本文深入探讨了岩石破碎过程的复杂性，包括材料的抗压强度、硬度、韧性、形状、大小、湿度、密度、均质性以及外部条件等因素如何影响破碎比。通过观察不同力的作用方式（垂直力导致的断裂、剪切应力导致的滑动或两者结合），解释了岩石在特定条件下的破碎过程。同时，介绍了破碎过程中材料的弹性变形、硬化和塑性变形阶段，并强调了岩石和矿物材料的明显屈服点。
Crushing refers to the process of reducing rock into smaller chunks. Rock crushing is a very complex process, as in the process of crushing, a number of factors will influence the crushing ratio. The main factors are: material resistance strength, hardness, toughness, shape, size, humidity, density, homogeneity, and external conditions, such as the instantaneous interaction and distribution of materials at the moment of crushing. All these factors make the process of breaking complicated, and so far a unified and complete set of mathematical theory is not achieved to explain the crushing ratio.
Crushing process does not happen by itself and it is not reversible. The external force must overcome the internal cohesion between particles in the rock. The cohesion, even for the same rock, differentiates greatly. It depends not only on the nature and structure of crystals in the rock, but also on the deficiencies of the crystals. These deficiencies may be macro-or micro-cracks. Due to the presence of cracks in the crystal, the connection between crystals becomes weak.
We can see from the mechanics of materials, materials subject to external force, in the event of damage, first produce elastic deformation, when material was not damaged. When the deformation reaches a certain value, the material hardening, the stress increases, and thus deformation to continue. When the stress reached when the elastic limit, permanent deformation began to emerge, materials into the plastic deformation state. When the plastic deformation reached its limit, the material damage could arise. Of course, rock and mineral materials, the yield point is obvious.
It can be detected from observing cross-section that the rock is crushed by pressing fracture (or tension fracture) due vertical forces outside; or slip due to shear stress; or both. For example, exert pressure to brittle materials from above until it reaches the limits of the specimens’ compression. The materials is only destroyed along the vertical at the moment; if you continue to exert pressure on the materials, the specimen will be fractured, that is, crushing.
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