现场混装乳化炸药在巷道掘进爆破中的试验研究

Experimental Study on On-site Mixed Emulsion Explosive in Underground Roadways Excavation Blasting

为了解决巷道掘进爆破采用包装炸药作业时的人工装药强度大、作业效率低、安全性差等问题,开发了模块化现场混装乳化炸药装药器,设计了末端敏化装置,开展了不同时间下的敏化技术研究,探究了采用现场混装乳化炸药实现光面爆破的方式。研究表明:模块化装药器的装药精度误差控制在±1.5%以内,很好地适应了单孔药量低的特点;采用末端敏化技术,结合不同浓度的敏化剂,实现了炸药密度稳定可控;将模块化装药器集成在工程车底盘,通过无线终端控制系统,装药效率提升了2.4倍,爆破效果良好,同时现场混装炸药光面爆破技术性能初步得以验证,整套技术可以有效代替传统包装炸药爆破作业方式。

In order to solve the problems of high manual charging intensity,low operation efficiency and poor safety when using packaged explosives in underground roadways excavation blasting,a modular on-site mixed emulsion explosive charging device is developed,the end sensitization device is designed,the sensitization technology research at different times is carried out,and the way of using on-site mixed emulsion explosives to realize smooth blasting is explored.The results show that the charging accuracy of modular charging device is controlled within±1.5%,which is well adapted to the characteristics of low single hole charge.Using the end sensitization technology and different concentrations of sensitizers,the explosive density is stable and controllable.The modular charging device is integrated into the chassis of the engineering vehicle,the charging efficiency is increased by 2.4 times through the wireless terminal control system,and the blasting effect is good.At the same time,the performance of the smooth blasting technology of on-site mixed charging explosives has been preliminarily verified,and the whole set of technology can well replace the traditional blasting operation mode of packaged explosives.