Web23 Mar 2024 · This research was conducted to forecast the uniaxial compressive strength (UCS) of rocks via the random forest, artificial neural network, Gaussian process regression, support vector machine, K-nearest neighbor, adaptive neuro-fuzzy inference system, simple regression, and multiple linear regression approaches. Web1 Dec 2024 · Author(s): Qi Ma; Yidong Zhang (corresponding author) [*]; Zexin Li; Yu Zheng; Guangyuan Song; Lei Hu 1. Introduction Coal resources as China’s main energy source have remained unchanged for a long time, according to the characteristics of China’s energy storage status for resources such as oils, gases, and coal [1,2].
Modelling of intact and jointed mudstone samples under
Web22 Nov 2024 · The D UCS of mudstone is larger than that of sandstone. For example, when the value of N reached 10, the D UCS of sandstone and mudstone were 43.88%, 52.55%, respectively. In addition, the relationship between the D UCS of sandstone and mudstone and the value of N + 1 could be fitted by a logarithmic curve as follows: Webformula for the calculation of the UCS based on corrected Is to a specimen diameter of 50 mm Is(50). The index-to-strength conversion factor (k) relating UCS to Is(50) was reported to depend on the compressive to tensile strength ratio, the Poisson’s ratio, the length and the diameter of the rock specimen. Their theoretical prediction for k=14.9 lamanburg flag cape
Point load testing of weak rocks with particular reference to chalk
Webstudy shows that the UCS values of WHOIF generally range from strong 83.7 MPa to very strong 153.7 ... and mudstone components of the NF in Khartoum state (Yousif, 1985; Elsharief et al., 2015; Abdul and Mutasim, 2024), whereas very little is … WebAbstract Face squeezing, floor heave, and buckling of invert were found after a 10-day holiday in 2014 around the serpentinite face of a tunnel in Hokkaido, Japan. The damage continued for over 2 months, extending 400 m toward the entrance causing a massive roof fall. The tunnel was excavated again with a circular section and extra-thick shotcrete, and … http://www.fg.uni-mb.si/journal-ags/pdfs/ags_2014-2_article_3.pdf jer 19