动压影响下陷落柱破裂机理研究  

Study on the Fracture Mechanism of Collapse Column Under the Influence of Dynamic Pressure

作　　者：邢松涛[1,2] 王连国[1,2] 侯化强[1,2] 

机构地区：[1]深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [2]中国矿业大学力学与建筑工程学院,江苏徐州221008

出　　处：《煤矿安全》2012年第7期60-62,共3页Safety in Coal Mines

基　　金：国家重点基础研究发展计划(973计划)资助项目(2010CB226805);国家自然科学基金资助项目(50874103);国家重点实验室开放基金资助项目(SKLGDUEK0905)

摘　　要：为研究采场动压对陷落柱裂隙带的扰动破坏机理,采用FLAC3D程序模拟裂隙带内水平应力变化及塑性区分布随工作面推进时的规律。数值模拟结果表明,陷落柱周边裂隙带内的裂隙受开采影响极易发生扩展贯通,进而诱发矿井突水事故。分析结果表明,裂纹因所受水平地应力变小而发生扩展与贯通,从而使裂隙带成为矿井导突水优势通道。In order to research the disturbance and destruction mechanism of the the fracture zone around collapse column caused by the dynamic pressure, the FLAC3D software was used to simulate the variation of the horizontal stress and distribution of plastic zone in frac- ture zone with the advance of the working face. The numerical simulation results provided that the cracks in the fracture zone around collapse column easily occurred crack propagation and coalescence which may lead to water inrush. The results showed that crack was propagation and coalescence due to the reduce of horizontal stress, which may lead the fracture zone to be dominant channel for mine water - conducting .

关 键 词：陷落柱 裂隙带 动压 扰动破坏 数值模拟 

分 类 号：TD322[矿业工程—矿井建设]