【摘要】 针对歪头山铁矿开采后期炸药单耗升高的问题，开展爆破技术综合改进。构建三维立体爆破调控技术体系，在垂直维度采用顶部空气间隔装药结构，水平维度实施正三角形孔网参数优化，纵深维度开展动态超深设计调整。同时，优选多孔粒铵油炸药，并建立施工质量闭环管控机制，形成“地质适配-参数优化-过程控制”协同调控模式。现场应用结果表明：技术改进后炸药单耗降至3 297.2 kg/万t，较优化前降低4.12%，年创直接经济效益194.4万元；爆破效果显著提升，综合成本有效降低。该协同调控模式为深凹露天矿开采后期爆破参数优化提供了系统性方案，具备良好的推广价值。更多还原

【Abstract】 In view of the problem that the unit consumption of explosives increased in the later stage of mining in Waitoushan Iron Mine,the comprehensive improvement of blasting technology is carried out.The three-dimensional blasting control technology system is constructed. The top air interval charge structure is adopted in the vertical dimension,the parameters of the equilateral triangle hole network are optimized in the horizontal dimension,and the dynamic ultra-deep design adjustment is carried out in the depth dimension. At the same time,the porous ammonium oil explosive is optimized,and the closed-loop control mechanism of construction quality is established to form a collaborative control mode of “geological adaptation-parameter optimization-process control”. The field application results show that the unit consumption of explosives after technical improvement is reduced to 3 297.2 kg/10 000 t,which is 4.12% lower than that before optimization,and the direct economic benefit is 1.944 million yuan per year. The blasting effect is significantly improved and the comprehensive cost is effectively reduced. The coordinated control mode provides a systematic scheme for the optimization of blasting parameters in the later stage of deep open-pit mining,and has good promotion value.更多还原