Study on floor failure law of large buried depth gently inclined thick coal seam based on microseismic monitoring
Li Xinwang1,2,3, Hao Yunde1, Cheng Lichao1,2,3, Lu Bing1
1. School of Mining Geomatics Engineering, Hebei University of Engineering, Handan 056038, China; 2. Coal Resources Development and Construcyion Application Technology Research Center of Universities in Hebei Province, Hebei University of Engineering, Handan 056038, China; 3. Handan Coal-based Solid Waste Scale Utilization Technology Innovation Center, Hebei University of Engineering, Handan 056038, China
Abstract： Based on the background of Jiulong Mine, the long-term dynamic real-time monitoring of the No.15249S Face of the mine was carried out by using the microseismic monitoring technology. The correlation analysis of floor microseismic events frequency, cumulative energy, advancing distance and failure depth was carried out. The spatial distribution characteristics of the floor failure zone were revealed, and the failure depth and failure range of the floor were determined. The results showed that the microseismic events were mainly weak and near coal seam, the number of floor events was greater than that of roof events, and the number of floor events of upper roadway was greater than that of lower roadway. Affected by mining disturbance, the damage degree of the floor of No.15249S Face gradually deepened, and finally two failure zones were formed, which were distributed in the influence of ' inverted double peak ' along the strike. The failure depth of floor was generally positively correlated with frequency and cumulative energy of microseismic events. The maximum failure depth of the floor was 25 m, and there was no risk of water outburst. The research results provided support for the on-site safety production of Jiulong Mine and provided reference for the mining of similar large buried depth and gently inclined coal seams.
李新旺1，2，3，郝云德1，程立朝1，2，3，路 滨1. 基于微震监测的大埋深缓倾斜厚煤层底板破坏规律研究[J]. 煤炭与化工, 2023, 46(8): 38-43.
Li Xinwang1,2,3, Hao Yunde1, Cheng Lichao1,2,3, Lu Bing1. Study on floor failure law of large buried depth gently inclined thick coal seam based on microseismic monitoring. CCI, 2023, 46(8): 38-43.
