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我矿24号矿体原使用小中段崩落法回采,现在采用无底柱分段崩落法回采。在用小中段崩落法回采时,出矿溜井是指状溜井,即一条溜井上部有3～6条分支通往耙矿坑道。这些溜井及其分支大部份布置在矿体中间,或矿体边界线上。在改用无底柱分段崩落法后,这些溜井仍用作各水平的出矿溜井。因此,我们在回采中就经常遇到封闭溜井的问题。溜井口封闭质量不好,就会产生严重后果。24号矿体曾因溜井没有封住,采空场废石灌入溜井,造成几个主要生产水平停产达6个月之久。在生产实践中我们体会到,对溜井口封闭
Mine No. 24 ore mine using the original small middle caving method, now using subsea free-subsidence caving method. When using the small-medium-sized caving method, the ore-outing chute is the pointed chute, that is, there are 3 to 6 branches in the upper part of a chute leading to the harrow pit. Most of these chutes and their branches are arranged in the middle of ore bodies or on the boundary line of ore bodies. After switching to the subsea caving method, these slippery wells are still used as ore tapping shafts of all levels. Therefore, we often encounter the problem of closed chutes in the mining. Sliding wellhead closed poor quality, it will have serious consequences. No. 24 ore body has not been closed due to slippery well, mining waste rock poured into the runway, resulting in several major production levels discontinued for 6 months. In production practice we realize that the slip of the wellhead closed