钻孔冲击破岩掘进过程的数值模拟与工艺探讨  

Digital Simulation and Technique Discussion for Rock Breaking by Percussive Drilling in Hard Rock Tunneling Process

作　　者：李满红[1] 龙日升[2,3] 孙少妮[4] 

机构地区：[1]长沙矿冶研究院有限责任公司,湖南长沙410012 [2]太原理工大学机械工程学院,山西太原030024 [3]山西省煤矿综采装备重点实验室,山西太原030024 [4]东北大学机械工程与自动化学院,辽宁沈阳110819

出　　处：《矿冶工程》2016年第2期14-18,22,共6页Mining and Metallurgical Engineering

摘　　要：为解决现有硬岩掘进方法进尺效率低的问题,提出了使用液压冲击设备进行超硬全岩巷道快速掘进的新工艺和新方法。通过APDL编程,利用＂生死单元＂对超硬岩体的钻孔冲击破碎过程进行了模拟和分析,并在锦州凌海白台子乡花岗岩采石场进行了现场工艺试验。结果表明,钎杆冲击位置与钻孔的距离应控制在0.15~0.2 m,钻孔半径以0.035 m为宜。钻孔冲击破岩的效率约为无钻孔冲击破岩效率的4倍,钻孔冲击破岩可以实现硬岩掘进,但工艺还有待进一步优化。In order to improve the tunneling efficiency and reduce the cutting volume during hard rock tunneling process,it is suggested that the hydraulic impact drill adopted for the tunnel advancement totally in hard rock. With APDL programming,the hard-rock breakage by percussive drilling was simulated and analyzed with element birth and death technology. Furthermore,an experiment on actual rock breaking by percussive drilling was conducted in a granite stone pit in Baitaizi County of Linghai City in Jinzhou. Results revealed the distance between impact position and drilling hole should be controlled within 0. 15 - 0. 2 m,and the drill hole radius should be preferably around 0. 035 m,which can lead to the rock breaking efficiency as much as 4 times of that percussive rock breaking without drilling hole. It is concluded that such percussive rock drilling can be used for hard rock tunneling,but needs further optimization.

关 键 词：钻孔冲击破岩 硬岩掘进 数值模拟 工艺研究 

分 类 号：TD421[矿业工程—矿山机电]