采矿与安全工程学报2017，Vol.34Issue(1)：54-59,66,7.DOI:10.13545/j.cnki.jmse.2017.01.008
坚硬顶板条件下临空煤柱失稳机制与防治技术
Instability mechanism and control technology of coal pillar bumps under hard roof
摘要
Abstract
Facing frequent coal bumps in the side of invading coal pillar during the stoping of coal seam 11 of Xinzhouyao coal mine,based on tests of physical and mechanical properties of coal and the analysis of occurrence regularity of coal bumps,the genesis of the coal bumps in the side of invading coal pillar and the process of impactive instability of the clamping coal were analyzed through the cal-culation of stress state of coal pillar,and the danger-relief scheme of blasting method of roof breaking and pressure relief through gas tunnel was made using according to the conditions of coal seam 11 and its roof and floor.The results have shown that the impactive instability of invading coal pillar is relative to the periodic pressure of the working face:the forced caving out of place causes a hard long hanging plate in both sides of the coal pillar,which is the energy source of the impactive instability of coal pillar;the blasting method of roof breaking and pressure relief can efficiently cut the stress transfer of hard long hanging plate to coal pillar:as the monitoring data of the electromagnetic radiation,mine pressure and slight shock have shown,after blasting,the electromagnetic radiation intensity beside the coal pillar reduced by 68％,the stresses of single hydraulic prop reduced by 20％,and the drilling stress reduced by 80％,which effectively lowered the coal bump hazard of the coal pillar.关键词
冲击地压/坚硬顶板/断顶爆破/电磁辐射Key words
coal bumps/hard roof/blasting method with roof-broken/electromagnetic radiation分类
矿业与冶金引用本文复制引用
王涛,由爽,裴峰,白兴平..坚硬顶板条件下临空煤柱失稳机制与防治技术[J].采矿与安全工程学报,2017,34(1):54-59,66,7.基金项目
国家自然科学基金项目(51504015) （51504015）
中国矿业大学煤炭资源与安全开采国家重点实验室开放基金项目(SKLCRSM15KFB02) （SKLCRSM15KFB02）
中央高校基本科研业务费项目(FRF-TP-15-054A1) （FRF-TP-15-054A1）
