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| Study of erosion and damage characteristics of rock by abrasive water jet using CT |
| TANG Jiren1，2，LU Yiyu1，2，SUN Huijuan3，GE Zhaolong1，2，XIA Binwei1，2，LI Qian1，2 |
| (1. State Key Laboratory of Coal Mine Disaster Dynamics and Control，Chongqing University，Chongqing 400044，China；
2. State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam，Chongqing University，Chongqing 400030，China；3. Mechanical Engineering College，Chongqing Industry Polytechnic College，
Chongqing 401120，China) |
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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.
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2016, Vol. 35 
