文献类型：期刊文献

中文题名：煤层底板采动破坏特征流固耦合分析

英文题名：Fluid-solid Coupling Analysis of Coal Seam Floor Failure Features

作者：李可

第一作者：李可

机构：[1]贵州理工学院矿业工程学院

第一机构：贵州理工学院矿业工程学院

年份：2017

卷号：48

期号：3

起止页码：171-174

中文期刊名：煤矿安全

外文期刊名：Safety in Coal Mines

收录：CSTPCD;;北大核心:【北大核心2014】；

语种：中文

中文关键词：FLAC^3D;流固耦合;数值模拟;底板采动;破坏特征

外文关键词：FLAC^3D; fluid-solid interaction; numerical modeling; floor mining; failure characteristic

摘要：以山西龙矿盘道煤业有限公司2~#煤层的采场条件为工程背景,基于FLAC^(3D)数值仿真软件对工作面回采过程中煤层底板采动破坏特征进行流固耦合数值模拟。研究表明:煤层回采后,采空区底板垂直应力呈"半椭圆"形。采空区底板垂直位移呈"环状"分布,且采空区底板下方10m内垂直位移受采动影响较大,采空区底板塑性区大致形成了一个平底"碗状"破坏形态,采空区中部底板岩体受水平采动应力影响较大,以剪切破坏为主。采空区两端煤壁附近底板受支承压力影响较大,以拉张破坏为主。
Taking the stope conditions of No.2 coal seam in Shanxi Longkuang Pandao Coal Company as the engineering background,FLAC^3D is used to conduct numerical s imulation of fluid-solid for floor failure features in the working face advancing process.The research shows that vertical stress of gob roof is ＂semi-elliptical＂ shape after coal seam mining.Vertical displacement of gob roof is ＂annular＂ distribution,and vertical displacement below gob roof within 10 m is greatly influenced by mining; gob floor plastic zone forms a roughly flat ＂bowl＂ failure pattern; rock mass in the middle of the gob floor is greatly influenced by horizontal stress,given priority to shear failure.The floor near the coal wall on both ends of gob roof is greatly influenced by abutment pressure,given priority to tensile failure.