论文部分内容阅读
针对浅埋煤层采出后易发生地表塌陷地质灾害现象,分析了浅埋煤层采空区上覆岩层破坏特征及断裂岩层结构的稳定性,进行了不同含水量岩石力学特性的实验研究.结果表明:岩体试件在天然状态与饱水状态时的剪切力-剪切位移曲线变化趋势是基本一致的,但试件在饱水状态时的抗剪强度与天然状态相比大幅下降;不同含水量试件在单轴压缩条件下的应力-应变曲线随着含水量的增加,曲线的位置降低,峰值强度相应降低.
In view of the geological disasters prone to surface subsidence after the mining of shallow coal seam, the failure characteristics of the overlying strata and the stability of the fracture rock strata in the mined-out area of shallow coal seam are analyzed, and the experimental research on rock mechanical properties with different water content is carried out. : The trend of shear force-shear displacement curve of rock specimen is basically the same in the natural state and the saturated state, but the shear strength of the specimen in the state of saturated water drops greatly compared with the natural state; With the increase of water content, the stress-strain curve of water content specimen under uniaxial compression reduces the position of the curve and the peak intensity decreases accordingly.