Issam ROUAIGUIA EXPERIMENTATION OF A BLASTING THEORY FOR THE DIGGING OF AN UNDERGROUND HORIZONTAL EXCAVATION FROM BOUKHADRA IRON MINE ( EASTERN ALGERIA )

The digging of horizontal mining excavations where the rock is hard requires an appropriate blasting plan. Thus the recognition of all the parameters that affect the latter including section, advancement and stability of the structure. to do this, a test of a theory at the level of the iron mine of Boukhadra, based on the assurance of creation for another liberation surface inside the front to be cut down; in order to improve the progress of the construction site due to the reduction of the specific explosive consumption, also in order to avoid the back effect after blasting which negatively influences the desired section shape.