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白银有色金属公司所属小铁山矿,平均含硫量高于15%,属于含硫较高的矿山,使用无底柱分段崩落法,中深孔崩矿,孔深5～12米,孔径60毫米,用装药器装粉状硝铵炸药。为了给小铁山矿采矿爆破作业正常进行提供可靠的技术依据,文章对该矿矿石理化性质及其与炸药接触的试验和自爆危险性做了评价,并提出预防自爆的技术措施,以保证安全生产顺利进行。
The small iron ore company owned by Baiyin Nonferrous Metals Company, with an average sulfur content higher than 15%, belongs to a mine with high sulfur content. It uses subsidence-free subsidence method, medium- and deep-hole collapse, with hole depth of 5 to 12 meters and pore size 60 mm, loaded with powdered ammonium nitrate explosive charge. In order to provide a reliable technical basis for the normal operation of mining and blasting operations in Xiaotieshan Mine, this paper evaluates the physical and chemical properties of the ore and the risks of tests and explosives in contact with explosives, and puts forward technical measures to prevent self-blast in order to ensure safety Production goes smoothly.