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杨增强, 刘畅, 刘思佳, 裴宗远, 舒通. 褶曲翼部区煤层倾角变化诱发冲击地压机理及其防治研究[J]. 矿业安全与环保, 2024, 51(2): 82-89. DOI: 10.19835/j.issn.1008-4495.20220593
引用本文: 杨增强, 刘畅, 刘思佳, 裴宗远, 舒通. 褶曲翼部区煤层倾角变化诱发冲击地压机理及其防治研究[J]. 矿业安全与环保, 2024, 51(2): 82-89. DOI: 10.19835/j.issn.1008-4495.20220593
YANG Zengqiang, LIU Chang, LIU Sijia, PEI Zongyuan, SHU Tong. Study on the mechanism and prevention of rock burst induced by inclination change of coal seam in fold wing area[J]. Mining Safety & Environmental Protection, 2024, 51(2): 82-89. DOI: 10.19835/j.issn.1008-4495.20220593
Citation: YANG Zengqiang, LIU Chang, LIU Sijia, PEI Zongyuan, SHU Tong. Study on the mechanism and prevention of rock burst induced by inclination change of coal seam in fold wing area[J]. Mining Safety & Environmental Protection, 2024, 51(2): 82-89. DOI: 10.19835/j.issn.1008-4495.20220593

褶曲翼部区煤层倾角变化诱发冲击地压机理及其防治研究

Study on the mechanism and prevention of rock burst induced by inclination change of coal seam in fold wing area

  • 摘要: 以宝积山煤矿七采区内褶曲翼部影响区为工程地质背景,采用现场调研统计、理论计算分析、数值模拟运算等方法,对开采煤层倾角变化诱冲机理进行研究,提出协同控制防治冲击地压方案并进行了现场工业性试验。结果表明:随着煤层倾角增大,煤柱侧内高集中静载呈现出逐渐增大的规律,实体煤侧内高集中静载呈现出逐渐减小的规律;在煤层倾角较小的条件下,厚硬关键层更容易在采空区两侧边界位置发生破断,诱使其悬空段中部区域瞬间发生破断进而形成扰动强度较大的远场应力扰动;关键块体B在煤层倾角较小且埋深较大的条件下极易发生回转失稳,进而形成扰动强度较小的近场应力扰动。该方法对于冲击地压的防治效果显著。

     

    Abstract: Based on the engineering geological background of the affected area of the inner fold wing in the seventh mining area of Baojishan Coal Mine, the mechanism of induced rock burst by inclination change of mining coal seam was studied through on-site statistic, theoretical calculation and numerical simulation. A collaborative control solution for preventing and controlling rock burst was proposed, and on-site industrial experiments were conducted. The results show that with the increase of coal seam inclination, the concentrated static stress in the coal pillar side gradually increase, while the concentrated static stress in the solid coal side gradually decrease. Under the condition of smaller inclination, the thick and hard key layer is more likely to break at the boundary on both sides of the goaf, which will induce the central area of its suspended section to break instantaneously and form a far-field stress disturbance with large disturbance intensity. Key block B is prone to rotate instability under the conditions of small coal seam inclination and large burial depth, leading to form a near-field stress disturbance with small disturbance intensity. The proposed method has a significant effect on the prevention and control of rock burst.

     

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