梁冰,汪北方,李刚,穆贵清

• 1:辽宁工程技术大学力学与工程学院
• 2:辽宁工程技术大学矿业学院
• 3:北京昊华能源股份有限公司

摘要(Abstract)：

基于煤岩介质的动力扰动载荷理论,对动力扰动诱发深埋巷道帮部煤体冲击矿压机制进行了研究。利用FLAC3D软件数值模拟了深埋巷道围岩,尤其是帮部煤体对动力扰动的响应。结果表明,随扰动载荷增加,巷道围岩速度、应力和位移均产生了急剧变化,两帮煤体发生严重拉伸破坏,塑性分布区明显扩大。始终维持极限平衡状态的深埋巷道帮部煤体在动载反复扰动下容易产生超高应力集中,帮壁煤体发生破坏,形成应力转移,导致深部煤体由三向应力状态迅速转化为双向或单向应力状态。同时,动载产生的强烈振动改变了顶底板对煤层的约束条件,降低了摩擦阻力,诱发深埋巷道帮部煤体冲击矿压。根据现场统计,大安山矿+550 m西二褶曲轴10下槽回风顺槽动力扰动诱发的冲击矿压为35次,约占冲击显现总数的93.3%。

关键词(KeyWords)： 采矿工程;深埋巷道;动力扰动;冲击矿压;数值模拟

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 梁冰,汪北方,李刚,穆贵清

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