不同温度条件下花岗岩的点荷载强度特征试验研究

Experimental Study on Point Load Strength Characteristics of Granite under Different Temperature Conditions

对于不同海拔地区矿山工程机械作业优化仿真研究,需要准确确定不同海拔高度处的工程岩石受温度影响的力学参数值。本文以矿山工程常见的花岗岩为研究对象,在广西柳工机械股份有限公司全球研发中心的高低温试验室中开展不同温度下花岗岩的点荷载试验。基于三维扫描设备0.001mm量级精度的图像识别能力,精确确定破坏试样的三维破坏面积,进而准确确定花岗岩点荷载强度。分析发现,花岗岩点荷载强度满足正态分布函数,取其均值作为该温度下花岗岩的点荷载强度。研究结果表明,花岗岩点荷载强度随着温度的升高而波动下降。本研究结果为硬岩受温度影响的力学机制研究提供了参考和依据,并为不同海拔地区矿山工程机械作业优化仿真研究提供支撑。

For the optimization simulation of mining machinery operations at different altitudes,it is necessary to accurately determine the mechanical parameters of in-situ rocks at different altitudes affected by temperature.In this paper,the common granite in mine engineering is taken as the research object,and a series of point load tests of granite at different temperatures are carried out in the high-low temperature laboratory of Guangxi Liugong Machinery Co.,Ltd.Based on the image recognition ability of 3D scanning equipment with the precision of 0.001mm,the 3D failure area of the failure granite is accurately determined,and then the point load strength of the granite is accurately determined.Based on the analysis,the point load strength of granite satisfies the normal distribution function,and the mean value is taken as the point load strength of granite at this temperature.The results show that the point load strength of granite decreases with the increase of temperature.The research results provide a reference and basis for the analysis of the mechanical mechanism of hard rock affected by temperature,and provide a support for the optimization simulation of mine engineering machinery operation in different altitude areas.