摘要
为避免巨厚岩层运动诱发井下冲击和造成地面建(构)筑物震动损害,以山东某巨厚岩层矿井为研究背景,采用现场监测、理论分析和工程实践等手段,探讨兼顾地面建(构)筑物减震和井下防冲的关键工作面设计方法。研究结果表明:孤岛工作面两侧的采动程度不同,非充分采动区上覆高位悬顶巨厚砾岩及其底部孤岛煤岩柱形成不对称"Γ"型覆岩空间结构;巨厚岩层开采条件下存在一个关键工作面,以工作面整体稳定性和矿震引起地面建(构)筑物的震动损害作为主要评估指标可确定关键工作面及其防冲-减震开采优化方法;在开采设计中采用上述方法可最终确定合理的开采方案,并取得较好的实践效果。
To avoid rock burst and surface building damages induced by super-thick strata movement, design methods of key longwall panels were studied taking both surface building seismic reduction and rock burst into consideration, based on a mine with super-thick strata in Shandong Province. Analysis methods of in-situ testing, theoretical analysis, as well as engineering practice were used. The results show that the mining extent on both sides of the isolated coal pillar is different. In non-full mining areas, the overlying high-position super-thick conglomerate and the isolated coal pillar at the bottom form the “Γ” shape overlying strata spatial structure. There exists a key longwall panel when mining under super-thick strata, and it can be evaluated by the overall stability and surface building damage induced by mine-quakes. The determination of key longwall panel and optimization methods of rock burst prevention and seismic reduction are clarified. A reasonable mining design is determined by employing the above optimized method and produces good results in productive practice.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第2期439-447,共9页
Journal of Central South University:Science and Technology
基金
国家重点研发计划项目(2016YFC0801408
2017YFC0804202)
国家自然科学基金资助项目(51574008
51674014)
深部煤矿采动响应与灾害防控安徽省重点实验室开放基金资助项目(KLDCMERDPC17107)~~
关键词
巨厚岩层
矿震
冲击地压
关键工作面
优化设计
super-thick strata
mine-quake
rock burst
key longwall panel
optimization design
