Characteristics of faults in the Liangzhuang mining area and their control on karst development in Ordovician limestones

Abstract

On the basis of the analysis of fault distribution characteristics in the Liangzhuang minefield, the site, channel, site distribution, and probability of karst water inrush from the Ordovician limestone affected by fault type, fault drop and fault dip is expounded. First, authors introduce methods of fault influencing factors and fault fractal dimension by synthesizing these faultage elements mentioned above. Next, the quantitative study of fault development characteristics in the Liangzhuang minefield is carried out using nonlinear theory, which reveals the intrinsic relationship between fault and karst fissure developing in the Ordovician limestone. Ultimately, through a combination of microslice identification and macrogeophysical analysis, the horizontal and vertical distribution regularities of Ordovician limestone karst fissures in the Liangzhuang minefield are studied, that is, the horizontal distribution shows discontinuity, and the vertical distribution shows relative continuity from the top interface of Ordovician limestone down the depth from 10 m to 40 m. This research can play an important guiding role in predicting water inrush from the Ordovician limestone karst during mining deep coal seam.