Basic problems of the theory of coal destruction by water jet
Abstract
The study of the process of coal destruction by water jet in order to build a rational theory of the phenomenon is a difficult theoretical and experimental task. The complexity of the study is caused by insufficiently studied process of brittle fracture, the complexity of the structure of the fractured rock, the lack of our information about the destructive agent and its action. In such a complex' environment, it seems natural at the first steps of the research to refuse from full consideration of all factors acting in the process of fracture, to simplify and schematize the phenomenon. The study carried out in a simplified scheme gives only approximate dependences between the mechanical characteristics of the rock being fractured and the parameters characterizing the jet producing the fracture. However, the obtained dependencies, having been subjected to experimental verification, can be evaluated with respect to the accuracy of the results they deliver and the acceptability of their use in the practice of technical calculation. On the basis of experience, corrections can be made to them, taking into account the complexity of the actual phenomenon and bringing the simplified scheme closer to reality.
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