Optimal parameters of blasting destruction in the Ben Azouz quarry based on study of strenght limestone rock
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Date
2024
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Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu
Abstract
Purpose. This paper highlights the importance of taking into account the evaluation of the strength properties of limestone rock in the Ben Azzouz quarry. The purpose is to achieve optimum blasting quality based on the information on petrophysical and mechanical characteristics of the rock. Methodology. Models have been developed to estimate physicomechanical properties of limestone rock. The models are based on the results of many laboratory tests by petrophysical and mechanical methods. Statistical analysis was performed on simple and multiple regression equations. Findings. Linear regression models have a higher estimated success rate, as expected. The best model for estimating the com pressive strength of the rock (UCS, Uniaxial ompression Strength) based on simple regression is the model containing PVeloc ity as an independent variable with a coefficient of determination R2 of 0.81 and Pvalue = 0.000000003. Originality. To benefit from the enormous reserves in the quarry of Ben Azouz, knowing that there is no evaluation of the physicomechanical characteristics of the rock, a set of the tests in the rock mechanics laboratory of polytechnic faculty of Mons in Belgium was carried out and limestone rock strength was estimated. Practical value. to Solid understanding of the physical and mechanical characteristics of the rock mass and the mechanism of blasting the rock is an essential step that must be taken gradually according to the development of mining works with the aim of
minimizing the disadvantages in blasting and obtaining an optimal effectiveness.