UDEC软件对矿山采空区崩塌过程进行应力分布的研究

为了研究矿山采空区坡体的应力(裂隙)分布情况,并对崩塌过程分析进行检验,本文采用离散元数值软件(UDEC)对纳雍县张家湾镇普洒煤矿采煤过程中覆岩裂隙发生、发展及其变化过程进行模拟。结果表明:随着煤层开采的推进,覆岩裂隙向上发展且密度逐渐增多;由于采空区范围过大时,部分被重新压实,裂隙发育至地表形成开切眼;最后在外力作用下整条裂缝垂直贯通,形成危岩体的发展规律,可为类似的矿山地质灾害防治提供基础依据。

Research on Stress Distribution in Collapse Process of Mine Goaf by UDEC Software

In order to study the distribution of stress (cracks) in the slope of mined-out area and test the analysis of collapse process, discrete element numerical software (UDEC) is used to simulate the occurrence, development and change of overburden cracks in Pusha Coal Mine, Zhangjiawan Town, Nayong County. The results show that with the advance of coal seam mining, overburden fissures develop upward and the density increases gradually; because the goaf area is too large, some of them are re-compacted, and the fissures develop to the surface to form open holes; finally, under the action of external forces, the whole fissure is perpendicularly penetrated, forming the development law of dangerous rock mass, which can provide basic accordance for similar mine geological disaster prevention.