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Influence of backfilling rate on the stability of the'backfilling bodyimmediate roof'cooperative bearing structure

查看全文 作　　者：Xianjie [1,2,3,4,5]Du;Guorui [1,2,3]Feng;Min [3,6]Zhang;Zehua [1,3]Wang;Wenhao [1,3]Liu 高影响力作者 机构地区：[1]College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China;[2]Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering,Taiyuan 030024,China;[3]Key Laboratory of Shanxi Province for Mine Rock Strata Control and Disaster Prevention,Taiyuan 030024,China;[4]State Key Laboratory for GeoMechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China;[5]Zhengzhou Coal Industry(Group)Co,Ltd,Zhengzhou 450007,China;[6]College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China高影响力机构 出　　处：《International Journal of Mining Science and Technology》索引2022年第32卷第6期,共10页高影响力期刊 基　　金：supported by the Youth Funds of National Natural Science Foundation of China(No.52004173);the Distinguished Youth Funds of National Natural Science Foundation of China(No.51925402);the Science and Technology Innovation Project of Colleges and Universities in Shanxi Province(No.2020L0066);the China Postdoctoral Science Foundation(No.2022M712922);the Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering(Nos.2021SX-TD001 and 2022SXTD008). 摘　　要：To reduce the cost of backfilling coal mining and utilize the underground space of coal mines,a new backfilling mining method with low backfilling rate called constructional backfilling coal mining(CBCM)is proposed.The 'backfilling body-immediate roof' cooperative bearing structure of CBCM is analyzed by establishing the model of the medium thick plate on an elastic foundation.The influence of the backfilling rate on the stability of overlying strata is analyzed by the numerical simulation experiment.The control effect of CBCM is verified by a physic similar simulation test.The economic benefit of CBCM is analyzed.The conclusions are:the deformation characteristics of the immediate roof and critical backfilling spacing in CBCM can be analyzed based on the Hu Haichang’s theory.Exerting the bearing capacity of the immediate roof is beneficial to the stability of the overlying strata.The CBCM has a good control effect on the overburden in Xinyang Mine when the backfilling rate is lower than 25%.The backfilling cost of per ton coal is 37.39 yuan/t when the backfilling rate is 13.7%,with a decrease rate of 56.63%than the full-filling.The research results can provide theoretical support for the application of CBCM in coal mining. 关 键 词：Constructional backfilling coal mining Immediate roof Cooperative bearing structure Medium thick plate on elastic foundation Backfilling rate Overlying strata
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