Investigating the Relationship between Various Brittleness Indexes with Specific Ampere Draw in Rock Sawing Process

Document Type : Research Paper


1 Department of Mining and Metallurgical Eng, Urmia University of Technology, Urmia, Iran

2 School of Mining, College of Engineering, University of Tehran, Iran

3 Faculty of Mining, Petroleum & Geophysics, Shahrood University of Technology, Shahrood, Iran

4 School of Mining, College of Engineering, University of Tehran, Tehran, Iran


This study aimed to develop new statistical models for evaluating the specific ampere draw (SI) based on rock brittleness index in rock sawing process. A variety of rocks, including carbonate and granite, were cut by a fully instrumented laboratory-sawing rig with two different types of circular diamond saws. Laboratory tests were performed at different depths of cut and feed rates. Multiple curvilinear regression analysis was utilized in order to estimate the SI from rock brittleness index and operational parameters. Validation of the developed models was checked by t and F tests. Results showed that among the different brittleness indexes, B3 has the best accuracy for both granite and carbonate rocks. Finally, it was concluded that the specific ampere draw can be reliably predicted using the proposed models for both hard and soft rocks.