花岗石的节理研究

A Study of Joints in Granite Materials

节理是岩石中的裂隙，广泛分布于花岗石中，影响石材的成材性能以及石加工品的美感和耐用性。查明节理不仅直接控制石材的块度、荒料率，而且为石材的风化变色作用提供良好的构造环境，促使花岗石风化变色作用的加深及其效果的扩大化。多种形式的节理网在花岗石抛光面上形成低反射率的暗线、暗斑、暗区，降低花岗石的平均光泽度，影响光泽度的均一性和石加工品的质量。因此，节理的研究是正确评价、合理开发石材资源、提高石加工品质量的重要环节。

Joints are distributed widely in granite materials and affect the sawn goods performance of the rock. The beautiful sensation and the wear of rock_processed products are influenced by joints. Through the study of joints of different sizes in granite mass, it is known that joints not only control lumpiness of granite materials but also provide a good structural environment for weathering of the rock, causing the continuous development of weathering and the deeping of decoloration. The joints compose multiple patterns, and hence from numerous dark lines and spots on the polished surfaces of the rock, which reduce the average polishing glossiness and uniformity. Therefore , the study of joints of different sizes is an important link in the evaluation and exploitation of rock material resources.