山东镁矿预防深孔爆破地震效应实践

Practice of Preventing Earthquake Effect of Borehole Blasting

山东镁矿通过控制一段起爆药量、合理选取起爆微差以及采取底部空气柱爆破技术等办法,在距离采场周边民用建筑物较近的情况下,有效地降低了深孔爆破地震效应对民用建筑物的损坏程度。

By controlling quantity of single-stage priming, selecting tiny difference time of detonation reasonably, adopting bottom air pillar blasting technique, etc., the borehole blasting earthquake effect to public building degree is lowered in Shandong Magnesite Mine, under the situation of the distance stope first field is nearer to the public building in perimeter.