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- W2364192131 abstract "Because of the load of the overlying alluvium can be passed by aquifers,collapse of sand and water inrush accident happens easily on burst face when people are mining under thick and unconsolidated aquifers.In order to avoid collapse of sand and water inrush accident occurred in the mining process,the project should combine the actual conditions of 864 in Zhuxianzhuang coal mine working face and establish mechanical models of composite riser critical layer.The numerical simulation for thick coal seam under thick and unconsolidated aquifer respectively is 2.5,3.0, 3.5,4.0 m mechanized mining in the up stratified,6.5,6.0,5.5,5.0 m fully mechanized caving under the hierarchical and one - time full - thickness caving exploitation.The safety of mining programmes must be determined.Research results show that the situation of minimum crack development height,the most ease eventually forms on overburden failure and the safest about mine working face will appear when the numerical simulation is 3.0 m mechanized mining in the up stratified,6.0 m fully mechanized caving under the hierarchical." @default.
- W2364192131 created "2016-06-24" @default.
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- W2364192131 date "2012-01-01" @default.
- W2364192131 modified "2023-09-22" @default.
- W2364192131 title "Failure overburden law analysis of the repeated mining under the thick unconsolidated aquifers" @default.
- W2364192131 hasPublicationYear "2012" @default.
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