急倾斜极薄矿脉开采时,常遇到采矿方法难以确定、损失率贫化率高、作业空间狭小等问题.为研究适宜的采矿方法,以马子冲锰矿的急倾斜极薄矿脉为研究对象,结合矿山矿脉稳固性较好、底板稳固性次之、顶板稳固性最差的实际工程地质条件,提出采用削壁充填采矿法进行开采.同时进行了削壁厚度、采场结构参数、回采工艺方面的研究,针对顶板稳固性差的问题,提出先进行削壁、后进行矿石回采的回采顺序,有效提高了采矿安全性.最后通过试采,分析矿脉回采时的主要技术经济指标,如矿石损失率为8.37%,矿石贫化率为6.45%等,得出削壁充填法适合急倾斜极薄矿脉的开采,尤其适合马子冲锰矿矿脉的开采.%The problems such as difficult to determine the mining method,high loss rate and dilution rate,narrow working space are existed during the mining process of steeply inclined and extremely thin ore vein. In order to study the suitable min-ing method of the steeply inclined and extremely thin vein in Mazichong Manganese Mine,among the ore veins,floor and roof, the stability characteristics of veins is best,while the one of roof is worst. Based on the actual engineering geological condition, the waste-lifting filling mining method is proposed. And the rock waste-lifting thickness, stope structure parameters, mining technique are studied,in view of the poor stability of roof,the mining process that the mining process is conducted after rock waste-lifting is proposed,therefore,the mining safety is improved. The experimental mining results show that,the main technical and economic mining index are analyzed,the results show that the ore loss rate is 8. 37%,the ore dilution rate is 6. 45%. The above study results in this paper show that the waste-lifting filling mining method proposed in this paper can provide is suitable for the mining of steeply inclined and extremely thin ore vein,especially for the ore veins of Mazichong Maanganese Mine.
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