Limestone Extraction – Underground Mining Techniques
A foremost element of the mining process is breaking up the rock. this breakup is accomplished by detonating volatiles set in blast holes. the rock face to be gusted is typically 40-feet in width by 20- to 25-feet high. a premeditated pattern of 40 to 50 horizontal holes are drilled for the dimensions of 2 inches wide by 12- to 14-feet.