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端部放矿的无底柱分段崩落法,由于具有结构简单、工作安全、适于机械化采矿等优点,自七十年代起在我国得到迅速推广。由于采矿法结构特点的限制,在使用中仍存在通风条件差、矿石损失贫化大和矿块生产能力不够高等问题。上述问题成了影响某些大型矿山不能达产的原因之一。引进大型柴油机拖动铲运机后,由于前述问题和管理工作跟不上,未能充分发挥设备效能,从而不能大幅度提高回采强度和取得应有的经济效果。
Because of its advantages of simple structure, safe operation and suitable for mechanized mining, the pillarless subsidence caving method with end-draining has been rapidly promoted in our country since the seventies. Due to the structural characteristics of the mining law, there are still problems of poor ventilation conditions, depleted ore losses and insufficient production capacity of ore blocks in use. The above problems have become one of the reasons that some large-scale mines can not reach production. After the introduction of large-scale diesel engine dragging scraper, due to the aforementioned problems and management can not keep up, failed to give full play to equipment performance, which can not significantly improve the recovery strength and achieve the desired economic results.