几种岩石点荷载强度与单轴抗压强度的相关性

The Correlation Between the Point Load Strength and Uniaxal Compression Strength of Several Kinds of Rocks

通过对某矿区的矿岩进行单轴抗压强度试验及点荷载试验,用Shapiro-Wilk正态检验法对点荷载试验数据进行正态分布检验,用Grubbs准则对可疑数据进行取舍,再将得到的点荷载强度(I_(S(50))、PLS)与单轴抗压强度(UCS)进行对比分析,研究其相关性。结果表明:点荷载试验结果符合正态分布,其离散程度大于单轴压缩试验;6种岩石的点荷载强度与单轴抗压强度高度正相关,因此能够相互转换,转换得到的抗压强度可作为该矿山岩体分级的依据。

A series of uniaxial compression tests and point load tests on rock from a certain mine are made. The normal distribution tests of point load data have been carried out with the normality test method of Shapiro-Wilk,and the uncertain data are screened with the Grubbs criterion.Then,the result of point load strength（ IS（ 50）,PLS） and the uniaxial compression test（ UCS） are contrasted and analyzed.The results show that rock point load strength meets the criteria of normal distribution.The dispersion degree of point load test is larger than uniaxial compression test. The point load strength and uniaxial compressive strength of six kinds of rocks is positively relevant,which could be converted by each other.The compression strength obtained by conversion can be used as a reference of the mine rock classification.