王庄煤矿高应力综放面巷道围岩控制技术  

Surrounding Rock Control Technology of High Stress Fully Mechanized Caving Face in Wangzhuang Mine

作　　者：刘俊 LIU Jun(Wangzhuang Mine,Lu’an Environmental Protection and Energy Development Co.,Ltd.,Changzhi 046000,China)

机构地区：[1]山西潞安环保能源开发股份有限公司王庄煤矿,山西长治046000

出　　处：《山西煤炭》2023年第2期11-18,共8页Shanxi Coal

摘　　要：以王庄煤矿2202工作面9106回风顺槽高应力条件切顶卸压后留设窄煤柱为工程背景,基于煤岩体岩石力学实验,通过现场调研、理论分析及数值模拟相结合的研究方法,对深井高应力条件下回采巷道的联合控制技术进行研究。最终确定合理的切顶角度为30°,水力压裂长度为21 m,留设窄煤柱宽度为7.5 m时可以获得较好的留巷效果,实现资源回收和回采巷道掘进速率的最大化;在9105工作面运输顺槽切顶后,进行91062回风顺槽掘巷,采用十字布点法对巷道变形量进行检测,巷道顶底板及两帮的最大变形量分别为231 mm、198 mm,能够满足巷道使用需求。The engineering background is that the narrow coal pillars were set after roof cutting and pressure releasing under high stress in the No.9106 return air gateway of the No.2202 working face in Wangzhuang Mine.Based on the mechanics experiments of coal rock mass,the joint control technology of the mining roadway under high stress in deep wells was studied through a combination of field research,theoretical analysis,and numerical simulation.Finally,reasonable parameters were determined,including a roof cutting angle of 30°,hydraulic fracture length of 21 m,and narrow coal column width of 7.5 m,which can achieve a better retention effect and maximize the resource recovery and advancing rate.After cutting the roof of the transport gateway at the No.9105 working face,the deformation of No.91062 return air gateway was detected by the cross-point method.The maximum roof-and-floor and the two-side deformation are 231 mm and 198 mm respectively,which could meet the requirements of the roadway.

关 键 词：水力压裂 窄煤柱 数值模拟 高应力 

分 类 号：TD353[矿业工程—矿井建设]