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首页> 外文会议>International conference on electric technology and civil engineering >Research on the Role of Control Hole in Deep-hole Pre-splitting Blasting in Outburst Coal Seams
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Research on the Role of Control Hole in Deep-hole Pre-splitting Blasting in Outburst Coal Seams

机译：控制孔在突出煤层深孔预裂爆破中的作用研究

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Mechanical analysis model of blasting and controlling holes was set up combined with a gas outburst mine deep hole presplit blasting test, and the necessity of setting control hole in deep hole pre splitting blasting was analyzed. The theoretical calculation formula of hole spacing between the blasting and control hole was deducted based on explosion mechanics and elastic mechanics theory. The formula was applied in mine deep hole pre-splitting blasting parameters calculation, and can get the conclusion that hole spacing between the blasting and control hole can be increased to 6m. After the test found that the blasting holes gas drainage of average flow rate increased by 60 ~ 103%, and the average flow rate of the control holes gas drainage increased by 24 ~ 30%. The time of gas drainage was shortened and it can meet the need of mine production. It is indicated that the hole spacing between control hole and blasting hole up to 6m is appropriate.
机译：结合瓦斯突出矿井深孔预裂爆破试验，建立了爆破控制孔的力学分析模型，分析了深孔预裂爆破中设置控制孔的必要性。根据爆炸力学和弹性力学理论推导了爆破孔与控制孔之间的孔间距的理论计算公式。将该公式应用于矿井深孔预裂爆破参数计算中，得出的结论是，爆破孔与控制孔之间的孔距可以增加到6m。经试验发现，喷孔瓦斯抽放量的平均流量增加了60〜103％，而控制孔瓦斯抽出量的平均流量增加了24〜30％。缩短了瓦斯抽放时间，可以满足煤矿生产的需要。结果表明，控制孔与爆破孔之间的孔距不超过6m是合适的。

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