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为了在生产中有效可靠地进行中深孔落矿,并降低爆破大块率和粉矿量,三鑫公司和长沙矿山研究院开展了中深孔凿岩爆破参数试验研究。根据三鑫公司的矿岩条件,通过爆破漏斗试验、宽孔距同段爆破漏斗试验和斜面台阶爆破试验与理论研究,初步确定中深孔凿岩爆破参数,并通过正交爆破试验进行优化,取得了适合三鑫公司的中深孔凿岩爆破参数,推荐采用的爆破参数为:孔底距2.3m,最小抵抗线1.3m,孔底安全药包起爆。
In order to effectively and reliably carry out deep-hole delamination in production and reduce the blasting bulk rate and the amount of fines, Sanxin and Changsha Institute of Mining conducted a pilot study on the drilling parameters of medium-deep hole drilling. According to the mine rock conditions of Sanxin Company, the parameters of blasting in medium and deep boreholes are preliminarily determined through the blasting funnel test, the blasting funnel test with the same pitch and the bench slope blasting theory and the theoretical research. The parameters of the blasting in medium- Deep hole drilling and blasting parameters suitable for Sanxin Company have been obtained. The recommended blasting parameters are: pit bottom distance 2.3m, minimum resistance line 1.3m, hole bottom safety kits detonated.