Study On Calculation Method Of Development Height Of Water Induced Fracture Zone Based On Water Inflow And Quality

There are some difficulties in the calculation and measurement of the height of the water flowing fractured zone,which is a serious threat to the roof water in GaoJiabao mine.Based on the analysis of water inflow and water quality,this paper studies the development height of the water flowing fractured zone and the ratio of crack to production,which has certain guiding significance.In this paper,based on the geological and hydrogeological conditions of the 101 working face,the borehole data in and around the working face are analyzed.Analysis of the five stage between water and the water level change of the concept of long-term observation well,and water inrush of water quality in the course of change,and mining height,results that: the first stage is the direct roof of Yanan group aquifer water filling;the second stage of the water flowing fractured zone has to communicate with Luohe third,fourth,fifth layers;the water flowing fractured zone has entered the stage of Luohe formation in the upper aquifer,the various stages of the mining height,volume,long-term observation well drawdown and other basic parameters.Generalized hydrogeological conditions of the 101 work,the use of non complete wells were calculated in each stage of the water flowing fractured zone height,through water quality analysis method to modify the calculation results,second,three or four,five stage by height of water flowing fractured zone were 96.1m,209.3m,230.3m,247.6m;built in 101 working face of hydrogeological model the inversion of the relevant parameters,the first and the second stage height was calculated,the result is 99.9m,109.9m.Analysis of the 101 working face of roof rock,respectively,China University of Mining and Technology(Beijing),Tangshan Coal Science Research Institute,Binchang mine analogy method,UDEC numerical simulation method to calculate the different mining height of water flowing fractured zone.A comparative analysis of the calculation results of the error,to determine the final value,the result is: the mining height is 3.5m,height of water flowing fractured zone is 96.1m;the mining height is 7.6m,height is 200.1m;the mining height is 8.75 m,height is 230.4m;the mining height is 9.35 m,height is 247.6m;Split ratio is 26.5 ~ 27.2.