采动裂隙场梯形台分布特征数值模拟研究

Numerical simulation study on distributing characteristic of trapezoid stage in mining-induced fracture zone

采动裂隙是卸压瓦斯运移的主要通道,采动裂隙场分布特征是瓦斯抽采治理的核心基础。为了研究采动空间内裂隙场分布特征,以义煤集团新安煤矿为工程背景,采用理论分析、UDEC数值模拟的研究方法,分别分析垂直方向、走向方向、倾向方向采动裂隙分布特征,印证了采动裂隙场呈现梯形台的分布形态,得出了梯形台裂隙空间范围,可为卸压瓦斯抽采钻孔的布置提供参考依据。

Mining-induced fracture is the main channel of gas delivery,its distribution characteristics is the core foundation of the gas extraction governance. In order to study the space distribution characteristics of mining-induced fracture field,taking Xin＇an Coal Mine as engineering background, this paper analyzed the mining-induced fracture distribution characteristics of the direction of the vertical di- rection,the strike direction and the dip direction by the methods of theoretical analysis and UDEC numerical simulation,it confirms that the mining-induced fracture field presents the distribution characteristics of ＂ trapezoid stage＂ , at the same time, it was concluded the range of fracture-zone of ＂trapezoid stage＂ ,which has provided a reference basis for the drilling arrangement of pressure relief gas ex- traction.