高应力挡墙应对矿山水害的应用研究

Application Study of High Stress Retaining Wall to Deal with Mine Water Hazard

矿山井下闭采采场水的逐渐积累达到一定程度后,会在采场局部薄弱部位,破坏底柱、封堵人行、溜矿井,携带采场尾砂灌入出矿穿巷,出矿穿巷因未封堵或封堵强度达不到要求,将会出现透水事故。对此,为降低挡土墙无法阻隔水患而产生的不利影响,以工程实际为依托,针对支护形式、强度理论计算、FLAC3D软件模拟等条件进行封堵挡墙设计,确定采用弧形挡墙,充填挡墙厚度值0.6 m,重点受力部位强度增强,抵抗瞬时强度增加,挡墙周边采用延弧形切线方向布置圆钢,最大限度利用圆钢抗压强度。应用后表明封堵效果明显,验证了设计合理性。

The gradual accumulation of water in the closed stope under the mine will reach a certain level,and it will destroy the bottom pillar,blocked pedestrians,and slip the mine at the local weak parts of the stope,and will be used to carry the tailing sand of the stope into the mine ore.If it is not plugged or the plugging strength does not meet the requirements,a water penetration accident will occur.In this regard,in order to reduce the adverse impact of the retaining wall unable to block the flood,based on the actual project,the design of the blocking retaining wall was carried out according to the supporting form,strength theory calculation,FLAC3D software simulation and other conditions,and the arc retaining wall was determined to be used.The thickness value of the filling retaining wall is 0.6 m,the strength of the key force parts is increased,and the instantaneous strength is increased.The round steel is arranged around the retaining wall in the direction of the arc tangent to maximize the compressive strength of the round steel.After application,it is shown that the blocking effect is obvious,which verifies the rationality of the design.