平面药包的最佳间距

在矿山剥离、场地平整以及建(构)筑物基坑开挖等露天爆破中,为了充分利用炸药能量将岩石松动或抛掷到一定区域,并确保底板满足一定平整度要求,按照爆破技术设计和工程质量要求,需要设计平面布药结构.本文通过在施工现场进行的大量小型模拟实验,对平面药包间、排距与爆破漏斗的开口面积、可见深度、爆岩的抛掷距离和堆积形态等关系进行了系统分析与研究.实验结果表明,当平面药包间、排距满足一定范围时,爆破漏斗的可见深度较小,而开口面积和抛掷距离最大,爆堆形态较好.平面布药结构存在一个有利于抛掷堆积的最佳间、排距.

Research on optimal spacing of plane charge

In order to make the best use of explosive energy in loosing soil or throwing it onto some area and ensuring the bottom meet some leveling requirements after blasting, a plane charge layout is often adopted according to blasting design and engineering quality requirements in open chamber blasting such as mine exploitation, field leveling and foundation pit excavation of construction. Through a lot of small scale simulated tests in construction field, this paper systemically analyzed the dependence of the open area and visible depth of blasting craters, the thrown distance and the accumulation state of rock on the row spacing and the column spacing of plane charge. The experimental result indicated that when the spacings meet some area, the blasting can gain the least visible depth, the biggest open area of blasting craters, the biggest thrown distance and a better accumulation state. It is believed that there is an optimal row spacing and column spacing in the plane charge layout which is beneficial to thrown pilling.