宽孔距爆破技术研究应用现状

STUDY ON THE LARGE SPACING BLASTING TECHNOLOGY ANDITS APPLICATION STATUS

从宽孔距爆破技术的模型试验及应用现状的分析，认为难爆多裂隙矿岩的裂隙性质大大影响了宽孔距爆破密集系数的大小，其裂隙的增大使得密集系数减小。因此宽孔距爆破试验模型材料的选择，要考虑节理及裂隙等因素，以便从试验中得出节理、裂隙对宽孔距爆破参数的影响。实际上，宽孔距爆破技术通过炮孔的起爆方式体现在炮孔的动临近系数上，已在各矿山、采石场等地得到广泛的应用。

Based on the analysis of the experiments of model and the situations of application in the large spacing blasting technology,that the ratio of spacing to burden in the blasting of large spacing is affected greatly by the characteristic of the fractures in the multifracture rockmass and the size of fracture increases with the ratio of spacing to burden decreasing was put forward.Thus to the choice of material in the blasting mould experiment,the factors of joints and fractures should be considered,because the parameters of the large spacing blasting are affected by joints and fractures.In the open pit mine,the large spacing blasting technology, which was widely applied in the pit mine and quarry,has already embodied in the ratio of spacing to burden in dynamic blasting state through the detonation manner of hole.