大采高工作面护巷煤柱合理宽度探讨

Discussion on Rational Width of Coal Pillars for Roadway Protection in Large-mining-height Working Face

为了科学的确定干河煤矿2-107工作面护巷煤柱的宽度,通过理论分析计算得到极限平衡理论、弹性核理论及载荷估算法三种算法下煤柱的理论宽度,综合确定18 m护巷煤柱的合理宽度,并运用UDEC软件验证该护巷煤柱宽度的合理性。现场应用结果表明:2-107工作面回采过程中18 m宽煤柱中部的弹性核宽度大于2倍采高,可保证该工作面的安全回采。

To scientifically determine the coal pillar width in 2-107 working face of Ganhe Colliery,the author obtains the theoretical coal pillar widths under the three algorithms of limit equilibrium theory,elastic core theory and load estimation method through theoretical analysis and calculation,and determines and verify the 18m-wide road protection pillar with UDEC software,whose field application results show that the width of the elastic core in the middle of the 18m-wide coal pillar during the mining process of the 2-107 working face is greater than 2 times the mining height,guaranteeing the safety mining at working face.