急倾斜煤层顶板垮落过程的RFPA数值模拟研究

摘要

Take example for 15 coal seam of Chang' gouyu mine, RFPA2D software is used to simulate roof failure process of steep-inclined coal seam with working face moving forwards. Research results indicate that roof supporting pressure of workface is decreased as the roof failure range increased. There exists first weighting and periodic weighting during roof failure process, but strata behavior is not obvious during periodic weighting. Synchronously with the increase of mining depth, floor begins to failure with low depth. Research results have Significance to safe productivity of mine.%以长沟峪矿15槽煤层为例,用RFPA2D软件模拟了急倾斜煤层顶板随工作面推进的垮落过程.研究结果表明,工作面顶板岩体支承压力随顶板冒落范围增大而降低;急倾斜煤层顶板垮落过程中,存在初次来压和周期来压现象,但周期来压期间矿压显现不明显.同时,随采深加大,煤层底板开始出现相应破坏,但破坏深度较小.研究结果,对矿山的安全生产有重要指导意义.