摘要
为了有效控制吸水膨胀性软岩巷道的底鼓,以安山煤矿31煤四盘区主运大巷为研究对象,以载荷作用和水理作用为综合影响因素分析了巷道的底鼓机理,提出了卸压槽防治底鼓的措施。利用FLAC^(3D)数值模拟软件,研究了不同深度切槽下的巷道围岩应力分布与位移情况,进一步确定了卸压槽参数。研究表明采用切槽卸压减缓了巷道帮角应力集中效应,使得底板垂直应力向深部转移,卸压槽壁的挠曲变形吸收了底板的变形量。现场实践证明采用的卸压槽和卸压参数能有效控制巷道底鼓。
In order to effectively control floor heave of water-absorption-expansion soft rock roadway,we analyzed floor heave mechanism based on double factors of loading and water conditioning. Pressure-relief groove was used to control floor heave.The stress distribution and displacement of roadway surrounding rock at different depth of pressure-relief were studied using FLAC3D software,and the pressure-relief groove parameters are further determined. The research shows that,adoption of pressure-relief groove reduces stress concentration effect of roadway angle and transfers vertical stress of the floor to deep. The flexure deformation of the diaphragm wall of pressure-relief groove absorbs the floor deformation. Field application has proved that the proposed pressure-relief groove and parameters can control floor heave effectively.
作者
张杰
周府伟
杨涛
谢沛
沈瑞杰
郭建平
ZHANG Jie;ZHOU Fu-wei;YANG Tao;XIE Pei;SHEN Rui-jie;GUO Jian-ping(School of Energy Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Shaaxi Shanmei Northern Shaanxi Coal Mining Industry Limited Company,Yulin 719000,China)
出处
《煤炭工程》
北大核心
2019年第3期37-40,共4页
Coal Engineering
基金
国家自然科学基金资助项目(51774229
51474173)
陕西省创新能力支撑计划-科技创新团队资助(2018TD-038)
"煤炭开采水资源保护与利用"国家重点实验室开放基金资助(SHJT-17-42.3)
关键词
软岩巷道
底鼓机理
吸水膨胀
卸压槽
应力集中
soft rock roadway
floor heave mechanism
water swelling
pressure-relief groove
stress concentration