FRACTURE MECHANICS STUDY OF CLUSTERED LODES IN LARGE SCALE VEINED DEPOSITS

摘要

A series of important results of studies on individual lodes and clustered lodes have been gained by using the theories and methods of fracture mechanics as follows: the factors and development-processes controlling clustered lodes are investigated according to the conditions of crack extension force, marginal condition plays an important role in determination of the dimension of large-scale clustered lodes, analysis of regional stress field is the fundamental method in prognosticating the emplacement of ore-deposits, the complication of stress field in clustered lodes leads to the formation of variable shapes of lodes, the regulations of development of wallrock alteration in lodes are also the results of effects upon the propagation processes of lodes by the anomalous stress field of fracture, the investigation on fracture mechanics of veined deposits raises the quantitaive analysis of lode-structures to a higher level.