论文部分内容阅读
尾矿库改变放矿模式后,库区前缘干滩强度增强,但积水量增加,对坝体的渗流和静力稳定性产生了影响。对尾矿坝二级子坝和最终坝高断面进行渗流和静力稳定性计算,计算结果表明:坝体浸润线埋深较浅,坝体自由面较高,水力坡降最大值位于初期坝坡脚处,水从初期坝坝面溢出,可能发生流土或管涌;坝体水平位移小,最小主应力只在二级子坝局部位置为拉应力,对坝体稳定性影响不大;二级子坝静力稳定性安全系数比允许最小值略小,最终坝高坝体稳定性较强。坝体总体稳定性较强,建议采取坝体深部排水措施(如水平排水管、辐射井等),降低坝体的自由面,提高坝体稳定性。对二级子坝做好护坡,并采取相应措施增加库区浸润线埋深,保证坝体稳定运行。
After changing the ore draining mode, the strength of the dry beach in the front of the reservoir area increases, but the amount of water accumulation increases, which affects the seepage and static stability of the dam. The seepage and static stability of the secondary dam of the tailing dam and the ultimate dam section are calculated. The calculation results show that the depth of the dam infiltration line is shallow, the free surface of the dam body is higher, and the maximum value of the hydraulic slope falls in the initial dam At the foot of the slope, water may overflow from the initial dam surface and may flow into the soil or pipe. The horizontal displacement of the dam is small, and the minimum principal stress is only the tensile stress in the local position of the second-order sub-dam, which has little effect on the dam stability. The safety coefficient of the quasi-static stability of the sub-dams is slightly smaller than the allowable minimum value, and the dams of the dams are more stable in the end. The overall stability of the dam is very strong. It is suggested to adopt deep drainage measures (such as horizontal drainage pipes and radiation wells) to reduce the free surface of the dam and improve the stability of the dam. The secondary sub-dam is good for slope protection and corresponding measures are taken to increase the buried depth of the infiltration line in the reservoir area and ensure the stable operation of the dam.