Experimental results show that the cut blasting effect of bottom charge is better than that of conventional charge.
试验结果表明，底部空气柱装药掏槽爆破效果优于常规装药效果。After using local materials with empty holes, cutting holes and delayed-action detonators, the efficiency of blasting has been improved.
在就地取材等不利条件下，通过布置空心眼、掏槽眼和采用延时雷管，提高了爆破效率。The loosening holes outside the plough cut are also drilled at an angle which improves the breakage possibility.
在楔形掏槽眼外侧的扩槽眼也要有角度以改善爆破效果。The practice has shown that the initiation delay time is an important factor affecting cut blasting effect.
工程实践表明，微差起爆时间是影响掏槽效果的一个重要因素。The cut way and hole parameters affect the drivage efficiency and cost.
掏槽方式及布孔参数影响着掘进效率和成本。The study has provided a ba se for design of blasting parameters of parallel cut.
为含空孔直眼掏槽爆破参数设计提供了依据。Determination of Rational Undermining Form of Gun-drilling Detonation in Hard Tunnel
岩巷中深孔爆破合理掏槽型式的确定Application of the Wedge-Shaped Troughs with a Large Cross Section in Digging Tunnels of the Qinling Road
大断面楔形掏槽在秦岭公路隧道开挖中的应用Optimization of Cutting Holes Layout for the Blasting of Roadway Excavation at a Certain Metal Mine
某金属矿巷道掘进爆破的掏槽孔布孔优化