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为了解决次生断层影响下断层保护煤柱留设的问题,运用数值模拟软件FLAC3D对不同倾角和主、次断层间距情况下断层保护煤柱留设宽度进行模拟分析,得出不同条件下的断层保护煤柱宽度留设。研究结果表明,主断层附近存在底板次生断层的情况下,底板连续性较差,在采动影响下底板易发生破坏,底板破坏区域容易和主断层连通,需留设较宽的保护煤柱;在断层倾角一定的情况下,在某一主、次断层间距内,次生断层对断层保护煤柱留设有较大影响,超出此距离后,次生断层对断层保护煤柱留设宽度影响较小,断层倾角越大,此距离越小。
In order to solve the problem of the remaining pillar of fault protection coal pillar under the influence of secondary faults, numerical simulation software FLAC3D was used to simulate and analyze the reserved width of pillar with different inclination and main and secondary fault spacing. The fault under different conditions Pillar width protection set aside. The results show that under the condition of the secondary fault near the main fault, the continuity of the bottom slab is poor and the bottom slab is prone to be destroyed under the influence of mining. The damaged area of the bottom slab is easy to communicate with the main fault, and a wider protective pillar ; In the case of a certain dip of faults, within a certain primary and secondary fault spacing, the secondary faults have a great influence on the pillar of fault protection; beyond this distance, the secondary faults leave the width of the fault for protection of coal pillar Less affected, the greater the fault dip, the smaller the distance.