下霍煤矿2308运输顺槽支护优化及应用研究

Support Optimization and Application Research of the 2308 Transportation Trough in Xiahuo Coal Mine

下霍煤矿2308运输顺槽掘进初期矿压显现剧烈,顶底板及两帮位移量较大。根据地质条件、理论计算、钻孔窥视、工程实践经验,对2308运输顺槽支护参数进行优化。监测结果表明,优化后巷道顶底板、两帮最大移近量为188 mm、159 mm,围岩变形量较小,支护参数优化设计合理有效。

At the initial stage of excavation along the 2308 transportation trough in Xiahuo Coal Mine,the mine pressure shows intense behavior,and the displacement amount of the roof,floor,and two sides is relatively large.Based on geological conditions,theoretical calculations,borehole observation,and engineering practice experience,optimize the support parameters of the 2308 transportation trough.The monitoring results indicate that after optimization,the maximum displacement amount of the roof,floor,and two sides of the roadway is 188 mm and 159 mm,and the deformation amount of the surrounding rock is relatively small.The optimization design of support parameters is reasonable and effective.