地堑状断层防水煤岩柱体塑性区宽度研究

煤系地层中断层带常常以地堑、阶梯状等形式出现,为研究地堑状断层组防水煤岩柱体塑性区宽度,以淮南矿区刘庄煤矿地堑状断层组为研究对象,基于工作面导水断裂带发育规律,提出地堑状断层梯形防水煤岩柱体稳定性结构力学模型,根据梯形煤岩柱体内局部岩体受力情况及其几何特征,推导出地堑状断层防水煤岩柱塑性区破坏宽度计算公式,并针对刘庄煤矿内F19断层与F19-7断层组成的地堑状断层组,通过理论分析和数值模拟,计算了地堑状断层防水煤岩柱塑性区宽度,进一步验证了理论分析的正确性。

Study on Width of Plastic Zone of Waterproof Coal-rock Pillar of Graben Faults

Fault zones often appear as graben and ladder in the strata, in order to study the width of plastic zone of water proof coal-rock pillar of graben faults, taking the graben faults in Liuzhuang Coal Mine in Huainan Mining Area as the research object,based on the development laws of the height of fractured water-conducting zone, mechanical model of stability of trapezoidal waterproof coal-rock pillar of graben faults is innovatively proposed. According to the stress and its geometric characteristics of local rock mass in trapezoidal coal-rock column, the formula for calculating the failure width of plastic zone of waterproof coal-rock pillar of graben faults is deduced, and F19 and F19-7 graben faults in Liuzhuang Coal Mine in Huainan Mining Area is studied.Through theoretical analysis and numerical simulation, the width of the plastic zone of waterproof coal-rock pillar of graben faults is calculated to further verify the correctness of the theoretical analysis.