倾斜煤层回采巷道围岩变形特征及控制技术优化研究  

Research on Deformation Characteristics and Control Technology Optimization of Roadway Surrounding Rocks in Inclined Coal Seam Mining

作　　者：王成帅 姚辉苗[3] WANG Chengshuai;YAO Miaohui(Shanxi Vocational Institute of Energy(Shanxi Energy Staff Education Center),Taiyuan,Shanxi 030012,China;School of Energy and Mining Engineering,China University of Mining and technology-Beijing,Beijing 100083,China;Shanxi Conservancy Technical Institute,Taiyuan,Shanxi 030012,China)

机构地区：[1]山西省能源职业学校(山西省能源职工教育中心),山西太原030012 [2]中国矿业大学(北京)能源与矿业学院,北京100083 [3]山西水利职业技术学院,山西太原030032

出　　处：《矿业研究与开发》2024年第7期174-181,共8页Mining Research and Development

基　　金：山西省应用基础研究计划项目(202103021223093)。

摘　　要：针对倾斜煤层回采巷道产生非对称大变形问题,以昌兴煤矿1183工作面回采巷道为例,对巷道超前工作面20 m处围岩破碎情况进行窥视成像,确定其松动圈,并建立数值模型分析工作面回采扰动对回采巷道的影响范围,研究了巷道围岩应力演化规律和巷道围岩变形特征,结果表明:在距离回采工作面30 m范围内,回采巷道变形量较大,为回采扰动剧烈影响区,随着距回采工作面的距离增加,回采巷道受到回采扰动的影响减小;为了更好地控制巷道变形,提出锚杆-锚索-锚网联合支护为主,辅以注浆加固、“以顶拉帮、以底控帮”的围岩联合控制方案,注浆加固围岩可以提高其完整性,在巷帮以一定角度向顶板或底板打入锚杆可以提高巷道围岩整体性。实践表明,联合支护方案可以有效解决倾斜煤层回采巷道受回采强扰动而产生大变形的问题。In response to the problem of asymmetric large deformation in the inclined coal seam mining roadway,taking the 1183 working face of Changxing Coal Mine as an example,the surrounding rock fragmentation at a 20 m advanced the working face of the roadway was observed,and its loose circle was determined.A numerical model was established to analyze the impact range of mining disturbance on the mining roadway and the stress evolution law and the deformation characteristics of the roadway surrounding rocks were studied.The results show that within a range of 30 m from the mining face,the deformation of the mining roadway is relatively large,which is a severely affected area of mining disturbance.As the distance from the mining face increases,the impact of mining disturbance on the mining roadway decreases.In order to control the deformation of the roadway,a joint support scheme was proposed for the surrounding rocks,consisting of anchor rods,anchor cables,and mesh,supplemented by grouting reinforcement and"roof pulling and floor controlling".Grouting reinforcement can improve the integrity of the surrounding rocks,and injecting anchor rods at a certain angle to the roof or floor of the roadway can improve the overall integrity of the surrounding rocks.Practice has shown that the combined support scheme can effectively solve the problem of large deformation of mining roadway in inclined coal seam under strong mining disturbance.

关 键 词：倾斜煤层 围岩变形控制 松动圈 数值模拟 

分 类 号：TD353[矿业工程—矿井建设] TD327