Reasonable Retention of Waterproof Coal Pillars under Influence of Faults
Taking 22601 working face of Changchunxing Coal Mine,the goaf water accumulation area of 5214 working face of Wujiagou Coal Mine,and the WF19 fault as the research objects,combined with geological and hydrogeological data of the study area,the safety of the size of the waterproof coal pillars left between adjacent working faces was studied.Firstly,the connection between the 22601 working face and the WF19 normal fault,as well as the goaf of the 5214 working face was analyzed,and the water source and conduit of the fault were studied.By theoretical calculation and numerical simulation methods,the width of the protective coal pillar for faults was calculated.The theoretical calculation results of the two methods were compared,and combined with the actual situation,the width of the protective coal pillar for the working face was preliminarily determined.Based on the principle of safe mining in mines,combined with factors such as the actual width of the protective coal pillar in the working face,initial mining and initial pressure in the working face,and water rich areas in the fault,a safety evaluation of the width of the protective coal pillar in the 22601 working face was conducted,and suggestions were made for the prevention and control of water hazards in the fault.
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