An estimation of the penetration rate of rotary drills using the Specific Rock Mass Drillability index  

作　　者：Cheniany Alireza Hasan Khoshrou Seyed Shahriar Kourosh Khademi Hamidi Jafar 

机构地区：[1]Department of Mining and Metallurgy Engineering,Amirkabir University of Technology,Tehran,Iran [2]Mining Engineering Department,Faculty of Engineering,Tarbiat Modares University,Tehran,Iran

出　　处：《International Journal of Mining Science and Technology》2012年第2期187-193,共7页矿业科学技术学报（英文版）

摘　　要：The main purpose of the present study was to provide a practical, convenient drillability prediction model based on rock mass characteristics, geological sampling from blast holes, and drill operational factors. Empirical equations that predict drill penetration rate have been developed using statistical analyses of data from the Sarcheshmeh Copper Mine. Seven parameters of the rock or rock mass, including uniaxial compressive strength （UCS） of the rock, Schmidt hammer hardness value, quartz content, fragment size （dso）, alteration, and joint dip, are included in the model along with two operational parameters of the rotary drill, bit rotational speed and thrust. These parameters were used to predict values of the newly developed Specific Rock Mass Drillability （SRMD） index. Comparing measured SRMD values to those pre- dicted by the multi-parameter linear, or nonlinear, regression models showed good agreement. The cor- relation coefficients were 0.82 and 0.81. resoectively.The main purpose of the present study was to provide a practical,convenient drillability prediction model based on rock mass characteristics,geological sampling from blast holes,and drill operational factors.Empirical equations that predict drill penetration rate have been developed using statistical analyses of data from the Sarcheshmeh Copper Mine.Seven parameters of the rock or rock mass,including uniaxial compressive strength(UCS) of the rock,Schmidt hammer hardness value,quartz content,fragment size(d80),alteration,and joint dip,are included in the model along with two operational parameters of the rotary drill,bit rotational speed and thrust.These parameters were used to predict values of the newly developed Specific Rock Mass Drillability(SRMD) index.Comparing measured SRMD values to those predicted by the multi-parameter linear,or nonlinear,regression models showed good agreement.The correlation coefficients were 0.82 and 0.81,respectively.

关 键 词：Rotary drillingPenetration rateSpecific Rock Mass Drillability （SRMD） indexSarcheshmeh Copper Mine 

分 类 号：TD41[矿业工程—矿山机电]