某铀矿浅孔爆破落矿质量控制研究

某铀矿采用上向水平分层充填采矿方法开采，采场落矿原先采用推进式下向压采爆破方式，存在爆破落矿大块多、矿堆质量差、工人劳动强度大、采矿效率低、安全性差等问题。通过无轨机械化技术改造后，采用机械化上向水平分层充填采矿工艺，采场落矿采用分层集中钻孔，一次爆破落矿方式。为配合无轨采矿工艺，开展了浅孔爆破落矿质量控制试验研究，得到了合理的爆破炮孔布孔参数、起爆网路连接和爆破落矿工艺。将试验结果应用于工业生产，获得了较好的应用效果，采矿效率大幅提高，降低了大块产率，提高了爆破落矿质量，消除了采场二次爆破，降低了工人劳动强度，提高了本质安全度。

Study on Quality Control of Shallow Hole Blasting in a uranium mine

A uranium mine is mined by the upward horizontal layered filling mining method. The stope drop originally used the push-down downward pressure mining blasting method,which has many large pieces of ore dropped by blasting, poor quality of the ore heap, high labor intensity of workers, low efficiency and poor security. After the trackless mechanization technology transformation, the mechanized upward-to-horizontal layered filling mining process is adopted,and the stope dropping adopts the method of layered and concentrated drilling and one blasting drop. In order to cooperate with the trackless mining process, an experimental study on the quality control of the shallow hole blasting and falling ore was carried out, and the reasonable blasting hole layout parameters, the blasting network connection and the blasting and falling ore technology were obtained. The test results were applied to industrial production, and good application results were obtained. The mining efficiency was greatly improved, the yield of large blocks was reduced, the quality of blasting ore was improved, the secondary blasting of the stope was eliminated, the labor intensity of workers was reduced, and the intrinsic safety.