李振华;翟常治;李龙飞;

• 1:河南理工大学能源科学与工程学院

摘要(Abstract)：

为研究承压水压与煤层陷落柱位置这两种因素对陷落柱突水的影响,在分析固流耦合数学模型的基础上,利用数值模拟软件FLAC3D,以双柳矿地质条件为背景,分别对3 MPa和5 MPa承压水压下开采上、下两组煤4种情况进行模拟,分析陷落柱及其周边围岩的渗流-塑性破坏耦合场、应力场和位移场的变化。结果表明:随着工作面推进至接近陷落柱,工作面前方集中应力场与柱体周边应力场发生耦合,并出现应力集中,当水压为5 MPa开采上组煤时应力集中系数最大,最容易形成突水危险区域;当上组煤工作面距离陷落柱为30m时,陷落柱渗流场与集中应力场开始连通,在开采下组煤时这一距离比上组煤扩大15²0 m;煤层底板随工作面推进发生压缩-膨胀周期变化,引起拉伸、剪切破坏。

关键词(KeyWords)： 安全工程;带压开采;岩溶陷落柱;突水影响因素;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51374093,51104058);; 教育部高等学校博士学科点专项科研基金项目(20114116120005)

作者(Authors): 李振华;翟常治;李龙飞;

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