The Quantltative Evaluation And Prediciton Of Geoloplical Structure In Dong Jizhe Mine

It is mainly analyzed that Dong Jiahe Minefield development features of geologicalstructure, which includes the distribution and combination features of folds and faults, thedevelopment laws of mine geological structure is summarized and the tectonic stress field isanalyzed on the basis of analyzing and summarizing Cheng He mining area geologicalstructure development characteristics and laws in the paper. By using fuzzy comprehensiveevaluation method, five quantitative evaluation index are selected to evaluate Dong JiaheMinefield mining area structural complexity degree, Gray System Modeling is applied topredict evaluation index values of non-mining area and the structural complexity degree ofnon-mining is evaluated quantitatively. The following main results has been made in thepaper:(1) The structures of folds and faults are all development in Dong Jiahe Minefield, butfolds are more development. The majority of folds are closed short axis anticline and syncline,the main direction for the NE and NW, to the main syncline. The most of revealed faults dropheight are less than 5m normal faults in the minefield, and only develops a few things NEEand EW reverse faults, small faults with the distribution features of dense belts and densityand white. The faults are four directions, mainly EW and SN, NW and NE followed. Theplane combination form of faults are the main parallel form, followed by cross-portfolio andirregular form, the combination in profile form with graben,horst,ladder form, andinterlayer-gliding structures development.(2) By comparing, the fault density, fault strength index, the fault to affect the index, flatfold intensity index, construction area of loss coefficient of five quantitative evaluation indexare selected to use the fuzzy comprehensive evaluation, By evaluating quantitatively thestructural complexity degree of mining area in Dong Jiahe Minefield which has been divided into 156 units, The results are: 81 units of classâ… , 35 units of classâ…¡, 13 units of classâ…¢and27 units of classâ…£.Evaluation results are consistent with the actual exposed exploitationsituation. On this basis, the Gray System Model is used to forecast the index value ofnon-mining area and the structural complexity of non-mining area is evaluated quantitativelywhich has been divided into 31 units. The results are: 17 units of classâ… , 10 units of classâ…¡,4 units of classâ…¢. The main tectonic scale are classâ… andâ…¡in non-mining area, the classâ…¢are only distributed in minefield western, classâ…£are not appear, so mine non-mining areawith a whole lower structural complexity degree, it is show that non-mining area is moreappropriate for comprehensive mechanical mining.