固体充填工作面支架工作特性及顶板控制分析  

Analysis of Working Characteristics and Roof Control of Backfilling Hydraulic Support

作　　者：刘晓明[1] 赵同彬[1] 王明强[2] 李占海[1] 房凯[1] 

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛266590 [2]开滦(集团)有限责任公司,河北唐山063000

出　　处：《山东科技大学学报（自然科学版）》2017年第2期42-47,共6页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(51674160);山东科技大学人才引进科研启动基金项目(2014RCJJ026;2015RCJJ044)

摘　　要：以唐山矿9煤层充填工作面为工程背景,采用现场实测与数值模拟相结合的方法,对充填液压支架工作特性及工作面顶板沉降控制效果进行研究。研究结果表明:固体充填工作面矿压显现缓和,充填支架具有动压系数小的显著工作特性;充填支架的高效支撑对抑制顶板弯曲下沉及层间离层发挥了重要作用,实测充填工作面内顶板累计下沉量占开采高度的13%,工作面上方顶板离层现象主要分布在浅部4m范围内;支架支护阻力的提高可有效控制顶板下沉保证足够的充填空间,当支架支护强度由0.4提高到0.6 MPa时,工作面顶板下沉值降低15.6%,当支护强度继续提高时,支架对顶板下沉的控制效果开始减弱。合理的充填支架支护强度可以控制顶板下沉,保证良好的采空区充填效果,进而减小覆岩及地表变形。This paper,based on the engineering conditions of the working face of No.9seam in Tangshan Coal Mine,investigated the working characteristics and roof subsidence control of backfilling hydraulic support by combining field measurement and numerical simulation analysis.Studies show that in the backfilling working face,the mine pressure behavior is relaxed and the dynamic pressure coefficient of the support is small.The efficient support of the backfilling hydraulic support plays an important role in suppressing roof bending subsidence and separation.The field measurements indicate that the roof subsidence of the working face accounts for about 13% of the mining height and the roof separation above the working face takes place mainly in the shallow part within the depth of 4m.The improvement of support resistance can effectively control roof subsidence and ensure enough filling space.When support strength increases from 0.4to 0.6 MPa,the roof subsidence value decreases by 15.6%.However,when the support strength continues to increase,the control effect of the support on roof subsidence begins to weaken.Therefore,reasonable hydraulic support strength can effectively control roof subsidence and guarantee good goaf filling effect,thus reducing roof overburden and surface deformation.

关 键 词：固体充填采煤 充填支架 工作特性 支护强度 顶板控制 

分 类 号：TD325.4[矿业工程—矿井建设]