Engineering Practices Of Anchoring And Grouting Integrated Technology Of Large Diameter Cable Bolt For Roadway Floor Treatment Of Panel Roadways In Panyi Coal Mine

With the rapid development on economy and society in China,the mining of coal resources is increasing,the depletion of coal in the upper strata,the depth of coal mining is gradually deepening,and the difficulty of coal mining brings challenges to the mining of Shenjing coal mine.In Huainan coal field,the problems of deep mining depth,low property of deep grounds,geological settings and tectonic stress field have emerged.Above mentioned problems have resulted in roadway roof collapse,lateral wall slabbing and floor upheaving hazards.With the progress on roadway supporting,and the application of high strength rock bolt,cable bolt,collapse and slabbing had been resolved.While the problems of floor upheaving still threaten the roadway stability due to the roadway floors are barely supported.Floor upheaving induced accidence such as surrounding rock instability,deformation of railway and train digression occurred frequently.Obtaining damage and deformation characters of roadway floor,revealing mechanism of floor upheaving,proposing floor upheaving treatment measure and establishing prevention controlling treating technique system had become critical technical issues of coal mine safety.The paper takes roadway floor upheaving treatment of Panyi east coal mine as engineering background.Based on engineering characters of deep ground,weak rocks,intensive fractures and complex ground stress field,the theoretical analysis+ computer simulation+in-situ monitoring were conducted,roadway convergence behavior had been studied,the key elements of surrounding damage and deformation,as well as roadway floor upheaving had been analyzed.Moreover,the upheaving mechanism had been revealed.Research results provide theoretical and scientific bases for roadway supporting and floor upheaving treatment.Through above mentioned researches,the theoretical and technical system of floor upheaving treatment had been established and they are able to provide bases for further researches.Moreover,the research works were conducted parallel with in-situ practices.In addition,relative researches played significant role in engineering feasibility study and planning,and they were accepted and applied in following engineering practices.Figure [73] Table [8] Reference [73]...