文献类型：期刊文献

英文题名：Experimental Study on Mudstone's Strength Characteristics in Deep-Buried Coal-Measure Formation: A Case Study of Permian Longtan Formation

作者：Li, Ke Yu, Weijian Xu, Youlin Lai, Long Zhang, Hui Xu, Mengtang Zhou, Ze

第一作者：Li, Ke

通信作者：Li, K[1];Li, K[2]

机构：[1]Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Hunan, Peoples R China;[2]Guizhou Inst Technol, Coll Min, Guiyang 550003, Guizhou, Peoples R China;[3]Hunan Univ Sci & Technol, Hunan Prov Key Lab Safe Min Tech Coal Mines, Xiangtan 411201, Hunan, Peoples R China;[4]Guizhou Panjiang Coal & Elect Grp Co Ltd, Panzhou 553599, Guizhou, Peoples R China

第一机构：Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Hunan, Peoples R China

通信机构：corresponding author), Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Hunan, Peoples R China;corresponding author), Guizhou Inst Technol, Coll Min, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院;

年份：2021

卷号：2021

外文期刊名：SHOCK AND VIBRATION

收录：;EI(收录号：20220411489239);Scopus(收录号：2-s2.0-85122995232);WOS:【SCI-EXPANDED(收录号:WOS:000719686000006)】；

基金：This research was financially supported by National Natural Science Foundation of China (Nos. 51974117 and 52174076), Hunan Provincial Natural Science Foundation of China (No. 2020JJ4027), New Talent Training Project of Guizhou Institute of Technology (No. GZLGXM-02), and Science and Technology Project for Outing and Young Talents of Guizhou (No. QKHPTRC[2019] 5674).

语种：英文

外文关键词：Coal - Compression testing - Compressive strength - Data handling - Quartz - Rock mechanics - Scanning - Scanning electron microscopy - Sedimentary rocks - X ray diffraction

摘要：To investigate the strength characteristics of mudstone in deep-buried coal-measure formation, four types of experiments have been conducted: (i) the X-ray diffraction (XRD) test; (ii) the scanning electron microscope (SEM) scanning test; (iii) the point load strength index test; and (iv) the uniaxial compressive strength test. It was concluded that the mudstone of the deep-buried coal measures in the Longtan Formation is dominated by chlorite, quartz, and albite using the XRD test, of which chlorite is primary, accounting for 74.3%. It was found that the three minerals in the mudstone are unevenly distributed using the SEM scanning test, albite is irregularly distributed in chlorite, and quartz is present in the albite and chlorite. Sixty-five specimens were tested for the point load strength index. After processing the data using the method suggested by the International Society for Rock Mechanics and Rock Engineering(ISRM), it was found that the maximum value of I-s(50) was 6.10 MPa, the minimum is 0.14 MPa, and 53% of the specimens' I-s(50) values are below 2.0 MPa. The RMT-150C rock mechanics testing machine was used to conduct uniaxial compression tests on six specimens. The maximum uniaxial compressive strength (UCS) value is 59.26 MPa, the minimum value is 31.77 MPa, and the average is 45.64 MPa. Linear fitting and logarithmic fitting are carried out for the correlation between UCS and I-s(50). The goodness of fit R-2 of the linear fitting is 0.863, and that of the logarithmic fitting is 0.919, indicating a strong correlation between them. When it is challenging to make standard specimens, I-s (50) can be used to estimate UCS.