Design and study of strip paste backfill mining scheme
The recovery of stagnant resources in coal mines,especially the overlying coal resources under buildings,railways,and water bodies,as well as the liberation and recycling of corner coal,has become an urgent problem to be solved in China's coal mining indus-try.The strip paste filling mining technology,which has the advantages of less weathering of supporting pillars,low compression rate,low filling cost,wide applicability,and high extraction rate,is increasingly highlighting its technical and economic advantages in recovering"three underground"stagnant resources.In response to the problems faced in the design process of strip backfill mining,namely selec-tion of paste backfill method,stability design of strip backfill mining roof,and backfill mining process design,the strip backfill and fully-mechanized mining backfill was compared by using theoretical analysis,highlighting the flexible layout of the working face in strip back-fill mining.Using theoretical calculation and analysis methods such as ultimate strength theory,fixed support beam theory,Bieniawski formula combined with Hurst test and on-site strength conversion principle,the solutions for the design of backfill mining related param-eters were provided,such as strip mining size,strip support strength,and backfill body design strength.Based on on-site production ex-perience,the answers to the process flow of strip mining,strip support,and strip end isolation were provided,a solution for the design of strip paste backfill scheme was provided,too.
overburden coalstrip paste backfillend isolationmining plan
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维普
