In many times, a good distribution and implementation of equipment and machines along the quarry
faces is considered a challenge to the mining engineer or the quarry operator. Quarry equipment
includes drilling machines, air compressors, loading equipment including loaders and/or excavators,
in addition to the transportation fleet of high-tonnage trucks. These equipment cost large
investments in the production processes and need high skill to be efficiently distributed and
operated. In this investigation, study of the optimum distribution of the available drilling machines
of different specifications and capacities along the faces of the lime stone quarry of Assiut Cement
Company has been carried out. A mathematical model has been used to find several alternatives and
to choose the best alternative. Calculation of the minimum number of drilling machines that satisfy
the annual production plan is an important step to decrease production costs.