The Experimental Study On Floor Fissure Expansion And Water-inrush Through Fault Under The Influence Of Mining

The disaster of water inrush in coal mine is seriously affecting the safety of coal mining and workers.The faults such as geological structure is main form of coal mine water inrush accidents.The redistribution of stress field in the process of mining of coal seam cause fault activation.The fault activation of crack and bottom water expands gradually under the mine pressure and water pressure and then they connect into water inrush channel under the common effect.Besides which is the important reason for the mine water inrush accident.This article is aim at the influence of floor and fault in the process of mining by the method of the theoretical analysis,similar material simulation experiment,the research methods for mining such as type of rock material test fault activation and water inrush channel formation process has carried on the basis of experimental research.In this paper,on the basis of the theory of rock mechanics,analyzes the change and the distribution of stress field in the process of mining theory and analyses the influence of the change of stress field of fault activation of important role in promoting,reveals the fault activation mechanism of crack extension;At the same time through the type of rock material under uniaxial compression experiment to study the different fault types and fault Angle such as the influence of several factors on the crack extension,it is concluded that the different fault types of fault point,the dangers of working face advancing distance inrush cases happen,in this paper,based on the real fan area coal mine geological conditions,made a similar simulation model of mining is studied through similar simulation experiment under the influence of fault activation water inrush and the crack extension space-time evolution process,through the above experimental research,found that with the decrease of the Angle of fault,fault direction working face,mining under the influence of fault activation leads to inrush risk increase gradually,also found that top coal floor with faults linear distance recent regional water inrush accidents are most likely to form water inrush channel.