由于各种矿山地质条件和采矿技术因素对列宁诺戈尔斯克公司各矿床开采的影响,决定要用直径65～155毫米的深孔进行崩矿:直径105和125毫米深孔崩矿量占80;65～70毫米深孔的崩矿量占20%。采用扇形布孔方式可减少钻机移动次数和采准切割工程量,从而可提高总凿岩效率,故决定以这种布孔方式作为基本方式。 Due to various mine geological conditions and mining technical factors affecting the mining of Leninogorsk’s mines, it was decided to use deep holes of 65-155 mm in diameter for the collapse: 80 and 125 mm deep-hole collapses accounted for 80% ; 65 ~ 70 mm deep hole ore collapse accounted for 20%. The use of fan-shaped hole drilling method to reduce the number of moving and cutting the amount of approval of the project, which can increase the total drilling efficiency, it is decided to use this method as the basic way of cloth.