良庄煤矿上保护层开采卸压机理与保护范围数值模拟研究  

Pressure Relief Mechanism at Upper Protective Layer Mining in Liangzhuang Coal Mine and Numerical Simulation of Protection Scope

作　　者：鲁明星[1] 

机构地区：[1]唐山学院土木工程系,河北唐山063000

出　　处：《金属矿山》2015年第4期7-11,共5页Metal Mine

基　　金：河北省科技厅项目(编号:10276723)

摘　　要：以良庄煤矿3213、3214上保护层工作面为工程背景,研究分析了上保护煤层开采卸压机理,为确定上保护煤层开采后下部保护范围,运用FLAC3D数值模拟软件模拟了实际地质条件下保护层开采行为。研究表明:随上保护层开采范围的增加,底板一定范围内的煤岩层在采空区内部呈现卸压,卸压区内卸压效果明显,卸压范围逐渐增大,应力分布由"V"型分布逐渐变为"U"型分布,但边界处应力集中情况逐渐增大,应力峰值与范围增加。通过综合经验法和卸压准则判定法得到3414工作面合理布置:3414工作面内错3214切眼位置19 m,停采线位置内错19 m,运煤巷内错17 m。With 3213,3214 working face of protective layer in Liangzhuang Coal Mine as the engineering background,the pressure relief mechanism of upper protection layer is analyzed. In order to determine the protection scope of the lower coal seam after upper protective layer mined. FLAC^3D numerical simulation software was used to simulate the protective layer mining under actual geological conditions. Research shows that： with the increase of mining scope of protective layer,a certain range of coal strata on the floor is showing as in pressure relief at internal goaf with obvious effect in pressure relief zone. The range of pressure relief zone increases gradually. The stress distribution shows as the＂U＂type gradually from＂V＂type. Stress concentration at the boundary is gradually increased,and its peak stress and range is also increased; Through the comprehensive experience method and the pressure relief criteria,a reasonable arrangement of 3414 working face was determined. The open-off cut located at 19 m from 3414 working face internal misaligned with 3214 working face,the mining line stopped at 19 m,and the coal lane is at 17 m in turn.

关 键 词：上保护层 卸压机理 保护范围 数值模拟 

分 类 号：TD325[矿业工程—矿井建设]