山东科学 ›› 2017, Vol. 30 ›› Issue (2): 126-132.doi: 10.3976/j.issn.1002-4026.2017.02.019

• 其他研究论文 • 上一篇    下一篇

岩石内含物对激光破岩的影响

牟海维1,2,辛朋辉1, 罗伟1,2   

  1. 1.东北石油大学电子科学学院,黑龙江 大庆 163318;2. 黑龙江省高校校企共建测试计量技术及仪器仪表工程研发中心,黑龙江 大庆 163318
  • 收稿日期:2016-08-12
  • 基金资助:

    高等学校教学研究项目(DWJZW201405db);黑龙江省高等教育教学改革项目(JG2014010639);黑龙江省留学归国人员科学基金 (LC2013C02);黑龙江省教育厅海外学人科研项目(1253HQ014)

Effect of impurities in rocks on the mechanism of laser rock breaking

MU Hai-wei1,2, XIN Peng-hui1, LUO Wei1,2   

  1. 1.College of Electronic Science of Northeast Petroleum University, Daqing 163318, China;2. Research and Development Center of Measurement Technology and Instrument of University and College in Heilongjiang Province, Daqing 163318, China
  • Received:2016-08-12

摘要:

根据非定常传热原理分析了高斯激光光束作用到岩石表面时岩石内部的温度场分布情况,应用温度场分布结合热应力方程的方法分别模拟了岩石内部有无内含物时的热应力分布情况。数值模拟结果表明,同一激光光束作用相同时间,有内含物的岩石在内含物边缘附近产生的热应力比无内含物的大,即相同的激光功率和照射时间分别作用到有无内含物的岩石时,有内含物的岩石碎裂的可能性更大。在自然界中大多是含有杂质的岩石,该研究为含有内含物情况下的激光破岩提供了理论依据。

关键词: 激光, 破岩, 热应力, 温度场

Abstract:

Based on the principle of unsteady heat transfer, the distribution of temperature field in the rock under the action of Gauss laser beam to the rock surface was analyzed, using the temperature field distribution combined with the method of thermal stress equation to simulate thermal stress distribution of both the rock and the rock with spherical materials. The numerical simulation results show that, if treated with the same laser beam for the same time, the value of thermal stress near the edge of the inclusions caused by the rock with inclusions is bigger than that without inclusions, that is, when the same laser power and irradiation time act on the rocks with or without in them, the rocks having inclusions are more likely to break. In nature, most of the rocks contain impurities, and this work provides the theoretical basis for the laser rock breaking under conditions of rocks containing impurities.

Key words: thermal stress, rock breaking, laser, temperature field

中图分类号: 

  • TN 249

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