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以千家坪钒矿水平扇形深孔阶段矿房法回采中深孔爆破为研究对象,针对该矿岩呈薄层状结构、节理裂隙发育的特点,在爆破漏斗试验的基础上,进行中深孔爆破参数的优化研究,获取最适合该矿岩特性的爆破参数,孔排距3.0m,孔底距约3.6m,炮孔临近系数为1.2左右,孔间延时50ms孔底起爆,取得细粒级碎块提高6.8个百分点,大块率降低5.4个百分点的良好效果。
Taking the deep-hole blasting of the mining method in fan-shaped deep-hole stage of Qianjiaping vanadium mine as the research object, according to the characteristics of the ore-rock being thin-layer structure and the development of joint and fissure, based on the blasting funnel test, Blasting parameters to obtain the most suitable blasting parameters of the rock properties, hole row spacing of 3.0m, hole bottom distance of about 3.6m, the hole near coefficient of about 1.2, between the hole delay 50ms hole initiation, to obtain fine 6.8 percentage points increase the level of fragments, the bulk rate of 5.4 percentage points to reduce the good results.