杨庄煤矿封闭不良钻孔治理技术应用  

Application of Technology for Poor-sealed Borehole Treatment in Yangzhuang Coal Mine

作　　者：李杨 郑士田 王琦 刘泽威 LI Yang;ZHENG Shitian;WANG Qi;LIU Zewei(CCTEG Xi'an Research Institute(Group)Co.,Ltd.,Xi'an 710054,China;Shaanxi Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology,Xi'an 710054,China)

机构地区：[1]中煤科工西安研究院(集团)有限公司,西安710054 [2]陕西省煤矿水害防治技术重点实验室,西安710054

出　　处：《煤炭技术》2022年第12期124-127,共4页Coal Technology

基　　金：国家重点研发计划资助项目(2017YFC0804102)。

摘　　要：受采掘活动影响,杨庄煤矿Ⅲ610机巷放1孔组各钻孔套管封闭受到破坏,底板存在突水风险。为消除水害隐患,分析了煤层底板太原组上段灰岩含水层之间关系及各含水层富水性,统计了各含水层涌水量情况,选取治理关键层位,最终决定采用地面定向钻高压注浆治理技术针对性治理封闭不良钻孔水害问题。通过地面定向钻探、高压注浆组合工艺的实施,使放水孔孔底位置灰岩含水层岩溶裂隙得到充填加固,彻底切断导水通道,阻隔出水水源,总涌水量由350 m3/h逐步衰减至4 m3/h,堵水率达到99%,彻底根治了封闭不良钻孔水害问题,治理效果显著。After the mining activities,the closure of the Yangzhuang coal mine III610 working face conveyor roadway No.1 borehole group casing was damaged,causing the risk of water inrush on the seam floor.In order to eliminate the hidden peril of water damage,the relationship and water abundance of the limestone in upper section of Taiyuan formation were calculated,the controlling key-level was selected,and finally decided to use the ground directional drilling grouting technology to treat the water damage of poor-sealed borehole.Through the implementation of ground directional drilling and high pressure grouting combined process,the limestone aquifer karst fissures at the bottom of the poorsealed borehole were filled and reinforced,the water flowing channels were completely cut off,the water source was blocked,and the total water inflow gradually decreased from 350 m~3/h to 4 m~3/h,water blocking rate reaching to 99%,the problem of water damage in poor-sealed boreholes has been completely eradicated,and the treatment effect is remarkable.

关 键 词：封闭不良钻孔 地面定向钻探 高压注浆 

分 类 号：TD745[矿业工程—矿井通风与安全]