沿空掘巷中煤柱留设宽度的研究

Research on Width of Isolating Coal Pillar in Gob-side Entry Driving

为确定沿空掘巷中护巷煤柱合理的宽度,以某矿1111工作面沿空巷道为工程背景,通过极限平衡理论结合三维有限差分FLAC3D软件对不同护巷煤柱宽度条件下的巷道稳定性进行了分析。分析结果表明,沿空掘巷中的合理护巷煤柱宽度为5～7 m。将该结果应用到1111工作面运输巷,掘进和回采期间对巷道变形的实时监测结果表明,巷道维护状况良好。

To determine the reasonable coal pillar width in gob-side entry driving, taking the roadways along the goaf on 1111 working face in a coal mine as background,through the combination of limit equilibrium theory and three-dimensional finite-difference FLAC^3D software, the stability of roadway was analysed under conditions of different coal pillar width. The results show that the reasonable coal pillar width in gob-side entry driving is 5 - 7 m. The results were applied into headentry on 1111 working face, and roadway maintenance is in good condition through real time monitoring of roadway deformation in the process of excavation and coal winning.