Novel approach for the destress blasting in hard rock underground copper mines

IF 0.7 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Journal of Sustainable Mining Pub Date : 2022-08-09 DOI:10.46873/2300-3960.1352
P. Mertuszka, Marcin Szumny, Krzysztof Fuławka, Piotr Kondoł
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Abstract

The present study investigates the possibility of developing a novel method for reducing seismicity and rockbursts in deep underground mines based on modifying drilling and blasting patterns. The main goal was to develop and implement firing patterns for multi-face production blasting, which allow increasing the capability of inducing stress relief in the rock mass, manifested in the seismic event. This method may improve stability control in underground workings, and mitigate risks associated with the dynamic effects of rock mass pressure compared with currently used methods. Thus, the seismic energy may be released immediately after blasting in a controlled way. For this purpose, underground tests using modified blasting patterns and precise electronic detonators were carried out. Vibration data recorded from the multi-face blasting in the considered trial panels were assessed in the scope of amplitude distribution. Results of trials have proven that the method is promising and should be further developed to improve the effectiveness of rockburst prevention in deep hard rock mines.
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地下硬岩铜矿应力爆破新方法
本研究探讨了在改变钻孔和爆破方式的基础上开发一种减少深部地下矿山地震活动性和岩爆的新方法的可能性。主要目标是开发和实施多面生产爆破的射击模式,从而提高在地震事件中诱发岩体应力释放的能力。与现有方法相比,该方法可以提高地下工程的稳定性控制,降低岩体压力动态效应带来的风险。因此,地震能量可以在爆破后以可控的方式立即释放。为此,采用改进的爆破方式和精密电子雷管进行了地下试验。在考虑的试验面板中记录的多面爆破振动数据在振幅分布范围内进行了评估。试验结果表明,该方法具有良好的应用前景,应进一步发展,以提高深部硬岩矿山防治岩爆的有效性。
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来源期刊
Journal of Sustainable Mining
Journal of Sustainable Mining Earth and Planetary Sciences-Geology
CiteScore
1.50
自引率
10.00%
发文量
20
审稿时长
16 weeks
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