摘要
为减小煤炭井工开采对地表建(构)筑物的影响和破坏,以晋煤寺河矿5304工作面为研究对象,运用理论分析和数值模拟相结合的方法,分析覆岩关键层水力压裂控制工作面采动受影响范围,研究覆岩关键层水力压裂前后覆岩垮断形态及地表沉陷特征,揭示覆岩关键层对地表沉陷控制机制。结果表明:覆岩关键层水力压裂后,其移动形式由弯曲下沉转化为沿压裂区滑移切落,水力压裂区域地表下沉曲线变陡,下沉值增大,压裂侧地表采动影响范围减小。
In order to reduce impact and damage of coal mining on surface structures,with 5304 working face of Sihe Coal Mine,Jincheng Coal Mining as a research object,theoretical analysis and numerical simulation were conducted to analyze control of working face's mining influence by hydraulic fracturing in key strata.Then collapse mode of overburden and surface subsidence laws of key strata before and after hydraulic fracturing were studied,and its control mechanism on surface subsidence was revealed.The results show that after hydraulic fracturing,the movement mode is transformed from bending subsidence to sliding shear drop along fracturing zone.As surface subsidence curve in the hydraulic fracturing zone becomes steep,subsidence value will increase while influence scope of surface mining on fracturing side decreases.
作者
冯占杰
郭文兵
FENG Zhanjie;GUO Wenbing(School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo Henan 454000,China;Synergism Innovative Center of Coal Safety Production in Henan Province,Jiaozuo Henan 454000,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2019年第11期171-176,共6页
China Safety Science Journal
基金
国家自然科学基金资助(51774111)。
关键词
关键层移动模式
地表沉陷控制
采动影响
水力压裂
数值模拟
key strata movement mode
surface subsidence control
mining influence
hydraulic fracturing
numerical simulation
