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| 1 | Development of a multivariate empirical model for predicting weak rock mass modulus显示文摘Estimating weak rock mass modulus has historically proven difficult although this mechanical property is an important input to many types of geotechnical analyses. An empirical database of weak rock mass modulus with associated detailed geotechnical parameters was assembled from plate loading tests performed at underground mines in Nevada, the Bakhtiary Dam project, and Portugues Dam project. The database was used to assess the accuracy of published single-variate models and to develop a multivariate model for predicting in-situ weak rock mass modulus when limited geotechnical data are available.Only two of the published models were adequate for predicting modulus of weak rock masses over limited ranges of alteration intensities, and none of the models provided good estimates of modulus over a range of geotechnical properties. In light of this shortcoming, a multivariate model was developed from the weak rock mass modulus dataset, and the new model is exponential in form and has the following independent variables:(1) average block size or joint spacing,(2) field estimated rock strength,(3) discontinuity roughness, and(4) discontinuity infilling hardness. The multivariate model provided better estimates of modulus for both hard-blocky rock masses and intensely-altered rock masses. | Kallu Raj R. Keffeler Evan R. Watters Robert J. Agharazi Alireza | 2015 | International Journal of Mining Science and Technology2015，25，4： | 2 |
| 2 | Inflatable rock bolt bond strength versus rock mass rating (RMR): A comparative analysis of pull-out testing data from underground mines in Nevada显示文摘The purpose of this paper is to establish confidence in anticipated minimum bond strength for inflatable rock bolts by comparing the bond strength to variable geotechnical conditions using the rock mass rating(RMR) system. To investigate a correlation between these parameters,the minimum bond strength of pull-out tested inflatable rock bolts was compared to the RMR of the rock in which these bolts were placed. Bond strength vs. RMR plots indicate that expected minimum bond strength is positively correlated with RMR; however,the correlation is not strong. Cumulative percent graphs indicate that 97% of pull-out tests result in a minimum bond strength of 3.3 and 1.7 ton/m in RMR P 45 and <45,respectively.Although lower bond strengths are more commonly encountered in low RMR ground,high bond strengths are possible as well,yielding higher variability in bond strengths in low RMR ground. Bond strength of friction bolts relies on contact between the rock bolt and drill hole. Experience in Nevada indicates that RMR is known to affect both the quality and consistency of drill holes which likely affects bond strength. Drilling and bolting in low RMR ground is more sensitive to drilling and bolting practices,and strategies for maximizing bond strength in these conditions are discussed. | Barnard Chase Kallu Raj R. Warren Sean Thareja Rahul | 2016 | International Journal of Mining Science and Technology2016，26，1： | 2 |
| 3 | Development of biofuels for the UK automotive market显示文摘 | Hammond G P Kallu S Manus M C | 2008 | Applied Energy2008，85，6： | 1 |
| 4 | New fractures after verteroplasty显示文摘 | Trout A T Kallues D F Kaufmann T J | 2006 | Am J Neuroradiol2006，27，1： | 1 |
| 5 | Precise topography-and aperture-dependent Motion compensation for airborne SAR 显示文摘 | Camare De Macedo Kallus A Roll Seheiber | 2005 | IEEE Geosciences and Remote Sensing Letters2005，2，2： | 1 |
| 6 | The intestinal microbiota and obesity显示文摘 | KALLUS SJ BRANDT LJ | | 0，，01： | 1 |
| 7 | Data-driven robust optimization显示文摘 | Bertsimas D Gupta V Kallus N | 2013 | Eprint Arxiv2013，，： | 1 |
| 8 | Development of biofuels for the UK automotive market 显示文摘 | Hammond G P Kallu S McManus M C | 2008 | Appl Energy2008，85，6： | 1 |
| 9 | The Intestinal Microbiota and Obesity显示文摘 | Samuel J. Kallus Lawrence J. Brandt | 2012 | Journal of Clinical Gastroenterology2012，，1： | 1 |
| 10 | Correlations between direct and indirect strength test methods显示文摘The difficulties associated with performing direct compression strength tests on rocks lead to the development of indirect test methods for the rock strength assessment. Indirect test methods are simple, more economical, less time-consuming, and easily adaptable to the field. The main aim of this study was to derive correlations between direct and indirect test methods for basalt and rhyolite rock types from Carlin trend deposits in Nevada. In the destructive methods, point load index, block punch index, and splitting tensile strength tests are performed. In the non-destructive methods, Schmidt hammer and ultrasonic pulse velocity tests are performed. Correlations between the direct and indirect compression strength tests are developed using linear and nonlinear regression analysis methods. The results show that the splitting tensile strength has the best correlation with the uniaxial compression strength.Furthermore, the Poisson's ratio has no correlation with any of the direct and indirect test results. | Kallu Raj Roghanchi Pedram | 2015 | International Journal of Mining Science and Technology2015，25，3： | 1 |
| 11 | Clinical evaluation of angulated abutments for the Bmemark system: a pilot study 显示文摘 | Henry P Jemt T | 1990 | Int J Oral Maxillofac Implants1990，5，1： | 1 |
| 12 | Preparation of thin supported MFI membranes by in situ nucleation and secondary growth显示文摘 | ALGIERI C GOLEMME G KALLUS S | 2001 | Micropor Mesopor Mater2001，47，23： | 1 |
| 13 | 显示文摘 | Golemme G Kallus S | 2001 | Microporous and Mesoporous Materials2001，47，23： | 1 |
| 14 | Loose gold screws frequently occur in full-arch fixed prostheses supported by osseointegrated implants after 5 years显示文摘 | Kallus T Bessing C | 1994 | Int J Oral Maxillofac Implants1994，9，2： | 1 |
| 15 | Loose Gold Srews Frequently Occur in Full-arch Fixed Prostheses Supported by Osseointegrated Implant After 5 Years显示文摘 | Kallus T Bessing C | 1994 | Int J Oral Maxillofac Implants1994，9，： | 1 |
| 16 | From colonial to national landscape:producing Haifa?s cityscape显示文摘 | Kolodney Z Rachel Kallus | | 0，，03： | 1 |
| 17 | Tooth transplantations:a descriptive retrospective study显示文摘 | Kallu R Vinckier F Politis C | 2005 | Int J Oral Maxillofac Surg2005，34，： | 1 |
| 18 | Tooth transplantations: a descriptive retrospective study 显示文摘 | Kallu R Vinckier F Politis C | 2005 | Int J Oral Maxillofac Surg2005，34，7： | 1 |
| 19 | Attention, psychomotor functions and age显示文摘 | Konrad Wolfgang Kallus Jeroen A. J. Schmitt David Benton | 2005 | European Journal of Nutrition2005，，8： | 1 |
| 20 | The Intestinal Microbiota and Obesity显示文摘 | Kallus SJ Brandt LJ | 2012 | J Clin Gastroenterol2012，46，1： | 1 |
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