大直径束状深孔爆破技术在缓倾斜中厚矿体开采中的应用

Application of Large-Diameter Long Bunch Hole Blasting Technology in Mining of Gently Inclined Medium Thick Orebody

缓倾斜中厚矿体因其特殊的矿体产状,矿石难以借用自重运搬,多采用电耙出矿,气腿凿岩,机械化程度低,作业效率低,采切比大,工作环境及作业安全性差。这些问题一直制约着缓倾斜中厚矿体的安全高效开采,并使缓倾斜中厚矿体成为世界公认的难采矿体。大姚铜矿深部缓倾斜中厚矿体采用束状孔爆破,成功实现高效安全开采。

Due to the special modes of occurrence of gently inclined medium thick orebody, the ore cannot be hauled by gravity. The methods of scraper ore removal and air leg drilling are commonly used, which indicates the low mechanization degree, low operation efficiency, large cutting ratio, poor working environment and operation security. These problems have been restricting the safe and efficient mining of the gently inclined medium thick orebody; thus such type of orebody has become the world recognized orebody being difficult for mining. Bunch hole mining technology is used for mining the gently inclined medium thick orebody deep in Dayao Copper Mine, and the efficient and safe mining has been successfully achieved.