两步骤分段空场嗣后充填法在落凼矿应用研究

落凼矿原使用的留设矿柱的分段空场嗣后充填采矿法存在损失率偏大的问题。针对该问题，提出采用两步骤分段空场嗣后充填连续采矿法进行开采，以降低落凼矿的采矿损失率，并根据矿体的倾角不同提出两种不同的底部结构布置方式，以降低采场的贫损指标和采切工程量。试验结果表明:与原有采矿方法相比，该采矿方法经济技术指标占优，安全可靠，大大降低了采矿损失率，提高了回采率，大大提高了落凼矿的经济效益，可在落凼矿推广使用。

Application of two-step sublevel open stoping and subsequent filling method in Luodang mine

The sublevel open stoping and subsequent filling mining method with reserved pillars used in Luodang mine has the problem of high loss rate. In view of this problem, a two-step sublevel open stope followed by filling continuous mining method is proposed to reduce the mining loss rate of Luodang mine, and two different bottom structure layout modes are proposed according to the different dip angles of the ore body to reduce the lean loss index and mining quantities of the stope. The test results show that compared with the original mining method, the economic and technical indexes of the mining method are superior, and the mining method is safe and reliable, greatly reduces the mining loss rate, improves the recovery rate, and greatly improves the economic benefits. It can be popularized in Luodang mine.