贵州山区煤层采动影响后裂隙发育模拟研究

Simulation research of fissure development of after effects in GUIZHOU mountain coal mining

贵州山区煤矿地质复杂,山区煤层向沟谷开采时,坡体内原有的应力平衡状态被打破,致使坡体发生位移变化,地表产生明显裂隙;在外力作用下,坡体容易失稳,发生滑坡、泥石流、坍塌等大型地质灾害,加剧对环境的破坏[1]。利用通用离散单元法程序(udec}软件)对贵州山区某矿5#煤层1102采煤工作面进行了数值模拟实验,根据实验结果分析了覆岩裂隙发育情况,对比模拟结果和实测数据,发现两者误差甚微,证实了数值模拟的意义,为山区煤矿裂隙水防治提供参考依据。

Mountainous Guizhou coal mine complex geology,when coal mining mountain to valley,the slope of the original body of stress equilibrium is broken,resulting in changes in slope displacement,surface produce significant fissures; the external force,easy slope instability,landslides,large-scale geological disasters landslides,and collapse,increasing damage to the environment[1]. In this paper,the use of generic discrete element method program（ udec4. 0 software） for a coal mine in Guizhou Mountain 5#1102 coalface numerical simulation experiments,the experimental results were analyzed overlying rock fissures,the comparison of the simulation results and experimental data,both errors found little,confirming the significance of the numerical simulation,has been an important basis for prevention and treatment of mine water in the mountains.