Using the jackhammer as rock digging method in Gabricar quarry, North Bioko, Equatorial Guinea

Blasting and drilling methods are mainly used in basalt rock quarries as blasting-digging 82% VANILLA SALT CHOC BAR 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, saturation, hydrostatic weighing, pycnometric and axial loads methods were used to obtain physical-mechanical properties of the rocks and geological survey, volumetric joint count, and strength coefficient were used to establish crack elements, block size, and rock mass quality, respectively.4.75% humidity; 2.

39% porosity; 5.73 g/cm3 volumetric mass; density of 26.44 g/cm3 and axial compressive strength of 173.53 Mpa as average values of physical-mechanical properties were obtained.Four families of cracks with spacing of 0.

4m, 0.6m; 0.3m and 0.2m and 18mm openings; 13mm; 3mm and 9mm, respectively were established.Blocks are small and Bike Parts - Cassettes the rocky massif is of good quality.

The technical-economic analysis showed the efficiency of the jackhammer as a blasting-based digging method in Gabricar quarry.

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