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某铜矿节理裂隙发育,矿体围岩极其破碎,需大量加固支护,优选超细水泥注浆工艺,采用正交设计试验方案,针对不同水灰比(W/C)及水泥浆/水玻璃体积比(C/S)开展了配合比优化室内试验和理论研究,提出满足注浆强度要求的最佳水灰比(W/C)、水泥浆/水玻璃体积比(C/S),并基于推荐注浆溶液配合比进行现场注浆试验,确定了注浆压力及扩散半径等参数,建成了注浆工艺系统。现场工业应用表明:按照推荐注浆材料配比及工艺施工,炮孔成孔率提高25%,采场顶板允许暴露面积增大了110 m2,采场中矿石滞留量减少了约10%,矿石回收率提高了23.3%,实现了加固矿体,提高炮孔成孔率,增大矿石回收率的目标。
A copper ore fissure develops and the orebody is extremely fragmented. Large amounts of reinforcement and support are required. The ultrafine cement grouting process is preferred. Orthogonal design test scheme is adopted. According to different water / cement ratio (W / C) and grout / water (W / C), C / S (volume ratio of cement / water glass) and the volume ratio of water to glass (C / S) Based on the grouting ratio of the recommended grouting solution, on-site grouting test was carried out, parameters such as grouting pressure and diffusion radius were determined, and a grouting process system was established. The field industrial application shows that according to the recommended ratio of grouting material and construction, the porosity of blast hole increases by 25%, the allowable exposed area of stope roof increases by 110 m2, and the stranded ore storages in stope can be reduced by about 10% The recovery rate increased by 23.3%, achieving the goal of strengthening the ore body, improving the hole-forming rate of the blast hole and increasing the ore recovery rate.