Development Characteristics Of Geological Structure And Quantitative Evaluation Of Complex Degree In Qian Ying Zi Coal Mine

Geological structure is the main geological factors that affect mine safety production, it directly restricts the production plan arrangement and the choice of the ways of mining. Qian Ying Zi coal mine is a new mine, geological structure is complicated and development law is unclear, bring production management adverse effects to ensure coal mine safety production, making a thorough study on mine geology structure rule, mechanism analysis of geological tectonic formation and zoning evaluate of complicated degree, become an urgent task.By analyzing and arranging Qian Ying Zi coal mine's mining data, taking F22 and F17 fault for boundary all mine from west to east is divided into three regions, and study tectonic development rules based on this, obtained that mine development fault types are normal faults, reverse faults and hinge faults, normal faults are the main, accounting for 65%, reverse fault relatively developed,fault size uses small middle fault age that gap less than 20m as main faults; normal faults cut reverse faults in coal mine, fault combination such as development horst, graben, stepladder and imbricate, fault development is controlled step by step; quantitative analysis of fault development by using fault density, fault strength and fractal dimension, fault density and fractal dimension is larger in the first and third area, the second area is smaller.Analysis the character of fold structure exhibition, elicit that the main fold is width sustained syncline that lifted from south east. West of F25 fault developed EW direction fold structure, east of F25 fault developed NE direction fold structure the two is separated by F25 reverse fault. Quantitative analysis of fold deformation by using fold plane deformation coefficient, elicit that plane deformation coefficients high values are located in fold axis and its surrounding area.Analysis and research of Qian Ying Zi coal mine's structure formation times, and according to the mine geology tectonic form and combination rule analysis of ancient tectonic stress field, elicit that structural lattice frame is the results of indo-Chinese epoch and Yanshan early, late Yanshan period of tectonic movement and XiShan late forming, early Himalayan tectonic movement is little affected to mine tectonic. Interpretation of the 32 structure coal seam by using logging curve combined with observed macroscopic characteristics of underground coal structure, analysis tectonic coal distribution characteristics, elicit that the third area's tectonic coal development is the strongest, in general the thickness is more than 0.3m, the first area takes second place, tectonic coal development of the second area is relatively weak, tectonic coal development strength and fracture fractal dimension and the plane deformation coefficient presents positive correlation.Select fault density, fault strength and fracture fractal dimension, plane deformation coefficient and tectonic coal thickness five evaluation indexes, by using the grey fuzzy comprehensive evaluation method to quantitative evaluate Qian Ying Zi coal mine's tectonic complexity,make mine tectonic complexity comprehensive zoning maps, elicit that the entire study area take relatively simple structure and relatively complex structure as main, simple structure area and complex structure area take up a smaller proportion, show sporadic distribution trend, consistent with the production of exposed, provides geological basis for coal mining engineering design.