| 管棚超前支护隧道掘进周边控制爆破方法 |
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| 引用本文： | 戴俊. 管棚超前支护隧道掘进周边控制爆破方法[J]. 辽宁工程技术大学学报(自然科学版), 2011, 30(2): 225-228 |
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| 作者姓名： | 戴俊 |
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| 作者单位： | 西安科技大学,建筑与土木工程学院,陕西,西安,710054;麦吉尔大学,采矿金属与材料工程系,加拿大,蒙特利尔,H3A2A7 |
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| 基金项目： | 中国博士后科学基金资助项目(2005037221) |
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| 摘 要： | 为了改善松软岩隧道,采用管棚超前支护条件下的周边爆破效果,分析了隧道开挖周边爆破效果差的原因,以及改善周边控制爆破效果的方法。研究表明:周边眼及二圈眼应以较大角度向外倾斜钻进,通过按光面爆破要求进行二圈眼爆破参数设计,实行间隔炮眼不等装药,间隔分段起爆等,可为周边眼爆破创造良好条件;进一步得到了相应的二圈眼和周边眼爆破参数确定方法,有助于达到充分利用炸药能量,降低周边控制爆破对隧道围岩的损伤,实现良好的周边控制爆破效果;算例表明:二圈眼间距和最小抵抗线均小于周边眼的相应值,计算结果与工程实践相符。对提高松软岩石的爆破施工效率有参考价值。
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| 关 键 词： | 隧道掘进 前支护 边爆破 制爆破 松软岩石 |
Controlled perimeter blasting method for tunnel driving with advance canopy support |
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| DAI Jun. Controlled perimeter blasting method for tunnel driving with advance canopy support[J]. Journal of Liaoning Technical University (Natural Science Edition), 2011, 30(2): 225-228 |
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| Authors: | DAI Jun |
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| Affiliation: | DAI Jun(College of Architectural and Civil Engineering,Xi'an University of Science and Technology,Xi'an 710054,China,Department of Mining,Metals and Materials Engineering,McGill University,Montreal H3A 2A7,Canada) |
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| Abstract: | In order to produce the better result of contour blasting for driving tunnel through soft rocks with advance canopy support,this paper investigates the reasons causing bad result on contour blasting and the method for a better contour blasting.The analysis shows that the blast holes on and next to the perimeter should be drilled outwards with a larger angle,and the blasting parameters for the perimeter holes and the holes next to the perimeter should be designed according to the requirements for smooth blas... |
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| Keywords: | tunnel driving advance support contour blasting controlled blasting soft rock |
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