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湖南湘西金矿是我国重点黄金矿山,资源丰富,矿石经济价值高.过去,由于在开采1.5～3.5米厚的缓倾斜富矿体中的护顶技术尚未过关,顶板冒落严重,安全作业条件差,影响地下资源的回收.因此,决定对这类矿体采用长锚索预控顶连续分条尾砂充填采矿方法.此法的特点是沿走向将矿块划分若干矿房,矿房分条连续回采,回采时用长锚索预控顶和短锚杆联合护顶来控制地压,采后用尾砂充填.矿块在回采过程中只暴露一个回采矿房的顶板,作业安全可靠;矿块不留房间矿柱和顶柱,底柱山下中段回收,矿石回采率较高.通过近三年来的现场试验研究,已取得了良好的效果.试验采场的综合技术经济指标及效益为:
Hunan Xiangxi Gold Mine is a key gold mine in China with abundant resources and high ore economic value.In the past, due to the lack of protection of the roof technology in the gently inclined bauxite mining of 1.5-3.5 meters thick, the roof caving was serious and the safe working conditions Poor, affecting the recovery of underground resources.Therefore, we decided to use this type of ore body long precast roof top continuous tailings filling method.This method is characterized by the direction of the ore block is divided into a number of mining houses, mining points Continuous mining, mining with long cable pre-control roof and short anchor joint roof to control the ground pressure, after the mining with tailings filling.Nuclear block in the mining process exposed only to the roof of a mining house, safe and reliable operation ; The ore block does not leave the room pillar and the top pillar, the bottom pillar is recovered in the middle of the mountain, the recovery rate of the ore is high .Through the field test and research in the past three years, good results have been obtained.Technology and economy index and benefit of the test stope for: