摘要
断层破碎区域的巷道极易发生变形,随着回采工作面的推进,工作面前方会造成应力集中且加剧断层的活化或者运移,诱发矿区动力学灾害。为了确定断层区煤岩体动压影响范围,以屯宝煤矿缓倾斜煤层1193工作面为研究背景,联合现场实测和理论分析,通过现场布置煤壁应力计和锚杆应力计来收集围岩内部的应力分布信号。以巷道表面变形测量为基础,结合内部应力变化的综合考量,从整体上分析可以确定断层发育区域的动压影响范围为34 m,峰值位置为5 m。动压影响范围的科学确定可以为巷道的合理支护提供支撑,从而保障屯宝煤矿1193综放工作面在断层区域的安全高效生产。
Surrounding rock of roadway here is deformed easily in fault regions. With coal excavation, concentrated stress formed before working face will cause movement or activation of faults, so that it can lead to a dynamic disaster. In response to the determination of the influential range of dynamic pressure in coal-rock fractured fault zone, taking the specific condition of No.1193 working face in Tunbao mine as the field research object. Combined with hybrid analyses, including mechanism analysis and field measurement, the stress distribution parameter inside the surrounding rock is collected through laying the stress detector and anchor bolt in the rib. It can be concluded that the scope of dynamic pressure within the stope is about 34 m, with the peak dynamic pressure occurring at 5 m before the working face. The assessment of the dynamic pressure can optimize the design of supporting reasonably and ensure the safety of the No.1193 working face in Tunbao colliery.
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2016年第2期361-366,共6页
Journal of Mining & Safety Engineering
基金
国家重点基础研究发展计划(973)项目(2015CB251602
2014CB260404)
国家自然科学基金重点项目(U1361206)
关键词
断层破碎区
内部应力
表面变形
动压影响范围
fault broken zone
internal stress
surface deformation
influential range of dynamic pressure
