基于CT方法的磨料射流冲蚀损伤岩石特性研究

doi:10.13722/j.cnki.jrme.2015.0881

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摘要为了深入揭示磨料射流破岩机制，开展磨料射流冲蚀典型脆性岩石(硅质灰岩)实验，同时用CT扫描机对冲蚀后试件进行CT扫描，并利用图像处理技术对获得的CT图像进行二值化处理，直观反映磨料射流作用下岩石的破坏与损伤情况。结果表明：磨料射流破岩过程中除了能冲蚀去除岩石，于岩石内部形成由圆形截面与“V”形垂面构成的倒锥体冲蚀孔洞外，还会在孔壁致生大量小裂缝，对岩石产生一定的损伤作用，于冲蚀孔周边构造出一定范围的损伤区。通过实验测试手段直接验证了磨料射流冲蚀损伤岩石特性的存在，为深入揭示磨料射流破岩机制提供实验基础。

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关键词 ：岩石力学, 磨料射流, 破岩, 损伤, CT扫描, 图像处理

Abstract：In order to reveal the mechanism of rock breaking of abrasive water jet，experiments of abrasive water jet erosion on typical brittle rock(siliceous limestone) were carried out and CT scanner was used. The image processing technique and binarization processing of CT image were used to directly capture the rock fracture and damage under the abrasive water jet. The results showed that in the process of rock erosion，in addition to the rock removal and an erosion hole in the interior of the rock formed by circular cross-sections and “V” shape vertical structure. A large number of small cracks appeared on the hole wall，which damaged rock within a range. The results verified the existence of damage properties under abrasive water jet erosion.

Key words： rock mechanics abrasive water jet rock breaking damage CT scanning image processing

引用本文:

汤积仁1，2，卢义玉1，2，孙惠娟3，葛兆龙1，2，夏彬伟1，2，李倩1，2. 基于CT方法的磨料射流冲蚀损伤岩石特性研究[J]. 岩石力学与工程学报, 2016, 35(2): 297-302.
TANG Jiren1，2，LU Yiyu1，2，SUN Huijuan3，GE Zhaolong1，2，XIA Binwei1，2，LI Qian1，2. Study of erosion and damage characteristics of rock by abrasive water jet using CT. , 2016, 35(2): 297-302.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2015.0881 或 http://www.rockmech.org/CN/Y2016/V35/I2/297

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