Anhui Tongling Conch Cement Co. , Ltd.
School of Chemical and Blasting Engineering, Anhui University of Science & Technology

控制骨料矿山石灰石含粉率对矿山高质量发展和经济效益的发挥具有重要意义。以某薄层石灰石矿山为例,在分析影响骨料含粉率高的基础上,通过综合运用工程爆破技术手段并结合现场实际生产,调整炮孔延期时间、炮孔装药结构及爆破孔网参数等,以此设计3种爆破方案展开实验。研究结果表明:将孔间延期时间由17ms减少至9ms,排间整体延期时间由132ms增加至147ms,采取间隔装药,填塞总体长度在7.5m时,爆破效果较好,爆破粉矿率明显降低,大块率明显提升;炮孔孔网面积增加至49.5m2后,不影响岩石爆破效果,有效降低了炸药单耗,节约了生产成本。

Controlling the powder content of limestone in aggregate mines is of great significance to the high-quality development and economic benefits of mines. Taking a thin-layer limestone mine as an example, on the basis of analyzing the impact of high aggregate powder content, through the comprehensive application of engineering blasting technology and combining with the actual production on site, the blast hole delay time, blast hole charging structure and blast hole network are adjusted, so as to design three kinds of blasting schemes to carry out experiments. The test results show that by reducing the delay time between holes from 17 ms to 9 ms, increasing the overall delay time between rows from 132 ms to 147 ms, and adopting interval charging, when the overall stemming length is 7. 5 m, the blasting effect is better, the blasting powder rate is significantly reduced, and the bulk rate is significantly improved. After the area of the blast hole network is increased to 49. 5 m2, the rock blasting effect is not affected. Therefore, the unit consumption of explosives is effectively reduced, and the production cost is saved.

安徽省教育厅高校科学研究项目(13190248)

张杰,雷战,李洪伟,等. 在薄层石灰石矿山降低骨料含粉率的研究[J]. 煤矿爆破,2024,42(1):8-10.

ZHANG Jie,LEI Zhan,LI Hongwei,et al. Research on reducing aggregate powder content in thin-layer limestone mines[J]. Coal Mine Blasting,2024,42(1):8-10.