The estimation of uniaxial compressive strength conversion factor of trona and interbeds from point load tests and numerical modeling

Prediction of the uniaxial compressive strength and Brazilian tensile strength of weak conglomerate

“…There are various studies in the literature proposing relationship between I s(50) and UCS on different rock types but not on conglomerates individually: Oztruk and Altinpinar [6], Ferentinou and Fakir [7], Basu et al [8], Akram and Bakar [9], Quane and Russel [10], Kahraman [11], Fener et al [12], Basu and Aydin [13], Agustawijaia [14], Cobanoglu and Celik [15], Sabatakakis et al [16], Kahraman and Gunaydin [17]. Table 1 lists some of the equations correlating the UCS to I s(50) .…”

Point Load Test of Half‐Cylinder Core Using the Numerical Model and Laboratory Tests: Size Suggestion and Correlation with Cylinder Core

“…erefore, we adopted two calculation procedures for the half-cylinder cores. Method 1 (M1) was based on the calculation procedure of diametral PLT on cylinder cores, formulae (1) and (2). Method 2 (M2) was based on the calculation procedure of PLT on irregular lumps, formulae (1) and (3).…”

“…At the same time, in order to reduce the complexity of the DEM micromechanical parameter calibration, we selected three kinds of rock as shown in Table 1 (number 2 porphyritic granodiorite, number 3 granodiorite, and number 10 granodiorite porphyry) as the calibration objects. e DEM [28] of structures in rock or soil required calibration of the FJM parameters of materials using UCS tests [2,[32][33][34][35][36][37][38]. To simulate rocks with different UCS and PLSI, the tensile strength and cohesion of the FJM parameters were varied, while other parameters were kept constant.…”

“…For these reasons, the PLT is a more practical, time-saving, and economical method compared to the uniaxial compressive strength (UCS) test. e PLT is based on breaking a rock specimen, which is subjected to an increasingly concentrated point load applied through a pair of conical platens [2]. Failure load, rock size, rock shape, and loading mode are used to calculate the point load strength index (PLSI or Is (50) ) [3,4].…”

“…Failure load, rock size, rock shape, and loading mode are used to calculate the point load strength index (PLSI or Is (50) ) [3,4]. e PLSI is an important strength parameter index for the classification of rock strength [4][5][6][7], determination of UCS [1][2][3][4][8][9][10][11][12][13][14], and estimation of strength anisotropy [4,11,[15][16][17].…”