大采高工作面近距离双坚硬岩层强矿压控制研究  

Study on strong mine pressure control for high cutting working face under close distance double hard strata

作　　者：史久林 郑建伟 张震[1,2] 樊克松[1,2] 唐杰兵 SHI Jiu-lin;ZHENG Jian-wei;ZHANG Zhen;FAN Ke-song;TANG Jie-bing(Coal Mining Branch,China Coal Research Institute,Beijing 100013,China;Coal Mining and Designing Department,Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China)

机构地区：[1]煤炭科学研究总院开采研究分院,北京100013 [2]天地科技股份有限公司开采设计事业部,北京100013

出　　处：《煤炭工程》2020年第2期59-63,共5页Coal Engineering

摘　　要：针对大采高上覆近距离双坚硬岩层破断引起大采高工作面强矿压显现问题。以母杜柴登煤矿30201工作面为研究背景,通过对近距离双坚硬顶板岩层破断后的覆岩结构模型进行分析,认为大采高工作面近距离第I坚硬岩层是诱发工作面强矿压显现的关键。借助水力压裂技术处理第I坚硬岩层,控制其形成"悬臂"结构的悬露长度和完整性,不仅能够降低"悬臂梁"失稳时的能量等级,同时改变上位"铰接结构"失稳时动载荷的传力效应,从而达到降低工作面矿压显现强度的目的。采用微震监测技术对卸压效果进行检验,微震系统监测结果显示弱化处理后,工作面的微震能量和频次均大幅降低,表明卸压措施能有效控制工作面强矿压的显现。Aiming at the strong mine pressure behavior in high cutting working face caused by the close-distance overlying double hard strata fracturing,information in the 30201 working face of Muduchaideng Coal Mine is extracted,the structure model of broken strata is analyzed.It shows that the first hard strata is the key to induce strong pressure in the high cutting working face.Hydraulic fracturing technology is applied into the close-distance first hard rock strata,and the length and integrality of the"cantilever structure"is controlled,the static load grade of working face is reduced,and meanwhile the transmission way of the dynamic load is changed when the upper articulated structure is unstable,so as to reduce the degree of the strong pressure appearing in large mining height working face.The microseismic monitoring technology is used to check the effect of pressure relief.The microseismic system monitoring shows that the energy and frequency of microseismic vibration are greatly reduced after the above measures are taken,which indicates that the pressure relief measures are effective in weakening the strong mine pressure behavior in the working face.

关 键 词：大采高工作面 近距离 双坚硬岩层 微震监测 弱化强矿压 

分 类 号：TD323[矿业工程—矿井建设]