新型大孔径静态破碎技术的试验研究

Experimental Study on a New Technology of Static Blasting in Large Diameter Borehole

在传统静态爆破的基础上,提出了一种新型大孔径静态爆破技术,使用新型扩孔钻头结合机械堵孔器解决了大孔径静态爆破的冲孔问题。由于孔径的增大,使得破碎剂膨胀压力增大,膨胀剂反应速度加快,加大了堵孔难度。设计的新型扩孔钻头和新型堵孔器进行了孤岩块的大孔径静态爆破试验,试验结果证实了该新型大孔径静态爆破技术的可行性,达到了提高爆破能力和缩短破坏时间的预期目的。为今后的敏感地区岩石爆破工程开挖提供了新途径。

Bases on the traditional static blasting, a new technology of static blasting in large diameter borehole is presen- ted ; with a new reaming bit and mechanical hole plugging device, hole gushing of static blasting in large diameter borehole was solved. As the hole becoming larger, the expansion pressure increases and the reaction of cracking agent speeds up, these make plugging more difficult. Test of static blasting in large diameter borehole for block rock was made by newly de- signed reaming bit and hole plugging device, which proves the feasibility of this new technology with expected effects of im- proving the cracking ability and reducing the cracking time. It is a new way for rock blasting construction in sensitive areas.