深埋大断面软岩巷道锚网索支护在某矿的试验及应用

以某矿3采区运输下山深埋软岩大断面巷道为工程背景，开展了锚网索支护设计，并利用FLAC数值模拟分析了巷道围岩应力、位移、塑性区等特征及支护效果。数值模拟结果表明：锚网索支护时顶底板应力为0~16 MPa，两帮应力为16~24 MPa、应力峰值为24 MPa；顶底板和两帮变形量分别为110、31 mm；塑性区基本位于锚固区域内，围岩整体控制效果较好。现场试验监测结果表明，巷道顶底板和两帮变形量为117、54 mm，围岩整体变形量较小，支护效果良好，验证了支护设计的可靠性与数值计算的合理性。

The Test and Application of Bolt-mesh-anchor Support in Deep Buried Soft Rock Coal Roadway

The bolt-mesh-anchor support was designed with the engineering background of deep buried soft rock coal roadway in 3 mining area in a coal mine.Stress, displacement, plastic zone and supporting effect of surrounding rock of roadway were analyzed by FLAC numerical simulation. The results showed that with bolt-mesh-anchor support, the stress value of the roof and floor was from 0 MPa to 16 MPa, the stress value of sides was from 16 MPa to 24 MPa, the peak stress value was 24 MPa; the deformation of the roof and floor and two sides were respectively 110 mm and 31 mm, the plastic zone was basically located in the anchorage area, the overall control effect of roadway surrounding rock is remarkable. The field test results showed that the deformation of the roof and floor and two sides were respectively 117 mm and 54 mm, the overall deformation of surrounding rock was small and the supporting effect was good, the reliability of the support design and the rationality of numerical calculation were verified.