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.