Determination Of Physico-Mechanical Properties of Petra Quarry Granite Rock Type Ihievbe, Edo State
Publication Date: 12/10/2020
Author(s): Jethro Michael Adebola, Agbalajobi Sunday Ayodele, Ogbodo David Ajayi.
Volume/Issue: Volume 3 , Issue 1 (2020)
Abstract:
This research work determined the physico-mechanical properties of Petra quarry granite rock type, Ihievbe, Edo State, Nigeria. Five (5) samples were obtained from the quarry and subjected to various laboratory analyses to determine their Uniaxial Compressive Strength, Point load index, Hardness, porosity and density. Five (5) cubic samples were analyzed for Uniaxial Compressive Strength (UCS) with result ranging from 25.75MN/m2 to 101.08MN/m2. Five core samples were collected from five bore holes with three core samples each from each bore hole for point load test (PLT) with result ranging from 0.36MN/m2 to 3.69MN/m2. Average Hardness test ranges from 47 to 56. Effective porosity result ranges from 0.1% to 0.9%. Bulk Density results ranges from 1.5Mg/m3 to 3.8Mg/m3. Based on the results, the UCS values confirmed that the rock is extremely strong, and on the basis of International Rock Index Correlation indicates that Point load index ranging from 0.36MN/m2, to 3.69MN/m2 is of high strength and hence requires high explosives to obtain proper fragmentation. The results also show that the rock has a low porosity which will enhance the efficiency of blasting operation and the rock has a low density which will facilitate the displacement of rock mass fragmented by blasting. The result showed there is a great relationship between the uniaxial compressive strength and point load index as indicated in the correlation equation as UCS=23.276IS + 15.655 with R2 = 0.9827 as conformed with the internationally accepted value as UCS=24Is.
Keywords:
Analysis, Blasting, Bulk Density, Correlation, Fragmentation, UCS, Porosity
