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运用FLAC~(3D)软件对赵庄二号井的DF5断层的防水煤柱进行了数值模拟研究。通过留设不同宽度的保护煤柱,分析煤系煤层周围及断层附近塑性区及最小主应力变化情况,得出了断层煤柱的合理留设宽度,3~#煤层临近断层开采时,留设60 m的防水煤柱是可靠的。
The FLAC 3D software is used to simulate the coal pillar of DF5 fault in Zhaozhuang No.2 well. By setting up protective pillar with different widths, the change of plastic zone and the minimum principal stress around coal seam and fault are analyzed, and the reasonable reserved width of fault pillars is obtained. When the coal seam of No. 3 to No. 60 m waterproof pillars are reliable.