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

作　　者：Zhang Dongsheng Fan Gangwei Wang Xufeng 

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

出　　处：《International Journal of Mining Science and Technology》2012年第1期47-50,共4页矿业科学技术学报（英文版）

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.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：Shallow coal seam Mining away from gullies Polygon block hinged structure Sliding instability Rotation instability 

分 类 号：TD853[矿业工程—金属矿开采] TD327.2[矿业工程—矿山开采]