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我队为了結合本区岩石情况,进一步寻求合理使用炸藥和降低生产成本的方法,进行了空隙爆破的試驗。总計作了廿五排炮的試驗标定工作,但其中能作为試驗资料的仅有十四排炮。根据初步試驗結果,我們認为,使用空隙裝藥將使爆破威力降低,因此空隙爆破不宜在中硬以上的岩石中推行。特别是在炮眼深度不大及眼底負担較重时,使用空隙爆破將会显著地降低掘进效率,增加炸藥消耗。一、試驗目的及方法試驗工作主要是想确定空隙爆破的经济价值、适用条件,并在各类岩石中探求空隙的使用系数与最优裝藥長度,从而达到合理使用炸藥的目的。試驗的岩石性質为青色灰岩,节理发达,中等风化,岩石硬度按統一分类法确定为九級。爆炸藥包的間隙物为空
In order to further explore the reasonable use of explosives and reduce the production cost, our team carried out the test of void blasting in order to combine the rock conditions in this area. A total of twenty-five cannon test calibration work, but which can be used as test data only 14 cannon. According to preliminary test results, we believe that the use of void charge will reduce the blasting power, so void blasting should not be carried out in medium hard rock. Especially when the blasthole depth is low and the fundus burden is heavy, the use of void blasting will significantly reduce the tunneling efficiency and increase the explosive consumption. First, the purpose and method of test The main task of the experiment is to determine the economic value of void blasting, the applicable conditions, and in various types of rock to explore the use of space factor and the optimal charge length, so as to achieve the purpose of the proper use of explosives. The rocks tested are cyan limestone with well-developed joints and moderate weathering. Rock hardness is determined to be nine levels according to the uniform classification. Explosives kits space is empty