Interpretation Of Engineering Geological Information For Logging Parameters Of Coal Measures Strata In Exploration Stage

For a long time,coal has always been the main energy supply in China.As the shallow resources are exhausted,the vast majority of domestic coal mine have started to conduct deep mining.And deep mining face the challenges such as high geostress,high roadway deformation and so on.So the ananlysis and evaluation of the engineering geological condition in deep coal stratum has important pracitical significance for the deep mining of coal.Compared with the conventional information acquisition method of engineering geological condition in deep coal stratum,coalfield geophysical logging method has the advantages of being simple to operate,its low cost and carrying a large amount of information.So,it is not only of theoretical significance,but also of great application value to carry out the interpretation of engineering geological information for logging data.In this paper,through the drilling design and construction,logging data collection and rock physical mechanics tests in deep part exploration area of Panji mining area,it was obtained that the drilling logging data and geological information of coal stratum which almost covered the whole study area.Then it was established that the lithology logging identification model of the coal stratum in the study area,the logging prediction model of rock physical property parameters such as density,porosity and so on,the logging calculation model of rock strength parameters such as uniaxial compressive strength and tensile strength and the logging prediction model of rock elastic parameter such as elastic modulus and Poisson's ratio by means of mathematical statistics.And the validation analysis showed that the model has high prediction accuracy.And mechanical parameters of the drilli roles which have not been tested in rock mechanics parameters was calculated,according to the logging prediction model of rock mechanical property parameters.Finally,the profile of rock mechanical parameters of the coal stratum in the study area and the contour map of the compressive strength and elastic modulus of No.13-1 coal seam were drawn.The results showed that the logging calculation model established in this paper could be used to predict the engineering geologic information.