RECOGNITION OF COAL TYPES AND LITHOLOGICAL CHARACTERS BY FUZZY MULTILAYER COMPREHENSIVE EVALUTION

Having briefly described the mathematic method of fuzzy multilayer comprchensive evalution, the paper discusses emphatically how to recognize the coal types and lithological characters on coal borehole profiles by using this method.The main content in the paper can be divided to the following parts: a.to bulid the first evalution matrix and weigh matrix adopting the frequency statistical analysis; b.to constitute the secord evalution matrix taking the subordinats function with the normal distribution; c.to obstain the evalution results if using fit operators; d.to test this method with a processing example.