确定合理的区段煤柱宽度及巷道支护型式和参数，对于提高资源回采率和巷道安全性及实现综放开采高产高效意义重大。以王家岭煤矿20103区段运输平巷为工程背景，采用FLAC3D数值分析了不同煤柱宽度下围岩主应力差、变形及破坏演化规律，认为合理煤柱宽度为6～10 m，并结合实际地质和生产条件确定试验巷道煤柱宽度为8 m。采用理论分析和现场钻孔窥视方法综合确定基本顶断裂线位于距采空区约7 m处，认为由于综放沿空巷道围岩性质结构和应力分布沿巷道中心线呈明显非对称性，将引发煤柱侧顶板严重下沉和肩角部位煤岩体错位、嵌入、台阶下沉等非对称破坏特征，靠煤柱侧顶板及肩角部位是巷道变形破坏的关键部位。在此研究基础上，针对性地提出了以高强锚梁网、不对称锚梁、锚索桁架为主体的综合控制技术，详细阐明了具体支护措施的控制机制，并进行现场应用。工程实践表明，8 m煤柱宽度合理，该支护技术能够保证窄煤柱沿空巷道围岩稳定，并已在王家岭煤矿大面积推广应用，对类似工程条件的支护技术具有一定的理论意义和实用价值。

To improve the coal recovery rate, it is crucial to properly determine the coal pillar size, supporting patterns and parameters of the roadway, since this can ensure the stable of butt entry with fully-mechanized mining. The evolution of principal stresses, deformation and failure are studied using FLAC3D with different pillar widths in haulage roadway 20103 of Wangjialing coal mine. It is shown that the most reasonable and economic pillar widths range from 6 m to 10 m. The final reasonable pillar width is determined to be 8 m based on the geological production conditions. Theoretical analysis and borehole observation show that the main roof breaks at 7 m next to the gob. The property and structure of the surrounding rock and the stress distribution are asymmetric along the axis of roadway, resulting in asymmetric roof strata behaviors including the subsidence of roof near the pillar and even the dislocation, embedding, step convergence of rock on the abutment of coal mine. The roof near the pillar and the abutment of coal mine are the key positions of deformation failure. A comprehensive supporting technology is proposed including high strength anchor-beam-net, asymmetric cable-beam and cable truss. The mechanism of supporting measures for surrounding rock is analyzed. It is shown that the pillar width with 8 m is reasonable and the proposed measure can control the asymmetric deformation failure. The proposed supporting measure has been successfully applied to Wangjialing mine area.