Causes for rockburst and control of gob side entry in deep two soft coal seams
PAN Li-you1,2,CHEN Li-qiang3,ZHANG Ruo-xiang4
1. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China; 2. Mining Engineering of Research Institute, Shandong University of Science and Technology, Taian 271019, China; 3. College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266510, China; 4. Shandong Energy Longkou Mining Group Co. Ltd., Yantai 265700, China
Abstract：For the geological conditions of two soft coal seams, mechanical models for rockburst occurring in two soft coal seams. Mechanical analysis and field practice of these models show that the main causes for rockburst in deep two soft coal seams are the stress concentration and energy accumulation in the soft alluvium that is clamped in the upper force source layer and the lower stable layer, and the energy accumulated from mining activities which releases to crushing mitigation areas, causing instantaneous ejection of coal and rock blocks and forming the rock burst. Through the researches on stress, energy, material conditions and inducing factors for burst of deep two soft coal seams, the prevention measures for rockburst of block structure of the roof support structure such as transferring stress, maintaining the stability of chain pillars, strengthening coal side, and loosening working slope are formulated. Field practice is made so as to realize the safe and high-efficiency non-impact mining at working faces.
潘立友,陈理强,张若祥. 深部两软煤层沿空巷道冲击地压成因与防治研究[J]. 岩土工程学报, 2015, 37(8): 1484-1489.
PAN Li-you,CHEN Li-qiang,ZHANG Ruo-xiang. Causes for rockburst and control of gob side entry in deep two soft coal seams. Chinese J. Geot. Eng., 2015, 37(8): 1484-1489.
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