The characteristics of deep-level rockbursts are numerically studied using ANSYS FEM software in this paper, with focuses being placed on the deep-level rockbursts at Wulong coal mine in Fuxin. The ANSYS finite element models are established in accordance with the practical exploitation conditions. Taking the 311 working face of Wulong coal mine as an example, the contours of vertical stresses in the roof and floor are obtained corresponding to the mining distances of 100 m, 200 m, 300 m and 400 m respectively. It is indicated that the magnitude of vertical stress is the important influencing factor of rockburst. As the 100 m and 400 m working faces are mined, the high stress concentration regions will form in front of working faces and rockbursts are impending. The numerical simulation shows that rockbursts occurring at Wulong mine belongs to the type of compression of coal blocks accompanied by intrusion of igneous rock wall. The numerical simulation using ANSYS can be provide a guidance on deep-level mining.