巷道形状对高应力软岩巷道变形的影响
Impact of Roadway Shape on High Stress Soft Rock Roadway Deformation
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摘要: 对于由于上部缺乏坚硬关键层而导致承受较高压应力的软岩巷道围岩变形严重，稳定性难以控制问题，以邢村煤矿为工程背景，基于有限差分软件FLAC3D，系统地研究了巷道截面形状等对于巷道围岩变形、压力和塑性区分布的影响规律。结果表明：在偏心压力下，矩形巷道两帮受压最不均匀；梯形巷道两帮受压均匀，巷道水平位移最小，半圆拱形与拱形巷道介于两者之间，认为选择力学性能较好的圆拱巷道效果较好。Abstract: For the problems of serious deformation of withstanding high stress soft rock roadway caused by the lack of hard key in upper layer. In this paper, taking Xingcun Coal Mine as engineering background, based on the finite difference software FLAC3D, we systematically studied the influence laws of cross-sectional shape of roadway on the roadway deformation, stress, and plastic zone. The results showed that the two walls of rectangular roadway were in uneven pressure under eccentric pressure; the two walls of keystone roadway were in uniform pressure and the horizontal deformation was small; semicircle with arched and arched tunnels was between two. Arched roadway with good mechanical properties was a better choice.
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Keywords:
- high stresses /
- soft rock roadway /
- stress distribution /
- sectional shape /
- plastic zone /
- numerical simulation
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