Rajesh Kumar, B.R.Vardhan, H.Govindaraj, M.2026-02-052011Rock Mechanics and Rock Engineering, 2011, 44, 5, pp. 613-6207232632https://doi.org/10.1007/s00603-011-0160-7https://idr.nitk.ac.in/handle/123456789/27193The main purpose of the study is to develop a general prediction model and to investigate the relationships between sound level produced during drilling and physical properties such as uniaxial compressive strength, tensile strength and percentage porosity of sedimentary rocks. The results were evaluated using the multiple regression analysis taking into account the interaction effects of various predictor variables. Predictor variables selected for the multiple regression model are drill bit diameter, drill bit speed, penetration rate and equivalent sound level produced during rotary drilling (L<inf>eq</inf>). The constructed models were checked using various prediction performance indices. Consequently, it is possible to say that the constructed models can be used for practical purposes. © Springer-Verlag 2011.Interaction effectMultiple regression analysisMultiple regression modelPenetration ratesPrediction modelPrediction performancePredictor variablesRotary drillingSound levelUCSUniaxial compressive strengthBitsCompressive strengthDrillsForecastingMathematical modelsPorosityRegression analysisRock drillingSedimentologyStatisticsTensile strengthSedimentary rocksacousticscompressive strengthdrillingnumerical modelphysical propertyporositypredictionregression analysisrock mechanicssedimentary rocktensile strength