Gateside packwall design in solid backfill mining-A case study |
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| Affiliation: | 1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China;2. School of Mines, China University of Mining and Technology, Xuzhou 221116, China;3. Civil Engineering Department, Yancheng Institute of Technology, Yancheng 224051, China;1. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454003, China;2. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China;1. Universidade Federal do Rio de Janeiro, Instituto de Geociências, Departamento de Geologia, Av. Athos da Silveira Ramos, 274, Cidade Universitária (Ilha do Fundão), 21.941-916, Rio de Janeiro, RJ, Brazil;2. Universidade Federal do Rio de Janeiro, Museu Nacional, Departamento de Geologia e Paleontologia, Rio de Janeiro, RJ, Brazil;1. Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, China;2. Northern Engineering & Technology Corporation, MCC, Dalian 116000, China;3. China Nonferrous Metal Group, Fushun Hongtoushan Mining Co. Ltd., Fushun 113000, China |
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| Abstract: | Based upon characteristic movement features of the overlying strata in solid backfill mining and in-situ observations,an associated model representing a roadway support system has been developed.Based on the Winkler foundation and beam model,the current study presents a static analysis of the model,thus permitting acquisition of a theoretical formula pertaining to roof convergence.Through use of working face 6304-1(Jisan Colliery) as the research setting,the association between roof convergence magnitude and both packwall strength and width have been elucidated.Based upon observed conditions at the working face,realistic packwall parameters have been formulated,with numerical simulation results and field application results indicating that design parameters garnered from the developed formula successfully adapted to local geological movement and deformation.Accordingly,roadway deformation was shown to be within the permissible range,thus satisfying mine production requirements.The proposed method in the current study may give a design basis for pack design in the context of SBM under similar conditions. |
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| Keywords: | Packwall design Solid backfill mining Roof convergence Winkler foundation and beam model Numerical simulation |
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