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

自然不连续性以及机械性能是难以控制的参数，这些参数会显着影响爆破后大理石的碎裂。在中非，Bidzar 采石场是唯一一个生产大理石的采石场，几十年来一直受到块体破碎问题的困扰，需要多次爆破，造成巨大成本和环境问题。本研究的目的是预测 Bidzar 采石场的破碎情况，并使用 Kuz-Ram 方法提高其地质和机械知识。因此，研究了作为不连续面倾角的函数的爆破性以及作为粉末因子、抗压强度和钻孔网的函数的碎裂。所得结果表明，采石场具有非均质性，主要由中等硬度的裂隙大理岩组成。³ . 来自 Bidzar 采石场的大理石品质优良，RQD 为 93%。裂缝和不连续面间隔开，等级为 ES2。裂缝和不连续面的密度较低，属于 ID2 级。采石场被一个由三个方向族标记的不连续面网络拦截，主要（N30-40E，N40-50E，N160-170E），次要（ N10–20E、N50–60E、N80–90E、N140–150E、N150–160E、N170–180E）和少数族裔（N00–10E、N20–30E、N40–50E、N70–80E、N100–110E100–110E） 、N120–130E、N130–140E）。最后，爆破强度的变化是由爆破面倾角、抗压强度和钻孔网格变化的差异引起的。