Simulation on effect of stemming length to deep hole bench blasting;
大块率是评价露天矿台阶深孔爆破质量的重要指标之一。
Three dimensional finite element computing model is established and the effect of stemming length to deep hole bench blasting is studied by three dimensional finite element method.
采用三维有限元数值分析法，通过建立三维有限元计算模型，分析堵塞长度对堵塞区有效应力场的影响。
The results indicate that there is no relationship between the explosion crater and the length of the charge under a certain stemming condition.
数值模拟结果表明，在堵塞条件一定时，单自由面垂直炮孔爆破漏斗与装药长度无关。
In addition, the covering was strengthened by use of such materials as fine earth and straw bag, and the length and quality of stemming were guaranteed, controlling the flying rocks effectively.
此外，采用细土、草袋等材料加强覆盖，保证堵塞长度和堵塞质量，有效地控制了飞石。
In addition, the covering was strengthened by use of such materials as fine earth and straw bag, and the length and quality of stemming were guaranteed, controlling the flying rocks effectively.
此外，采用细土、草袋等材料加强覆盖，保证堵塞长度和堵塞质量，有效地控制了飞石。
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