煤矿深部巷道群穿灰岩推覆体水害超前治理技术  

Advance control of water hazard through limestone nappe in deep roadway group in coal mine

作　　者：邢茂林 XING Maolin(CCTEC Xi'an Research Institute(Group),Xi'an 710077,China;Shaanxi Key Laboratory of Prevention and Control Technology for Coal Mine Water Hazard,Xi'an 710077,China)

机构地区：[1]中煤科工西安研究院(集团)有限公司,陕西西安710077 [2]陕西省煤矿水害防治技术重点实验室,陕西西安710077

出　　处：《煤炭工程》2023年第2期81-85,共5页Coal Engineering

基　　金：国家重点研发计划资助项目(2017YFC0804100)。

摘　　要：煤矿深部巷道高水压和高地应力下掘进,水害和破碎围岩是面临的主要水文和工程地质问题,以淮北邹庄煤矿87采区系统大巷群穿推覆体高压灰岩含水层和F25断层为研究对象,提出利用地面定向多分支孔顺巷探查和分段高压注浆技术,对巷道群穿含水层和断层破碎带进行超前区域治理。查明了太原组灰岩和断层破碎带的空间位置和形态。通过分段高压注浆在巷道周边形成了隔水圈带,含水层有效改造范围大于30m,改造后验证钻孔出水率降低约50%,单孔最大涌水量小于2m^(3)/h。高压劈裂注浆固结了断层破碎岩体,巷道在断层带掘进未发生片帮、掉顶,采用锚喷支护即顺利穿过。地面定向多分支孔注浆技术是解决深埋巷道掘进面临的破碎围岩和水害问题的有效手段,实现了由井下治理到地面治理,边掘边治到掘前治理,逐段治理到区域治理的治灾理念转变,可广泛应用在巷道穿深大断裂或高承压含水层的超前治理。Water disasters and broken surrounding rock are the main hydrology and engineering geological problems faced by deep roadway excavation under high water pressure and high in-situ stress.Taking the 87 mining area of Zouzhuang Coal Mine in Huaibei as the research object, directional multi-branch borehole along roadway exploration and subsection high pressure grouting technology were proposed to treat roadway group passing through aquifer and fault fracture zone.The spatial location and morphology of the Taiyuan Formation limestone and fault fracture zone were identified.A water-repellent zone was formed around the roadway through segmented high-pressure grouting, and the effective treatment range of the aquifer was beyond 30m. After the treatment, water yield of the verified drilling hole declined about 50%, and the maximum water inflow of a single hole was within 2m^(3)/h. High pressure split grouting consolidated the fault-broken rock mass, the shotcrete and bolt support was used to pass through the fault zone, without rib spalling and roof falling. Directional multi-branch hole grouting technology is an effective means to solve the problems of broken surrounding rock and water damage faced by deep roadway excavation. The concept of disaster control has been transformed from underground treatment to surface treatment, from treatment while digging to treatment before digging, and from section to region. It has a wide application prospect in the field of advance treatment of roadway penetrating large fracture or high confined aquifer.

关 键 词：深部巷道 地面定向孔 超前治理 高承压灰岩水 断层破碎带 推覆体 

分 类 号：TD741[矿业工程—矿井通风与安全]