基于硬岩快掘技术的切缝药包聚能爆破试验研究

CUMULATIVE BLASTING EXPERIMENT STUDY OF SLOTTED CARTRIDGE BASED ON HARD-ROCK RAPID DRIVING TECHNOLOGY

为了检验切缝药包在岩巷快掘中的适应性及控制爆破参数,首先优化爆破参数的设计,使得炮眼利用率达到90%以上,达到快速掘进和光面爆破的要求,在爆破方案取得成功后进行全断面两边周边眼对比试验和全断面控制爆破对比试验,通过对比,全断面周边眼进行控制爆破眼痕率可以达到90%,同眼距情况下,0.5 kg为最优,装药量比光爆和原方案分别减少16.7%和37.5%;同药量情况下,眼距由原来的450 mm可以扩大到550 mm,提高22%以上。试验结果表明,简易切缝药包不仅成型好而且为企业创造较高的经济效益,适合在岩巷快掘施工中推广。

In order to test adaptability and directed blasting parameters of slotted cartridge in rock driving, firstly, design of blasting parameters is optimized, and making the hole utilization rate reach more than 90%, the requirements of rapid driving and smooth blasting are reached. Secondly, after the success of blasting program, the both-sides comparison experiment of the surrounding holes and all surrounding holes comparison experiment are made, hole mark rate can reach 90%. At the same space, the best charge is 0.5 kg, and it can be less 16.7% and 37.5% than smooth blasting and ordinary blasting. At the same charge, blast-hole space can be extended from 450 mm to 550 mm, improvement rate is more than 22%. The experiment results show that control blasting using the simple slotted cartridge can be better for forming and taking more benefits for enterprise; it is suitable for spread in rock rapid driving.