from the test results of SHI UCS and SDT are evalu-ated and the goodness of ﬁt of the models are explained by using intrinsic properties of rock ma-terial Also unlike previously mentioned researchers this research is focused on weak rocks shale only 4 The factors …

A conversion factor equal to 5 7 was established between UCS and BPI c This value is higher than the advised conversion factor of 5 1 Nevertheless the 5 1 conversion factor is proposed for general practice and is not exclusively advised for igneous and metamorphic rocks

from the test results of SHI UCS and SDT are evalu-ated and the goodness of ﬁt of the models are explained by using intrinsic properties of rock ma-terial Also unlike previously mentioned researchers this research is focused on weak rocks shale only 4 The factors …

The strength conversion factor k is the ratio between the uniaxial compressive strength UCS and the point load index PLI UCS and the point load index PLI The main purpose of

Estimation of uniaxial compressive strength of rock materials by index tests using regression analysis and fuzzy inference system Different indices were used to predict UCS of granite schist and sandstone Parameters of BPI and Is 50 were assigned by dividing UCS with the conversion factors obtained in this study

relationship between UCS and the point load strength could be expressed as UCS = K Is50 = 24 Is50 2 Where K is the conversion factor Subsequent studies found that K=24 was not as universal as had been hoped and that instead there appeared to be a broad range of conversion factors Table 1 summarizes published results obtained for

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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test size correction factor unconfined compression 1 INTRODUCTION The unconfined compression strength UCS is a funda-mental parameter that is often costly difficult or even impossible to determine through normalized testing 1 2 3 however it may be determined with a simple geologist hammer or with the Schmidt hammer among others 3

UCS indirectly index-to-strength conversion factors are constructed ISRM 1985 Richardson 1989 conducted a point load tests of cast specimens with various diameters as 50 8 76 2 and 101 6mm The advantages of using the point load test relate to a smaller cost per unit test when compared to

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

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The parameters for all the membership functions of the output i e UCS were assigned on the basis of the widely accepted strength classiﬁcation of rock material depending on UCS by and Miller 1966 Parameters of BPI and Is 50 were assigned by dividing UCS with the conversion factors obtained in this study

granite ucs conversion factor THE UNIAXIAL COMPRESSIVE STRENGTH OF SOFT ROCK factor of 24 as a correlation between UCS and I S 50 However this conversion factor is more effective for hard rock materials than soft rock materials The strength of soft rock materials is much lower than that of hard rock materials so the conversion factor

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Unit Conversion Calculators These Unit Conversion calculators allow you to easily convert between various Englisn and Metric units for length area volume weight temperature pressure and force The calculator will select the first non-blank value it encounters and convert that value to each of the other units on teh calculator s display

Correlation Between Point Load Index And Very Low Uniaxial Compressive Strength Of Some Iraqi Rocks UCS and to propose a ppropriate Is 50 to UCS conversion factors for different Iraqi

granite ucs conversion factor - ZCRUSHER granite UCS conversion factor sher Plant granite UCS conversion factor Correlation between uniaxial compressive strength … The ples of granite and Get Price converting dry crushers to wet plants

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Granite Ucs Conversion Factor Ellul Nl The uniaxial compressive strength of soft rock factor of 24 as a correlation between ucs and i s50 however this conversion factor is more effective for hard rock materials than soft rock materials the strength of soft rock materials is much lower than that of hard rock materials so the conversion

and III For each class a conversion factor was assigned to multiply with the point load strength index value in order to get the UCS value The ASTM D presented a correlation between UCS and I s 50 which is dependent on a site specific conversion factor C to multiply with the point load strength index value in order to get the UCS

Correlation of UCS Rating with Schmidt Hammer Surface Hardness for Rock Mass Classification Article PDF Available in Rock Mechanics and Rock Engineering 50 1 · July 2016 with 3 410 Reads

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For most rocks the conversion factor x ranges from 6 to 37 thus Broch-Franklin s conversion factor of 24 falls within this range but is by no means universal Our simple theoretical formula is then verified by our exper- imental results on granite and tuff found in Hong Kong

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We will concentrate on porosity as the primary controlling factor because it is routinely available from logs and is a fundamental input into reservoir simulators Relating compressive strength to porosity Numerous relationships have been developed to estimate C 0 often in conjunction with general rock strength relationships

formula 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

A study was conducted to compare all of the point load test PLT methods and their usefulness in practical applications The study presented the point load strength index PLSI obtained by three

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