摘要
针对露天矿爆破开采时出现矿岩大块率高的问题,尝试利用声波检测技术探究岩性及岩体内部损伤程度,结合Micro Trap爆速测速仪分析炸药、岩石波阻抗匹配关系。以德兴铜矿为例,通过声波测试技术对该矿某大块率较高地段进行研究,分析出该地段岩体结构完整性差,裂隙发育程度高,导致爆破时炸药能量传递不均。提出减小孔网参数,采取逐孔微差起爆的方式能有效降低大块率,提高炸药能量利用率。
For solving the problem of high rate of agglomcrate is arised by blasting during the period of mining in open-pit mine, the acoustic wave testing techniques was used to study on lithology and internal damage of rock mass, analysing the matching relationship between rock wave impedance and explosives by MicroTrap exploding rate instrument. A case study of Dexing copper mine, by studying the area with a high rate of agglomcrate, the results show that the rock mass structural is poor and fracture-development degree is high, it leads to uneven transfer of explosive energy. Decreasing blasting-holes net parameters, and hole-by-hole micro-delay initiation technique can reduce the rate of agglomcrate effectively and improve the utilization ratio of explosive energy.
出处
《煤炭技术》
CAS
北大核心
2017年第3期195-197,共3页
Coal Technology
基金
国家自然科学基金重点资助项目(50764001)
关键词
波阻抗
裂隙发育
能量利用率
wave impedance
crevasse growth
utilization ratio of energy
