Mohamed Fredj

University Abderahmane Mira, Bejaia, Mining and Geology Department, Faculty Member

Followers

Following

Co-authors

Public Views

https://fredj-mohamed-75.webself.net
Phone: (+213) 06 61 82 37 88
Address: University of Bejaia, Faculty of Technology, Mining and Geology Department
Road Targa Ouzemour, Bejaia (06000), Algeria

less

Rihab Hadji

Universite Farehat Abes Setif

Mira FILALI

Mahmoud djoudi

SAADOUN Abderrazak

University Abderahmane Mira, Bejaia

Federal University of Technology Akure

International Journal of Economic and Environmental Geology

University of Karachi

InterestsView All (13)

Uploads

Papers by Mohamed Fredj

Optimal Blast Design Considering the Effects of GeometricBlasting Parameters on Rock Fragmentation: A Case Study

In quarries and mines, the drilling and the blasting activities is an essentially fundamental way... more In quarries and mines, the drilling and the blasting activities is an essentially fundamental way of excavating rock. The blasting process is an integral and important part of mining operations and is intrinsically destructive for a variety of different reasons, notably efficiency, cost effectiveness and the capacity to shatter away even the most solid rock. The primary and main purpose of designing a blast pattern in an open pit or quarry is to use quantities of explosives to fragment the rock material down to smaller pieces and shapes that can make it easier to carry out various subsequent operations such as excavation, charging, transporting, crushing, grinding etc. The conception of a blasting model depends on two sorts of variables: firstly uncontrollable factors, such as the geological structure and the properties of the rock mass. Secondly controllable factors, such as the geometric model (height of the bench, length of the charge, diameter, spacing, burden, stemming length, etc.), the properties of the explosives used (type, resistance, energy, etc.) and the temporal parameters (time delay and initiation sequences). The different fragmentation blasting analysis procedures have inherent difficulties, which result in varying levels of accuracy. Consequently, each technique is adapted to a particular purpose. This research assessed and then compared the particle size distribution of limestone rocks from the New Cement Quarry (NCQ) at Setif-NE Algeria, using the Wip Frag computer imagery processing program and one of the empirical models called Kuz-Ram. Three blasts from the quarry, using different mesh designs in terms of load and spacing (rectangular, square and triangular) analyzed using the two methods. The design parameters of the blast obtained and evaluated as input to the Kuz-Ram model. Pictures of the pile taken and downloaded to the Wip Frag software for analysis. The obtained results in the case of a change in the geometrical parameters of the explosion show that a significant reduction in the size of the oversized products observed by the numerical method. Furthermore, in this study, the ratio between the spacing and the charge in the case of the triangular pattern has a major influence on the size of the fragments and makes it possible to make optimum use of the distribution principle and the amount of energy of the explosive.

Mohamed Fredj

Uploads

Papers by Mohamed Fredj

Log In