Study on mining stress distribution law and graded bearing pressure relief of strip working face
Wang Jinglun 1, Cheng Yunhai1, 3, Sun Penggong2, Gao Yang2
1. School of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, China;
2. Liangbaosi Energy Co., L., Jining 272404, China; 3. Mining Engineering Research Institute Shandong University
of Science and Technology, Tai’an 271200, China
In order to realize the safe and orderly production of rock burst mine, the research on the distribution law of mining stress was carried out. No.3314 strip working face of Liangbaosi Mine was taken as the engineering background, the numerical simulation was used to analyze the displacement field and stress field distribution cloud diagram of the overlying strata along the tendency at different mining distances of No. 3314 working face. Stress monitoring was used to analyze the correlation between vertical stress and vertical displacement of overlying strata during the evolution of spatial structure of strip coal pillar. The results showed that there was a positive correlation between the dynamic stress concentration degree of the strip coal column and the movement height of the overlying rock space. The lower the movement height of the overlying rock space, the lower the dynamic stress concentration degreed, and vice versa. When the movement height of the overlying rock space was stable, the dynamic stress peak also reached the maximum value. In the process of recovering the remaining strip coal pillar in the working face, the lateral abutment pressure of the working face on both sides was transferred to the strip coal pillar, and the stress level reaches or exceeded the stress condition of rock burst, and the risk of rock burst was high. The ' double-layer drilling ' technology was proposed to form the pressure relief mode of ' graded bearing ' and ' fractional transfer '.
王经论1，成云海1,3，孙鹏宫2，高 阳2. 条带工作面采动应力分布规律及分级承载卸压研究[J]. 煤炭与化工, 2024, 47(11): 9-15.
Wang Jinglun 1, Cheng Yunhai1, 3, Sun Penggong2, Gao Yang2. Study on mining stress distribution law and graded bearing pressure relief of strip working face. CCI, 2024, 47(11): 9-15.
