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克里沃罗格矿区凿岩爆破技术的发展史,也就是该矿区的地下开采史。在1915年以前,用手工钻凿的炮眼深度1～2米、直径30～40毫米。到1932年,风动凿岩完全代替了手工凿岩。十九世纪末,开始采用火药进行爆破;二十世纪初采用狄那米特;从1929年起,开始采用较安全的粉状硝铵炸药。到三十年代中期,采用浅眼崩矿。1933年出现接杆钎杆,使炮孔深度增加到8米,回采分段高度达10～11米;采用分段崩落法和分段空场法代替矿房-堑沟留矿法、阶段
The history of the rock-blasting technology in the Krieivoog mining area, that is, the underground mining history of the mine. Prior to 1915, the hole was manually drilled 1 to 2 meters deep, 30 to 40 mm in diameter. By 1932, pneumatic drilling completely replaced manual drilling. At the end of the nineteenth century, blasting was started with gunpowder; in the early twentieth century, the use of denimmitate; and from 1929 onwards safer powdered ammonium nitrate explosives were started. By the mid-1930s, shallow-mine collapses. Appeared in 1933 rod drill rod, the hole depth increased to 8 meters, the recovery section height of 10 to 11 meters; the use of sub-caving method and the sub-field method instead of ore-cut trench retention method, the stage