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1959年苏联科学院矿业研究所金属矿床地下开采实驗室的研究人員与克里沃洛格矿区的生产工作者合作,提出了应用組合密集炮孔(非常集中的平行或稍微散开的束状深孔(崩矿的新的凿岩爆破工作方法。并于1960～1962年间,进行了实验室試驗和工业試驗。这种方法的实质在于:炮孔在水平面或垂直面上平行于自由面成束状布置,束中炮孔間距等于炮孔直径的3—6倍,并同时起爆。用4—6軸的自动钻机同时钻凿4—6个炮孔,同时因最小低抗綫增大到8—12米
In 1959, researchers from the underground mining laboratory for metal deposits at the Institute of Mining Research, the Soviet Academy of Sciences, in collaboration with producers in the Kliwallog mining area, proposed the use of a combination of dense boreholes (very concentrated parallel or slightly divergent bundled deep holes (New blasting blasting working method for collapses.) Laboratory tests and industrial tests were carried out between 1960 and 1962. The essence of this method is that the blast hole is in a horizontal or vertical plane parallel to the free surface Arrangement, beam beam hole spacing is equal to 3-6 times the diameter of the hole, and at the same time detonated.Use 4-6 axis automatic drilling machine while drilling 4-6 holes, at the same time due to the minimum low-line increased to 8- 12 meters