A laboratory study of rock properties affecting the penetration rate of pneumatic top hammer drills

سال انتشار: 1393
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 643

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شناسه ملی سند علمی:

JR_JMAE-5-1_001

تاریخ نمایه سازی: 13 مرداد 1394

چکیده مقاله:

Having collected rock samples from eight mines and one high way slope, the researchers did some tests on the samples to determine dry density, Uniaxial Compressive Strength, tensile Strength (Brazilian Test), elastic modulus, Schmidt hammer rebound number. In addition, a thin section of each rock was studied to calculate the mean size of rock grains, quartz content, hardness and abrasivity. The rock samples were finally drilled using an actual pneumatic top hammer drilling machine with a 3½ inche diameter cross type bit. Regression analyses showed that Brazilian tensile strength (R2=0.81), uniaxial compressive strength (R2=0.77) and Schmidt hammer rebound (R2=0.73) have the most significant effect on drilling rate and have a relatively appropriate correlation with drilling rate.

کلیدواژه ها:

Drillability ، rock material ، physical and mechanical properties ، pneumatic top hammer drills

نویسندگان

S. H Hoseinie

Department of Mining Engineering, Hamedan University of Technology, Hamedan Iran

M Ataei

Faculty of Mining Engineering, Petroleum & Geophysics, Shahrood University of Technology, Shahrood, Iran.

A Aghababaie

Faculty of Mining Engineering, Sahand University of Technology, Tabriz, Iran