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TECTONIC DISTURBANCES, ESTONIAN OIL SHALE DEPOSIT JURI-RIVALDO PASTARUS(a) ... (PLT) allows the determination of the uncorrected point load strength index Is. It must be corrected to the standard equivalent ... (UCS), index-to-strength conversion factors are used. These factors …

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Utilizing the strength conversion factor in the estimation of uniaxial compressive strength from the point load index ... It was shown that the average UCS/PLI ratio for three limestone sites was 14.3, which was low ... Utilizing the strength conversion factor in the estimation of uniaxial compressive strength from the point load index ...

01_Corelation UCS and Point Load Index | Strength Of ...

01_Corelation UCS and Point Load Index. For Later. save. Related. ... The index-to-strength conversion factor (k) relating UCS to Is(50) was reported to depend on the compressive to tensile strength ratio. ... [13] J. J. 140. The UCS versus Is(50) correlation for Dandot Sandstone. Sakessar Nodular Limestone and Marl (Group B rocks) was also ...

A dynamic point-load test for quantifying rock dynamic ...

The point-load test (PLT) has been widely used in the field and in the laboratory to estimate the strength of rock materials. The PLT is easy and quick to perform and it is suitable for samples with irregular shapes and therefore has found wide applications.

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plt conversion factor ucs for line grinding mill equipment. 4 Likelihood ratio confidence bounds and PLT specimens were transformed to UCS strengths with conversion factorGamma 4 LIKELIHOOD RATIO CONFIDENCE ... unconfined compressive strength dolomitic limestone.

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For example, the PLT to UCS conversion factor can vary from as low as 8 to as high as 30, while the ITS to UCS conversion factor values vary between 2.7 and 50 [43,44]. This implies that the conversion factor is a rock characteristic parameter and not a universal value; therefore, its applicability must be assessed on a case by case basis.

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Conversion of point load test results to conventional a strength tests for shale, claystone and limestone rocks. ... The conversion factors between UCS and PLA proposed . ... point load test (PLT ...

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Quartzite. 300 ... Field test for compressive strength of soils and rocks. Term. ... The presence of vesicles within basalt has a direct impact on the unconfined compressive strength (UCS) of the intact rock. Over 130 ... compressive strength (UCS) and to propose appropriate Is50 to UCS conversion factors ... determination of rock ...

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For these reasons, the PLT is a more practical, time-saving, and economical method compared to the uniaxial compressive strength (UCS) test. The PLT is based on breaking a rock specimen, which is subjected to an increasingly concentrated point load applied through a pair of conical platens .

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Two different methods were used to determine the conversion factor between UCS and PLTI. One method was employed to determine the conversion factor for each sample separately. For example, for finding the value from PLTI normal to UCS for oil shale, the conversion factor was 14.0 [+ or -] 5.4 with a probability of 95% (Table 1).

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USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL COMPRESSIVE STRENGTH OF COAL MEASURE ROCK - Download as PDF File (.pdf), Text File (.txt) or read online. ... USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL COMPRESSIVE STRENGTH OF COAL. MEASURE ROCK John Rusnak, Director of Geology ... appropriate Is50 to UCS conversion factors …

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01_Corelation UCS and Point Load Index | Strength Of ...

The index-to-strength conversion factor (k) relating UCS to Is(50) was reported to depend on the compressive to tensile strength ratio. For other rocks: qu= 8. For coal measure rocks: qu= 23.

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compressive strength (UCS) and point load strength (PLS), called the strength conversion factor (k), has been used to estimate the UCS from the PLS since the 1960s. Many researchers have investigated the relationship between UCS and PLS for various rock types, such as igneous, sedimentary, and metamorphic rocks,

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Figure 1. The Point Load Tester. USING THE POINT LOAD TEST ...

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 is sufficient.

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USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL COMPRESSIVE STRENGTH OF COAL ... appropriate Is50 to UCS conversion factors for different coal measure rocks. The rock strength determined by the PLT, like ... In general, the variability in the PLT-UCS relationship can

(PDF) Correlation between uniaxial strength and point load ...

Correlation between uniaxial strength and point load index of rocks ... regression method for determination of the conversion factor for each rock type. ... UCS/mean PLT) increases the k factor ...

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Various studies in the literature propose relationships between I s50 (from point load test) and UCS, thus objective of this study is to determine conversion factors relating I s50 and UCS for intact sedimentary rocks, as well as for conglomerates and breccias, since to those rocks, specimen with geometric characteristics for the USC test ...

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This index can be used to estimate other rock strength parameters. The focus of this paper is to present the data analysis used to correlate the point load test index (Is50) with the uniaxial compressive strength (UCS), and topropose appropriate Is50 to UCS conversion factors for different coal measure rocks.

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conversion factor of 21.9 gives better results than 23. The conversion factor given by Rusnak and Mark (1999) for limestone is 21.9, which is also quite close to the test results, but the conversion factor given for shale (21.8) is quite high compared with our results. Hassani et al. (1980) reported a conversion factor of 29 for sedimentary rocks,

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Plt-ucs . Páginas: 5 (1110 palabras) Publicado: 23 de agosto de 2010. USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL COMPRESSIVE STRENGTH OF COAL MEASURE ROCK ... (UCS), and topropose appropriate Is50 to UCS conversion factors for different coal measure rocks. The rock strength determined by the PLT, like the load frame strengths that ...

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Correlation between uniaxial strength and point load index of rocks ... regression method for determination of the conversion factor for each rock type. ... UCS/mean PLT) increases the k factor ...

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A Study on the Correlation between Uniaxial Compressive ...

Indirect tests such as the point load test (PLT) can be a useful alternative. In this study, correlation between the UCS and the point load strength index of limestone of Imgye area was analyzed, and the linear regression equation obtained from regression analysis of two variables was suggested.