玉溪煤矿1301工作面回风顺槽支护设计研究

Study on Design of Return Air Crossheading Support in 1301 Working Face of Yuxi Coal Mine

以室内力学试验和现场钻孔窥视试验,确定了玉溪煤矿1301工作面围岩的基本物理力学特性和围岩结构特征,提出在1301工作面回风顺槽采用"锚杆+锚索+金属网+钢筋梯子梁"的联合支护方案,并建立了有限元模型。考察结果表明,采用联合支护方案后,巷道最大应力集中区分布范围较小,且巷道垂直位移最大量约为350 mm,在可控范围内。

The basic physical and mechanical characteristics and structural characteristics of surrounding rock in the 1301 working face of Yuxi Coal Mine are determined by indoor mechanical test and field borehole peep test. The combined support scheme of "anchor cable metal mesh steel ladder beam" is adopted in the return air crossheading of the 1301 working face, and the finite element model is established. According to the results, the maximum stress concentration area of roadway is small, and the maximum vertical displacement of roadway is about 350 mm, in controllable range.