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| | This treatise is mainly based on the reseach for improving the effect of bench bla-sting at Dexing Copper Mine.The test work was carried out in 1980~1982 in cooper-ation with Changsha Research Institute of Mining,Dexing Copper Mine and Nan-chang Nonferrous Metallurgical Designing-Research Institute.This paper discusses theeffects of parameters on rock blasting,such as the drilling patterns,short delay interval,specific charge,charged construction,ratio of length of charge to length of stemming,ignition patt... | | 本文主要依据长沙矿山研究院、德兴铜矿和南昌有色冶金设计研究院等三单位于1980~1982年在德兴铜矿为提高露天矿梯段爆破质置所作的研究工作,它论述了爆破参数,如孔网参数、微差间隔时间、单位炸药消耗量,装药结构、装填比例、起爆方式等对矿岩爆破的影响;探讨了由现场半工业试验转为工业生产试验的方法;提出了合理爆破参数的确定原则及其计算公式;针对德兴铜矿矿岩特性,采用综合技术措施,改善难爆矿岩的破碎质量。在试验研究过程中,把用高速摄影、地震测量和声学检测等现代观测手段所获得的数据,作为确定爆破参数的科学基础之一。整个试验研究工作取得了较好的技术经济效果。与开展试验前同类型的生产爆破相比,试验炮在单位炸药消耗量减少23.64~32.73%情况下,矿岩爆破平均大块率降低51.85~85.21%,平均延米炮孔爆破量提高13.14~17.60%,平均电铲作业效率提高14.52%。最后,作者根据德兴铜矿目前的具体情况,就进一步提高梯段爆破质量,提出了若干建议。 | | 文摘来源 | | This paper analyses the possible causes of high boulders frequencies during the blasting of the massive rock with a complex structure at Yi Chun Mine, and describes the main engineering measures for reducing the boulder frequency. The results of tests show that the boulder frequency has been decreased from 30% to<10% by means of small burden, low stemming, high specific charge, interrupted coupling charge and shorter delay splitting blasting. | | 本文分析了在宜春矿结构复杂的块体状矿体中爆破大块率高的原因以及论述了降低大块率的主要技术途径,工业试验结果表明,应用小抵抗线、低填塞、高单耗、分段偶合装药、短微差和预裂爆破等综合技术措施,能取得大块率从30%降低到10%以下的效果。 | | 文摘来源 | | On the basis of both simulation test in the laboratory and industrial test in situs, this paper discusses how to determine reasonable blasting pattern parameters, verify adaptability of the existing equipment and take comprehensive technical measures for reducing muck height, etc., for increasing bench height from 12m to 15m in Qidashan iron mine. | | 本文通过实验室模拟实验和现场工业实验论述了齐大山铁矿开采台阶从12m提高到15m,是如何确定合理的穿爆孔网参数、验证现有装备的适应性以及降低爆堆高度的综合技术措施等。 | | 文摘来源 | |   | | << 更多相关文摘 |
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