深部巷道顶板抽冒诱发典型高势能突水溃砂灾害机理及治理  

Mechanism and salvage of sand-water mixture inrush induced by roof falling in deep coal roadway

作　　者：钱自卫[1] 隋旺华[1] 官云章 QIAN Ziwei;SUI Wanghua;GUAN Yunzhang(School of Resources and Earth Sciences,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Yankuang Energy Group Co.,LTD.,Zoucheng,Shandong 573500,China)

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]兖矿能源集团股份有限公司,山东邹城573500

出　　处：《中国矿业大学学报》2024年第5期915-924,共10页Journal of China University of Mining & Technology

基　　金：国家自然科学基金重点项目(42130706)。

摘　　要：山东万福煤矿埋深为880 m的回风斜巷在施工过程中发生严重突水溃砂灾害,最大水砂流量为1.458万m^(3)/h,总水砂体量为2.2万m^(3),井下2400 m巷道被淹,造成重大损失,是目前已知发生的深度最大的突水溃砂灾害.本文介绍了此次灾害发生的地质条件、发生过程,重点分析灾害发生机理,提出了次生灾害防治思路,制定了具体救援方案并实施.通过矿井主要含水层水位实时监测数据的变化、淤积水砂的取样测试及地质条件分析,快速确定了灾害发生机理为斜巷顶板持续抽冒沟通了埋深为750 m左右、水压超过7 MPa的新近系底部砂层所致.在灾害救援过程中,分析了次生灾害发生的可能性,采用井下注浆构筑安全挡墙的方式,有效防止了潜在的水砂复突次生灾害,保证了井下救援人员安全.采用地面定向钻孔,大体量注浆方式对水砂突涌通道进行了封堵、对水砂源进行了加固.本次灾害的发生及救援,可提高人们对深部地质灾害危害的认识,再次说明深地工程灾害防治过程中地质工作的重要性,也为高势能突水溃砂灾害防治提供借鉴.A serious sand-water mixture inrush occurred during the construction of a return air subinclined roadway buried 880munderground in the Wanfu Coal Mine,Shandong province,China.The maximum flow rate of sand-water mixture reached 14580m^(3)/h with a total mixture volume of 22000m^(3).The roadway network with a total length of 2400mwas flooded,causing a casualty and significant economic losses.That is the deepest sand-water mixture inrush disaster known until now.This work analyzes the mechanism of the disaster,proposes ideas for the prevention and control of the secondary disaster,and discusses the specific salvage plan that was conceived and implemented.Through monitoring of the water level of the main aquifer,sampling,and testing of silted water and sand,and the analysis of geological conditions,it was quickly determined that the main reason of the disaster was the sustained roof fall of the subinclined roadway,and the Neogene bottom sand aquifer with a burial depth of about 750mand a water pressure of over 7MPa was forced to connect.In the salvage,the possibility of secondary disasters was analyzed,a safety retaining bulkhead was constructed with underground grouting to effectively prevent secondary disasters of water and sand inrush again and to ensure the safety of underground salvage personnel.Directional drilling and mass grouting in the ground were used to block the pathway of sand-water mixture inrush and reinforce the sand auifer.This study can better the understanding of the importance of geological work in disaster prevention and control of deep underground engineering,which also provides a reference for the disaster prevention and control of sand-water mixture inrush with high potential energy.

关 键 词：深部矿井 冒顶 高势能 突水溃砂 灾害控制 

分 类 号：TD12[矿业工程—矿山地质测量]