摘要
以杨村煤矿8601综采面地质及开采条件为背景,采用大型非线性三维计算机数值模拟,对不同推进步距的采场围岩变形与破坏进行了准动态模拟研究。结果表明,随着工作面推进,煤层底板岩层具有采前应力升高、采后应力降低和恢复三个阶段,并每隔22m重复出现;受采动影响的岩层在采空区中间下沉值最大,向两侧逐渐减小;底板临界破坏深度为5m;应力集中系数为1.25。
According to the geological and mining conditions in No. 8601 fully mechanized working face of Yangcun Coalmine, the pseudo-dynamic numerical simulation of the deformation-failure of surrounding rock in the working face with different advancing distances was carried out by employing large nonlinear 3D computer numerical simulation method. The results show that with the advancing of working face the stress in seam floor rock came to three stages, i.e. the stress increased before mining, decreased after mining, and restored, and it repeated every 22 meters; the roof sagging in the rock affected by mining has maximum value in middle of gob and comes to smaller towards both sides of gob; the floor critical failure depth is 5 meters and the stress concentration factor is 1. 25.
出处
《山东科技大学学报（自然科学版）》
CAS
2007年第1期1-3,19,共4页
Journal of Shandong University of Science and Technology(Natural Science)
关键词
中厚煤层
采场围岩
准动态
数值模拟
medium-thickness seam
surrounding rock of working face
pseudo-dynamics
numerical simulation
