Analysis And Research Of Water Disaster Prevention For61101 Place In Tangjiahui

Coal is one of the most important energy sources in China's modern economic construction,occupying an important position in China's economic construction.Coal mine water damage has always been one of the important reasons for threatening coal mine safety production,and the water pollution caused by coal mining water pollution accounted for more than half of the mine water damage.The main mining face of Tangjiahui coal mine is 6 coal,61101 working face is the first working face of the mine,and the mining face is faced with the safety problem of the roof sandstone water,the floor of the Austrian gray water,the fault fissure water and the abandoned roadway.The technology of water damage analysis is not perfect.Therefore,it is necessary to study and analyze the water analysis and safety evaluation of the 61101 working face of Tangjiahui.In this paper,61101 working face of Tangjiahui coal mine is used as the engineering background of water pollution prevention and control,and the method of harnessing and controlling water damage of coal mining floor is analyzed and the safety evaluation is made.The research results are as follows:1.Through the 61101 working face of hydrogeological conditions of exploration,as well as drilling data analysis,and carried out geophysical and drilling exploration method design,made a further analysis.This gives us a deep understanding of the water-rich features of the Ordovician aquifer,the water barrier capacity,the thickness and the fissure of the bottom plate,and the structural development of the working surface.2.Based on the engineering background of DF11 fault in Tangjiahui coal mine,this paper constructs the engineering geological model and studies the hydrodynamic coupling of seepage risk.(5m,10 m,15m,and 20m)and different propulsion distances(30m,90 m,120m,150 m,210m)were analyzed by simulation software FLAC3 D for influencing factors such as DF11 different tipping faults and different fracture zone faults,The characteristics of overburden stress change,the law of overburden failure and the activation and seepage characteristics of fault.The simulation software FLAC3 D provides the numerical simulation basis for the mining of 61101 workingface in Tangjiahui coal mine,and also has the guiding significance for the mining and construction of the mine.The simulation results show that:(1)As the distance between the working face and the fault is getting closer,the shear stress and the vertical stress of the overburden are gradually increased,but the water pressure of the aquifer is constant.(2)With the increase of the dip angle,the vertical stress in the overburden is getting bigger and bigger,and the shear stress of the overburden is getting smaller and smaller with the increase of the dip angle.The normal stress increases with the advance of the working face,and increases with the increase of the dip angle.The vertical displacement of the fault interface increases with the increase of the dip angle,and when the distance is constant The slippage of the interface at the same elevation is larger than that of the lower interface.When the distance is the same,the plastic damage range of the coal pillar and the bottom plate decreases with the decrease of the dip angle of the fault.Large,it can be concluded that under other conditions,the pressure in the pores of the coal pillar and the bottom plate increases with the inclination of the fault.When the distance is constant,the working surface is advanced to the fault,the groundwater flow The flow rate will gradually increase,that is to say,the width of the coal pillar is increased with the increase of the risk of water seepage.(3)In the case of constant distance,the shear stress in the overburden and the vertical stress in the overburden and the normal stress in the fault are increased as the width of the fracture zone increases.The amount of slip by the broken width of the role of the larger,with the greater.The sliding range of the upper disk interface is larger than that of the lower plate interface,and the influence range and extent will increase.It can be concluded that the pressure in the pillar and the bottom plate of the overburden are in the same condition The inclination of the fault increases and increases,and when the distance is constant,the working surface is pushed to the fault,and the flow rate of the groundwater flow will gradually increase,that is,the width of the coal pillar is increased with the increase of the risk of seepage big.3.Based on the empirical analysis of the influencing factors of safety and recovery of 61101 working face,the empirical formula and the water inrush coefficient formula are used to analyze the risk of sandstone water and floor ash Preliminary evaluation,the results are as follows:(1)The height of Hf is 227 m,so 4 coal roof sandstone and 6 coal roof sandstoneaquifer is the first surface of the roof water-filled aquifer;(2)The water inrush coefficient Ts is 0.0263 ~ 0.0318 MPa / m,which is less than the critical water inrush coefficient of 0.06 MPa / m.Therefore,the possibility of water inrush is very small.4.This article on the face of water,mine water and combined with the surrounding mine prevention and control of water experience,to prevent water pollution prevention and control provides a method and countermeasures.This paper analyzes and evaluates the water safety evaluation of 61101 working face in Tangjiahui Mine,and provides reference and experience for realizing mine safety production.