F14断层保护煤柱宽度数值模拟研究
Numerical simulation on width of protective coal pillar for F14 fault
摘要
以山东某矿 1309 工作面邻近 F14正断层开采为背景,采用 Mohr-Coulomb 判据和FLAC3D 数值模拟方法,研究 5、10、20、30、40 m 保护煤柱条件下采动应力、位移及塑性区演化规律.结果表明:煤柱宽度由 5m增至20 m 后,断层侧应力集中和塑性扩展明显收敛,工作面与断层之间形成较稳定缓冲带;40 m方案扰动范围进一步减小,安全储备更高.数值结果显示,导水裂隙带高度56.83～75.84 m,冒落带高度14.49～22.83 m,未表现出向F14 断层贯通趋势.综合断层活化判据、应力-位移响应和塑性区发育特征,认为 20 m 保护煤柱已能满足断层活化控制要求,40 m 可作为更保守的安全方案.
Taking the 1309 working face adjacent to the F14 normal fault in a coal mine in Shandong as the engineering background,the width of protective coal pillar was studied using the Mohr-Coulomb criterion and FLAC3D numerical simulation.Five schemes with pillar widths of 5,10,20,30 and 40 m were compared in terms of stress,displacement and plastic zone evolution.The results show that when the pillar width is increaseedfrom 5 m to 20 m,stress concentration and plastic expansion near the fault are significantly reduced,and a stable buffer zone is formed between the working face and the fault.The 40 m scheme further weakens mining disturbance and provides a higher safety reserve.The simulated height of the water-conducting fractured zone is 56.83-75.84 m,and the caving zone height is 14.49-22.83 m.Considering the fault activation criterion and numerical responses,the reasonable pillar width is determined as 20 m,while 40 m can be used as a conservative scheme.
年，卷(期)：
2026, 45(10)
分类号：
TD745
TD823
机标分类号：
TD325
TD822+.2
TD263.4
在线出版日期：
2026年10月29日
