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Soft–strong supporting mechanism of gob-side entry retaining in deep coal seams threatened by rockburst

查看全文 作　　者：Ning [1]Jianguo;Wang [1]Jun;Liu [1]Xuesheng;Qian [1]Kun;Sun [1]Bi 高影响力作者 机构地区：[1]College of Mining and Safety Engineering, Shandong University of Science and Technology高影响力机构 出　　处：《International Journal of Mining Science and Technology》索引2014年第24卷第6期,共6页高影响力期刊 基　　金：supported by the National Basic Research Program of China (No. 2010CB226805);the Taishan Scholar Construction Project of Shandong Province, China;the National Natural Science Foundation of China (No. 51344009);the Research Award Fund for Outstanding Young Scientists of Shandong Province (No. BS2012NJ007);the Ground Pressure and Strata Control Innovative Team Fund of SDUST (No. 2010KYTD105);the Natural Science Foundation of Shandong Province (No. ZR2012EEZ002) 摘　　要：When gob-side entry retaining is implemented in deep coal seams threatened by rockburst, the cementbased supporting body beside roadway will bear greater roof pressure and strong impact load. Then the supporting body may easily deform and fail because of its low strength in the early stage. This paper established the roadside support mechanical model of gob-side entry retaining. Based on this model,we proposed and used the soft–strong supporting body as roadside support in the gob-side entry retaining. In the early stage of roof movement, the soft–strong supporting body has a better compressibility, which can not only relieve roof pressure and strong impact load, but also reduce the supporting resistance and prevent the supporting body from being crushed. In the later stage, with the increase of the strength of the supporting body, it can better support the overlying roof. The numerical simulation results and industrial test show that the soft–strong supporting body as roadside support can be better applied into the gob-side entry retaining in deep coal seams threatened by rockburst. 关 键 词：采空区侧 冲击地压 深部煤层 配套性 威胁 机制 冲击负荷 支撑体
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