Influence of natural discontinuities and mechanical properties on the fragmentation of marble by blasting in Central Africa

Natural discontinuities as well mechanical properties are the difficult-to-control parameters that significantly influence fragmentation of marble after blasting. In Central Africa, Bidzar quarry is only one producing marble, plagued for decades by block problems, requiring multiple blasts cause huge costs and environmental problems. The objective this study to predict rock improve its geological knowledge using Kuz–Ram method. Thus, blastability a function dip discontinuity planes powder factor, compressive strength drilling mesh were studied. results obtained show that, heterogeneous, consisting mainly fissured medium hardness. Its about 85°, factor 10.455 it class III, with difficult 0.2654 kg/m3. from excellent quality an RQD 93%.The fractures spaced ES2. density low ID2.The intercepted network marked three families direction, major (N30–40E, N40–50E, N160–170E), secondary (N10–20E, N50–60E, N80–90E, N140–150E, N150–160E, N170–180E) minority (N00–10E, N20–30E, N70–80E, N100–110E, N110–120E, N120–130E, N130–140E). Finally, variation in intensity caused differences dips blasting planes, their strength, mesh.