The Point Load Tester. USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL COMPRESSIVE STRENGTH OF COAL MEASURE ROCK John Rusnak, Director of Geology Peabody Group St. Louis, MO Christopher Mark, Rock Mechanics Team Leader National Institute for Occupational Safety and Health Pittsburgh, PA ABSTRACT Point …
Rock engineering tasks like tunnelling, dam and building construction, and rock slope stability rely heavily on properly estimating the rock's uniaxial compressive strength (UCS), a crucial rock geomechanical characteristic. As high-quality specimen are not always possible, scientists often estimate UCS indirectly. The primary objective of …
DOI: 10.33536/jg.v9i1.822 Corpus ID: 238700697; Korelasi Point Load Index dan Uniaxial Compressive Strength pada Satuan Batupasir dan Batulempung Formasi Latih untuk Penentuan Koefisien Kekuatan Batuan di Pit X Tambang Batubara PT Berau Coal, Kalimantan Timur
Reichmuth, D. R. (1968): Point-load testing of brittle materials to determine tensile strength and relative brittleness. In: Proc., 9 th Symposium on Rock Mech. 134–159.
Uniaxial compressive strength (UCS) is a crucial mechanical parameter in the mining, construction, and petroleum industries. However, determination of the UCS is very tough, expensive, time-consuming, and destructive, requires expert workers for sample preparation, and cannot be determined in the field. As a result, prior researchers have …
strength of coal, such as the point load test (PLT) and the in-situ Schmidt hammer test (ISHT). The acronym ISHT refers to Schmidt hammer tests that were conducted in-situ on coal pillar ribs, while
An easy method for determining standard point load strength I s50 from the test results obtained from a number of irregular and regular prismatic specimens of different ... Kirtland Base, New Mexico (1966) Google Scholar. Diamantis et al., 2009. ... Using the point load test to determine the uniaxial compressive strength of coal …
E-ISSN 2541-2116 ISSN 2443-2083 Jurnal Geomine, Volume 9, Nomor 1: April 2021, Hal. 9 - 16 Korelasi Point Load Index dan Uniaxial Compressive Strength Pada Satuan Batupasir dan Batulempung Formasi Latih Untuk Penentuan Koefisien Kekuatan Batuan di Pit X Tambang Batubara PT Berau Coal, Kalimantan Timur Yan Adriansyah1*, Guruh …
Using the point load test to determine the uniaxial compressive strength of coal measure rock S.S. Peng, C. Mark (Eds.), Proceedings of the 19th International …
For the UCS and the SHR a strong linear correlation was also found (r = 0.84) (Fig. 21b). This degree of correlation is in agreement with the literature consulted, as the correlation coefficients ...
This study involved the extensive load frame and point load testing of coal measure rocks in six states. More than 10,000 individual test results, from 908 distinct rock units, were used in the study.
Korelasi Point Load Index dan Uniaxial Compressive Strength Pada Satuan Batupasir dan Batulempung Formasi Latih Untuk Penentuan Koefisien Kekuatan Batuan di Pit X Tambang Batubara PT Berau Coal, Kalimantan Timur. Jurnal Geomine, 9(1): 9-16. Bieniawski, Z. T. 1975 . The Point Load Strength Test in Geological Practice.
Point load testing is used to determine rock strength indexes in geotechnical practice. The point load test apparatus and procedure enables economical testing of core or lump rock samples in …
The point load test apparatus and procedure enables economical testing of core or lump rock samples in either a field or laboratory setting. In order to estimate uniaxial compressive strength, …
Range of compressive strength for U.S. coal measure rocks [Rusnak and Mark 2000]. ... Using the point load test to de termine the. uniaxial compressive str ength of coal measure rock. In: P eng SS ...
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 ...
equal to 50 mm, a correction is required (Fi gure 3). The unconfined co mpressive strength q u is related to the point load index with 50 mm cores Is50 as follows Beside the diametral test, the axial test and the irregular lump test have also been proposed (see Figures 2b and 2c). Strength anisotropy can also be assessed by using the point load ...
