Different Position Weak Interlayers Impact Study On The Stability Of Roadway

When the tunnel roof contains a weak interlayer their support is very difficult, Roof prone to separation, poor stability, along with the increasing depth of mining, roadway support such becomes more difficult. When Lou Mine115110machine for any roadway to support the transformation of discovery,2.4m and5.8m at its roof has two weak interlayer, right in the anchor bolt and anchor the edge, it is carried out on two weak interlayer roadway Effects of the situation, the paper numerical simulation and field test a combination of methods, first obtain a series of parameters of rock and its classification through the rock laboratory tests BQ, rock quality evaluation, and to provide the necessary numerical simulation back mechanical parameters; FLAC3D use finite element simulation software to simulate the weak interlayer2anchor anchored inside edge, weak interlayer1external circumstances in the roadway anchorage area inside the anchorage zone edge, the outer anchorage zone a total of nine cases analyzed variation of surrounding rock displacement, stress and plastic zone of these nine simulation results through simulation found weak mezzanine roof very prone to separation, obtained weak interlayer in cable anchor bolt and the edge of the roadway when Stability maximum; summarizes the current roadway support methods, combined with some of the conclusions in the numerical simulation of the conclusions drawn, a set of specific weak interlayer roadway support program and the proposed support program for engineering In practice, testing the support program is reasonable, the observations show that the surrounding rock deformation to get better control, to achieve the desired objectives.