煤矿沿空掘巷巷旁支护体参数设计

Mine Parameters Design of Roadside Supporting in Full Driving Along Next Goaf

国家《防治煤与瓦斯突出规定》中规定"突出矿井开采保护层时,采空区内不得留有煤岩柱"。铁法大隆煤矿二水平13#煤已定为煤与瓦斯突出煤层,现正开采作为保护层的上覆煤层12#煤。为了在12#煤中实现无煤柱开采,设计在该煤层采用完全沿空掘巷技术。根据岩梁倾斜理论,确定巷旁支护阻力2860kN/m,煤壁下沉量0.4725m,选取落叶松木直径为22cm,高度240cm,每米巷道支护10根。该方案成功避免了应力集中,解决了该矿沿空掘巷巷旁支护问题,提高了煤炭采出率,创造了良好的经济效益。

The national rule of ＂Coal and Gas Outburst Prevention and Control Regulations＂ regulates： Coal-rock pillars shall not be retained in the goal when exploiting outburst mining the protective layer. Tiefa Dalong mine No, 13 coal layer has been identified as the outburst layer, and the upper protective layer No. 12 coal layer is being exploited. In order to exploit without coal-rock pillars, Tiefa Dalong mine is designed using the scheme of full driving along next goal. Based on the tilting rock beam theory, the laneway rib deflection of stope laneway and roadside supporting resistance can be calculated, so that the supporting scheme of timber wall has been proposed and successfully resolved the problem of roadside supporting. This scheme promotes the coal recovery rate and creates the great eeonomie benefit.