颚式破碎机在花岗岩采掘中受岩石强度性能的影响外文文献翻译、中英文翻译.docVIP

PAGE PAGE 20 Influence of some rock strength properties on jaw crusher performance in granite quarry Abstract：The influence of rock strength properties on Jaw Crusher performance was carried out to determine the effect of rock strength on crushing time and grain size distribution of the rocks．Investigation was conducted on four different rock samples namely marble．dolomite．1imestone and granite which were representatively selected from fragmented lumps in quarries．Unconfined compressive strength and Point load tests were carried out on each rock sample as well as crushing time and size analysis．The results of the strength parameters of each sample were correlated with the crushing time and the grain size distribution of the rock types。The results of the strength tests show that granite has the highest mean value of 101.67 MPa for Unconfined Compressive Strength(UCS)test．6.43 MPa for Point Load test while dolomite has the least mean value of 30.56 MPa for UCS test and 0.95MPa for Point Load test.According to the International Society for Rock Mechanic OSRM)standard．The granite rock sample maybe classified as having very high strength and dolomite rock sample，low strength．Also，the granite rock has the highest crushing time(2 1．O s)and dolomite rock has the least value(5．0 s)．Based on the results of the investigation，it was found out that there is a great influence of strength properties on crushing time of rock types． 1 Introduction Jaw crushers are used for reducing the size of solid material, such as mineral material for example in mining industry. Usually jaw crushers comprise two vertical jaws, where the first jaw is fixedly mounted and the second jaw is arranged movable to and fro relative to the first jaw. The material to be crushed is fed between the jaws and subjected to the pressing and relieving actions of the moving jaw. The jaws are arranged in tapered manner so that they are farther apart at the top than at the bottom, and the material, which i