摘要
为了研究某矿区层纹灰岩、结晶灰岩、千枚岩和砂岩点荷载强度和单轴抗压强度的关系,在大量点荷载试验和单轴抗压强度试验的基础上,通过相差系数分析了点荷载试验得到的抗压强度与室内单轴抗压强度的接近性,同时分析了各岩性的点荷载转化系数。结果表明:4种岩石的点荷载试验强度与单轴抗压强度之间的转换系数不同,并且差异较大,除了砂岩点荷载强度转化系数接近经验值22,其他3类岩石的点荷载强度转化系数均小于经验值,这与结构面分布情况和点荷载加载方向有关。
In order to study the relationship between point load strength and uniaxial compressive strength of laminated limestone,crystalline limestone,phyllite and sandstone in a mining area,based on a large number of point load tests and uniaxial compressive strength,the similarity between point load test and indoor uniaxial compressive strength is analyzed by difference coefficient,and the point load conversion coefficient of each lithology is analyzed.The results show that the conversion coefficient between point load test strength and uniaxial compressive strength of four kinds of rocks are different,and the difference is large.Except that the conversion coefficient of point load strength of sandstone is close to the empirical value of 22,the conversion coefficient of point load strength of other three kinds of rocks is less than the empirical value,which is related to the distribution of structural planes and the direction of point load.
作者
郭延辉
侯克鹏
蒋军
牛向东
GUO Yanhui;HOU Kepeng;JIANG Jun;NIU Xiangdong(College of Civil and Architectural Engineering,Yunnan Agricultural University,Kunming 650201,Yunnan,China;Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China)
出处
《中国钨业》
CAS
2019年第5期13-17,共5页
China Tungsten Industry
基金
国家自然科学基金面上项目(41672303)
云南省科技厅应用基础研究面上项目(2018FB075)
中国博士后科学基金项目(2017M620433)。
关键词
点荷载强度
单轴抗压强度
转化系数
相关性系数
point load strength
uniaxial compressive strength
conversion coefficient
correlation coefficient