Water Inflow Prediction And Stability Study Of Chaokewula Mining Area

The temporal and spatial distribution of groundwater resources in the Chaokwula mining area is extremely uneven,which makes the region face two major problems of engineering water shortage and resource water shortage.In the process of coal mining,it is easy to cause the shortage of industrial and agricultural water and domestic water in the surrounding areas of the mining area.At the same time,due to the influence of mine drainage and domestic water,it is easy to produce many adverse environmental geological problems around the mining area.Therefore,it is necessary to carry out the relevant water inflow prediction and stability research in the normal and safe mining of the Chaokura mining area,so as to provide certain theoretical support for ensuring the sustainable development of the economy in the region,and also provide certain technical support for the coal mining work in the region.On the basis of detailed analysis of the collected data,this study refers to the detailed geological reports,pumping test results and the investigation and analysis results carried out in the mining area,depicts the hydrogeological conceptual model that is suitable for the actual situation,establishes the groundwater flow model that meets the hydrogeological conditions in this area,and uses the numerical simulation method to simulate the water inflow under three supply conditions in Chaokewula mining area according to the mining plan.The stability analysis of the water inflow in Chaokewula mining area is carried out,which provides reference for the comprehensive analysis of mine water.The main conclusions are as follows:（1）Under the condition of only coal seam mining,it can be concluded from the water level map:water level change of coal seam around working face;when the coal seam is mined through the k₁b² aquifer,the aquifer in the middle of the mining area in 19 years is close to a dry state;when the mining coal seam passes through the k₁b³ strong aquifer,the groundwater level continues to decline and the groundwater level drawdown funnel continues to expand.（2）The simulation results show that:in the case of 2 coal seam mining,the results show that the predicted water inflow is small in the mining process of each working face,and the water inflow decreases from a straight line to a gradual stable state within half a year of mining;in the case of k₁b² aquifer,water inflow generally shows a downward trend;in the case of k₁b³ strong aquifer,the overall water inflow has a downward trend,but the downward trend is slower than that of K₁b² aquifer,explanation of considerable water inflow in k₁b³ aquifer.（3）According to the total water consumption in Chaokewula mining area,the mine water inflow of the most unfavorable water supply K₁b³ aquifer predicted by numerical simulation method is superimposed on the water inflow of K₁b² aquifer and the recharge of the first mining area.The minimum water supply can reach 986.21 m³/h,which is greater than the maximum water demand of the mine 607 m³/h.Under this condition,the water supply fully meets the daily maximum water consumption of the coal mine,the analysis results provide analysis guarantee for the analysis and utilization of mine water in mining areas.Figure 53 table 7 reference 82...