The reasonable hole pattern of deephole blasting was utilized to make fully use of the explosive energy to improve the crushed ratio to lower the boulder yield and to obtain better dam rocks.
深孔爆破采用合理的布孔方式，使炸药爆炸能量得以充分发挥，破碎率提高，大块度降低，从而获得较理想的堆石坝石料。
Improve stemming quality. By stemming the shot holes with machine-processed stem-soil, the explosive energy utilization ratio rises and 10% explosive are saved.
改善堵塞质量，通过采用机械加工的炮泥堵塞孔口，使爆炸能量利用率提高，节省了10 %的炸药消耗。
Improve stemming quality. By stemming the shot holes with machine-processed stem-soil, the explosive energy utilization ratio rises and 10% explosive are saved.
改善堵塞质量，通过采用机械加工的炮泥堵塞孔口，使爆炸能量利用率提高，节省了10 %的炸药消耗。
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