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我矿系缓倾斜中厚矿床。自1964年以来,为寻求合适的采矿方法,先后试验了全面采矿法、分段崩落法、房柱采矿法、底盘漏斗采矿法。但由于当时对矿床规律认识不足,凿岩爆破参数选择不当等原因,造成顶板不易管理,安全条件差,损失贫化大,劳动生产率低等问题,各次试验均未达到预期效果。在此基础上,不断总结经验,反复实验,逐步形成了一种比较适合目前技术条件的环形阶梯式底盘漏斗采矿法。该采矿法已在我矿逐步推广,在三道沟坑口已全面使用,在三坪坑口也已部分使用。比空场法生产能力提高50％,为本矿开采缓倾斜中厚矿体初步探索到较为合理的途径。
I mine gently inclined thick deposits. Since 1964, in order to seek suitable mining methods, it has tested the comprehensive mining method, subsided caving method, post mining method and chassis funnel mining method. However, due to the lack of understanding of the law of deposit and the improper selection of parameters for drilling and blasting at that time, the tests failed to achieve the expected results due to problems such as unsmooth roofing, poor safety conditions, large loss and depletion, and low labor productivity. On this basis, continue to sum up experience, repeated experiments, and gradually formed a more suitable for the current technical conditions of the annular ladder funnel mining method. The mining law has been gradually promoted in mine, fully utilized at Sandou ditch and partly used at the mouth of Sanping mine. Which is 50% higher than the production capacity of the open field method, which is a reasonable way for the exploration of gently inclined moderately thick ore body in this mine.