Study on the Correlation Between Cutting Ability of Abrasive Water Jet and Rock Mechanics Parameters
The common rock within 30 m above the coal seam of Shanxi group Ⅱ 1 was selected as the target,and the abrasive water jet cutting test was carried out.The correlation between rock mechanical parameters and kerf depth was analyzed,and the micro-morphology of the inner wall of the cutting seam was observed by means of VHX-2000 digital microscope.The results show that the rocks above the coal seam in the study area are mainly siltstone,medium sandstone,mudstone,sandy mudstone,followed by limestone and coarse sandstone.The correlation between kerf depth and elastic modulus of rock is the strongest,but there is also an abnormal relationship between kerf depth and elastic modulus of rock.The correlation between kerf depth and compressive strength of rock is the second,and the correlation between kerf depth and tensile strength is the weakest.Rock lithology has no effect on the cutting mechanism of abrasive water jet.Rock crystals mainly undergo transgranular fracture and intergranular fracture.The change of kerf depth is mainly affected by factors such as rock crystal strength,crystal cementation and crystal diameter.
Abrasive water jetRock mechanics parametersKerfCutting excitationCorrelation analysis
万方数据
维普
