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Characteristics and stability of slope movement response to underground mining of shallow coal seams away from gullies

查看全文 作　　者：Zhang [1,2]Dongsheng;Fan [2,3]Gangwei;Wang [2,3]Xufeng 高影响力作者 机构地区：[1]College of Geology and Exploration Engineering,Xinjiang University,Urumchi 830046,China;[2]School of Mines,China University of Mining&Technology,Xuzhou 221116,China;[3]State Key Laboratory of Coal Resource and Mine Safety,China University of Mining&Technology,Xuzhou 221008,China高影响力机构 出　　处：《International Journal of Mining Science and Technology》索引2012年第22卷第1期,共4页高影响力期刊 基　　金：Financial support for this work, provided by the Research Fund of the Fundamental Research Funds for the Central Universities of China University of Mining & Technology (No. 2010ZDP02B02);the State Key Laboratory of Coal Resources and Mine Safety (No. SKLCRSM08X2);the Jiangsu '333' High Qualified Talents, the National Natural Science Foundation of China (Nos. 50904063 and 51004101);the Scientific Research Foundation of China University of Mining & Technology (Nos. 2008A003 and 2009A001) 摘　　要：Underground pressure is abnormal during mining of shallow coal seams under gullies. We studied gully slope movements, subject to underground mining, with physical simulation and theoretical analysis. The rules disclose that the slope rock slides horizontally in response to mining in the direction of gullies and rotates reversely with the appearance of a polygon block in mining away from gullies. We focused our attention on the case of mining away from a gully. We built a mechanical model in terms of a polygon block hinged structure and investigated the variation of horizontal thrust and shear force at the hinged point in relation to the rotation angle under different fragmentations. The Sliding-Rotation instability conditions of the polygon block hinged structure are presented based on the analyses of sliding instability and rotation instability. These results can serve as a theoretical guide for roof control during mining away from gullies in a coalfield defined by gullies. 关 键 词：地下开采 不稳定 浅煤层 沟渠 响应特性 运动 距离 接缝
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