安家岭露天矿台阶爆破质量优化研究

为了提高安家岭露天矿煤岩台阶的破碎效果，降低爆破成本，比较深入地分析和研究了岩体的节理裂隙、孔网参数的布置、起爆方式以及台阶深孔爆破装药技术等几种因素对台阶爆破效果的影响。针对该矿在爆破生产过程中遇到的拉底和大块问题，通过改变和调整孔网参数、装药结构、炸药单耗、起爆药包位置及微差间隔等技术措施，改善了煤岩台阶的破碎效果。实践表明，这些爆破技术的优化提高了该矿的综合生产效率，也使开采成本得到了一定的控制。

Study on Quality Optimization of Bench Blasting in Anjialing Open-Pit Mine

To improve the blasting effect and reduce the cost of coal-rock bench blasting in Anjialing Open-Pit Coal Mine, the effect of several factors on the bench blasting results are studied in depth, including the rockmass joint and fissure, hole-spacing parameters, detonation mode and long-hole explosive charging technique. In view of the problems of tight bottom and large fragmentation encountered in the blasting process, technical measures such as changing and regulating the hole-spacing pattern parameters, charging structure, unit consumption of explosive, position of detonation cartridge and millisecond interval are taken to improve the blasting effect of coal-rock bench. The practice shows that these optimized blasting techniques can improve the overall production efficiency of this mine and meanwhile, control in certain degree the mining cost.