Statistical equations have been determined for estimating the mechanical properties of rocks using non-destructive and indirect test methods. Nineteen different …
The point load strength tests were performed according to the procedures suggested by [21] using equations: ...
2.2 Point Load Strength Index (Is 50). The point load test has been considered among the cheap and useful testing method for estimation of the strengths of …
2.2 Point Load Strength Index (Is 50). The point load test has been considered among the cheap and useful testing method for estimation of the strengths of rocks because of its ease of testing, simplicity of specimen preparation, and potential field applications (Broch and Franklin 1972; Bieniawski 1975; Kahraman and Gunaydin 2009; …
Corresponding point load strength index for the standard core size of 50 mm (I s50) diameter is given by the following equation. I s50 = (P*1000)/(D 1.5 √50) MPa. Uniaxial compressive strength of rock may be predicted from the following equation. q c = 22*I s50 Mpa. Report. The corrected mean value of the point load strength index I s50 …
Uniaxial compressive strength (UCS) is one of the most significant geomechanical properties of rock, being of importance in civil engineering, mining, geotechnical, and infrastructure projects, etc. The UCS is a useful approximate parameter when considering a variety of issues encountered during blasting, excavation, and …
Estimation of uniaxial compressive strength from point load strength, Schmidt hardness and P-wave velocity _Ibrahim C ¸ obanog˘lu Æ Sefer Beran C¸elik Received: 22 October 2007/Accepted: 29 March 2008/Published online: 15 May 2008 Springer-Verlag 2008 Abstract Uniaxial compressive strength is considered
In this study, the agreement rate between point load strength test values obtained as a result of laboratory experiments and UCS values was found as 81.59%. ... Problems and promises of index testing of rocks. In: 33rd U.S. Symposium on Rock Mechanics, Santa Fe, New Mexico, June USRMS 1992, pp 879–888 ... Using the point …
the strength of coal generally shows anisotropic features as loaded in different directions.6–8 Coal mining is a time and ... ally positively correlated with the UCS,54 point load strength index,55 and SCH Schmidt hammer rebound number.56 By taking advantage of this feature, specimens with an axial P- ...
Published data on 48 different rocks are used to evaluate the correlations between the uniaxial compressive strength (UCS) values and the corresponding results of point load, Schmidt hammer, sound velocity and impact strength tests. The variability of test results for each test and each rock type was evaluated by calculating the coefficient …
study involved the extensive load frame and point load testing of coal measure rocks in six states. More than 10,000 ... strength, point load index, triaxial compressive strength, flexural
The point load test was repeated at least six times for each rock type and the average value was recorded as the point load strength.Porosity values were …
A series of uniaxial compression test, Brazilian test, crushing compression test and point load test on coal samples from Zhangcun mine 3 # coal seam were carried out.
Table 4 shows the conversion factors (K) obtained from zero-intercept regression analyses on various subsets of the data. Nearly all the K values lie between 20 and 22, regardless of rock type or geographic origin. Figures 6a-6e shows the regression equation (equation 5) mapped on the different data subsets. - "Using the point load test …
These tests included Compressive Strength (UCS), Tensile Strength (UTS), Point Load Test (PLT), Schmidt Hammer test (SHT), Ultrasonic Pulse Velocity (UPV), Specific Gravity, Water Absorption, and ...
Cite this article. Fener, M., Kahraman, S., Bilgil, A. et al. A Comparative Evaluation of Indirect Methods to Estimate the Compressive Strength of Rocks.
1. Introduction. Uniaxial compressive strength (UCS) is perhaps the material property that is most frequently quoted in rock engineering (Hoek, 1977).In recent years, the trend has been to replace laboratory UCS tests with simpler, faster, "indirect" methods such as the point load test (Cargill & Shakoor, 1990, Karacan, 2009b a).Sonic logging has …