Uniaxial compressive strength (UCS) is one of the most widely used rock mechanical parameters in rock engineering like design and construction of foundations, tunneling, slope stability investigations, etc. UCS is also the only parameter to assess rock material strength in Rock Mass Rating (RMR) proposed by Bieniawski (1989).However, …
WhatsApp: +86 18221755073Parameters of BPI and Is (50) were assigned by dividing UCS with the conversion factors obtained in this study. For SRH and V p, the membership function …
WhatsApp: +86 18221755073Basalt is an important geotechnical material for engineering construction in Southwest China. However, it has complicated structural features due to its special origin, particularly the widespread occurrence of hidden cracks. Such discontinuities significantly affect the mechanical properties and engineering stability of basalt, and related research …
WhatsApp: +86 18221755073The result for bulk density and UCS test for granite and limestone are listed in Tables 1 and 2.The bulk density value range from as low as 2.46 g/cm 3 to a high of …
WhatsApp: +86 18221755073The result for bulk density and UCS test for granite and limestone are listed in Tables 1 and 2.The bulk density value range from as low as 2.46 g/cm 3 to a high of 2.59 g/cm 3 for granite and between 2.48 to 2.68 g/cm 3 for limestone as summarised in Table 3.The UCS value ranges from 35.97 to 59.77 MPa for granite and from 9.41 to 42.06 …
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WhatsApp: +86 18221755073Granite 2.7 smaller equal GM smaller 2.7 smaller equal GM smaller The materials shall comply with the requirements of clause 3602. Basalt 125 35.
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WhatsApp: +86 18221755073They stated that there was no single conversion factor applicable to the full range of strengths in rock materials for the linear regression model and established …
WhatsApp: +86 18221755073Preparing desired smooth specimens from pyroclastic rocks is difficult and time consuming for some standard tests such as uniaxial compressive strength (UCS) test, since they are weak or soft rocks. For this reason, the development of some equations is important for predicting the UCS of pyroclastic rocks. A linear correlation was suggested for the …
WhatsApp: +86 18221755073Tested rock is taken from the granite material, after cutting and grinding, it is processed into a standard cylinder specimen of ϕ50 mm × 100 mm, which has a pair of non-parallel flaws cut by ...
WhatsApp: +86 18221755073The subsequent UCS test simulations on this specimen resulted in a nonlinear stress–strain curve attributed to crack closure. However, the resulting strength and deformation properties (with values of E = 63 GPa, UCS = 151 MPa) did not match those of damaged LdB granite (E = 54 GPa, UCS = 168 MPa).
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WhatsApp: +86 18221755073The labels of each line are UCS (MPa). from publication: On the loader productivity, rock strength and explosive energy in metal mining | Twenty production blasts in two open pit mines were ...
WhatsApp: +86 18221755073However, conversion factor k is non-unique (varies between 8 and 30 for PLS to UCS conversions and between 2.7 and 50 for the ITS to UCS conversion) and depends on the degree of anisotropy of the ...
WhatsApp: +86 18221755073Concluding remark is that the UCS-BPI conversion factor for the pyroclastic rocks is lower than the suggested general conversion factor of 5.5 and the UCS-BPI relation is best represented by power ...
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WhatsApp: +86 18221755073ck Schmidt Conversion Curve Database These conversion curves are generated from classical Schmidt hammer curves found in the literature using a conversion between …
WhatsApp: +86 18221755073The specimen is a cylindrical specimen at standard intact rock size with granite in the outside and backfill in the inside. The granite was sourced from the ore-bearing rock mass of the Shangshan Island Gold Mine, located in Shandong Province, China. It has a uniaxial compressive strength (UCS) of 83.79 MPa.
WhatsApp: +86 18221755073Download scientific diagram | Conversion factors correlating point loading and UCS for soft to strong sedimentary rocks (Sabatakakis and Tsiambaos, 2003). from publication: EFFECTS OF POROSITY ON ...
WhatsApp: +86 18221755073Cheng et al. (2013) studied the influence of the degree of saturation and soil particle size on the mechanical response of MICP treated two different types of pure silica sands (fine and coarse). A series of UCS tests were conducted on treated samples of 55 mm diameter with 1:1.5 to 1:2 height-to-diameter ratio.The samples treated with MICP …
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WhatsApp: +86 18221755073The findings indicate that using the conversion factor (k) recommended by ISRM to predict the UCS of rocks may significantly underestimate the actual strength of rocks in intricate mining ...
WhatsApp: +86 18221755073Kaya et al. [5] studied the transformation between UCS and I s (50) of three types of rocks, with the strength transformation factor k obtained by the zero-intercept regression analysis, formula ...
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WhatsApp: +86 18221755073Received: 26 August 2014/Accepted: 21 January 2015/Published online: 10 February 2015 Springer-Verlag Berlin Heidelberg 2015 Abstract The strength conversion factor (k) is the ratio between the uniaxial compressive strength (UCS) and the point load index (PLI). It has been used to estimate the UCS from the PLI since the 1960s. Many researchers have
WhatsApp: +86 18221755073The expansion of unconventional resource exploration emphasizes understanding source rock geomechanical properties for better development of these resources. Rock hardness, a critical factor, indicates compressive strength and influences various properties like Young's modulus. It is pivotal in drilling, aiding in estimating bit …
WhatsApp: +86 18221755073Tsiambaos and Sabatakakis (2004) analyzed the conversion factor between I S(50) and UCS of limestones as 13.0, Singh et al. (2012) obtained a conversion factor of 14.4 for …
WhatsApp: +86 18221755073According to (Galvan et al., 2014), the obtained conversion factor for PLT index to UCS range from 12 to 26. However, for conversion factor between point load and uniaxial compressive strength varies from 13 to 29 for soft sedimentary rocks with value of I s(50) lower than 2 MPa to I s(50) greater than 5 MPa (Irfan and Powell, 1991a).
WhatsApp: +86 182217550731. Introduction. Uniaxial compressive strength (UCS) for rocks plays a vital role in both preliminary and final design stages of rock and geotechnical engineering …
WhatsApp: +86 18221755073The Is(50) value is known to correlate well with UCS. Various studies have come out with correlation between UCS and Is(50) . It is found that the index-to-strength conversion factors are rock dependent. This study presents the correlation between UCS and Is(50) of granite rock samples originating from a site located at Seremban, Negeri Sembilan.
WhatsApp: +86 18221755073For 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.
WhatsApp: +86 18221755073This chapter contains sections titled: The SI System of Units The American Engineering System (AES) of Units Conversion of Units Unit Conversions Using the U-Converter Program Amount of Sub...
WhatsApp: +86 18221755073The findings indicate that using the conversion factor (k) recommended by ISRM to predict the UCS of rocks may significantly underestimate the actual strength of rocks in intricate …
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WhatsApp: +86 18221755073showed that the UCS–BPI conversion factor for the tested rocks was 3.1. This value is fairly lower than the suggested value. On the other hand, the correlation coefficients of power law functions are higher than that of the linear functions. Concluding remark is that the UCS–BPI con-version factor for the pyroclastic rocks is lower than ...
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