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留矿法在地下开采中有较广泛的应用,当遇到围岩构造复杂,节理裂隙发育或者围岩破碎时,采场内常出现片帮、冒落,矿石大块产出率急增。不仅采幅不易控制,贫化损失率高,而且作业安全也受到威协。文章介绍了在此情况下注浆加固围岩的办法。回采前在沿脉平巷内或天井中,对围岩破碎或裂隙地段,按一定距离布置注浆钻孔,把浆液注入围岩破碎裂隙中,把岩块固结起来,起到胶结充填作用。文章列举了用水泥-水玻璃浆液注浆的实例,这种浆液在
The ore retention method is widely used in underground mining. When the surrounding rock is complex in structure, fractured joints are developed or the surrounding rock is broken, there often appear sheet gangs in the stope, and the bulk yield of ore suddenly increases. Not only not easy to control the amplitude of the flaw, the rate of loss is high, and the safety of the work is also threatened. This article describes the method of grouting reinforced rock in this case. Before mining In the along the veins Lane or the courtyard, the surrounding rock crushing or fissure section, grouting holes arranged at a certain distance, the slurry into the surrounding rock crushing cracks, the rock solidification, play the role of cement filling . The article lists examples of grouting with cement-water glass slurries