粉煤灰在煤矿软岩巷道支护中的应用技术

Applied technology of fly ash to mine gateway support in soft rocks

为了综合利用粉煤灰,降低软岩巷道锚注支护的成本,就粉煤灰在煤矿软岩巷道支护中的应用技术进行了研究,采用水泥与粉煤灰体积比为1∶1的注浆材料代替纯水泥浆来改进锚注支护中的注浆材料。应用粉煤灰对火烧铺矿围岩进行了加固,并对经粉煤灰加固后的巷道围岩进行了实地开挖观察发现,巷道的收敛变形情况和巷道围岩凝结情况均达到了用纯水泥作注浆材料的加固支护效果,巷道维修周期与单纯的锚网和架棚相比可延长6倍以上,取得了较好的技术经济效果。

In order to comprehensively utilize the fly ash and to reduce the cost of the gateway bolt and grouting support in soft rocks, the paper studied the applied technology of fly ash to mine gateway support in soft rocks.A grouting material with 1∶1 mixing rate of cement and fly ash was replaced to the pure cement grout in order to reform the grouting material for the bolt and grouting support.Fly ash was applied to reinforce the surrounding rocks in Huoshaopu Mine.After the fly ash applied to the reinforcement...