STUDY OF STRATA PRESSURE BEHAVIORS WITH LONGWALL MINING IN LARGE INCLINATION AND THICK COAL SEAM UNDER CLOSED DISTANCE MINED GOB
YANG Ke1，2，KONG Xiangyong1，2，LU Wei1，2，LIU Shuai1，2
(1. Key Laboratory of Coal Mine Safety and High-efficiency Mining Cosponsored by Anhui Province and Ministry of Education，Anhui University of Science and Technology，Huainan，Anhui 232001，China；2. Anhui Province Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mine，Anhui University of Science and Technology，Huainan， Anhui 232001，China)
Abstract：How to complement effectively ground control has been an important and difficult issue in multiple fully-mechanized longwall mining for closed distance coal seams. Patterns of abutment pressure distribution，characteristics of hydraulic support force and condition under mined gob with longwall retreat mining should be synthetically investigated in order to prevent roof accidents such as rib spalling，roof fall and hydraulic support damage. Taking the No.5 coal seam and No.4 coal seam of Panbei mine as the background，the characteristics abutment pressure and the plastic zone in front of coal wall were deduced from theoretical formula. The mining-induced stress development，peak value and its location were obtained in front and background of No.12124 longwall panel under mined gob using FLAC3D to simulate surrounding rock mechanical characteristics. The characteristics of working resistance，maximum resistance and distribution of hydraulic support had been observed and obtained. Researches results show that abutment pressure evolution superposition mechanism has been revealed under closed distance and mine gob in thick coal seam and large dip angle with fully mechanized longwall mining. Based on comprehensively analyzing，ground control countermeasures have been put forward to increase working resistance，to push roof metal-mesh，and to enhance face guard with individual prop. And effective applications were obtained.
杨 科1，2，孔祥勇1，2，陆 伟1，2，刘 帅1，2. 近距离采空区下大倾角厚煤层开采矿压显现规律研究[J]. 岩石力学与工程学报, 2015, 34(S2): 4278-4285.
YANG Ke1，2，KONG Xiangyong1，2，LU Wei1，2，LIU Shuai1，2. STUDY OF STRATA PRESSURE BEHAVIORS WITH LONGWALL MINING IN LARGE INCLINATION AND THICK COAL SEAM UNDER CLOSED DISTANCE MINED GOB. , 2015, 34(S2): 4278-4285.
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2015, Vol. 34 
