Blasting and drilling methods are mainly used in basalt rock quarries as blasting-digging methods. The purpose of this study is to argue the validity of using a jackhammer as a rock removal method in Gabricar quarry. based on knowing the geomechanical parameters of rocks as well as the technical-economic indicators for exploitation. Gravimetric. http://thebrickes.shop/product-category/patio-dining-table/