Study On The Formation Of The Separation Layer And The Mechanism Of Water Inrush In Wang Lou Coal Mine

Coal is the main energy source of our country,and it is also the most economical choice.However,with the exploitation of underground coal resources,the mine water disaster has become a major safety problem in the production of coal enterprises in China.Among them,as a new type of water damage,the water inrush is not obvious,the sudden water inrush is large and the damage is serious,which has gradually aroused people's attention.At present,people's research results are mainly concentrated on the formation mechanism and distribution law of the separation layer,and there are few studies on the formation conditions of the separation water and the mechanism of water inrush.Therefore,the research on the mechanism of water inrush from separated layer is very important for the safe and efficient exploitation of coal resources in the future.Shandong energy Lineng group Wang Lou coal mine is the main coal mine of the Shanxi group 3 coal seam,the mine has occurred several working face inrush accidents,which have a certain impact on the safety of the mine production.This paper,starting with the geological and hydrogeological conditions of the mine,collects the characteristics of the main water filled aquifers in the 3 coal beds,including the lithologic characteristics of the overlying strata,the pumping experiment and the hydrological observation data and so on,and analyzes the influence of the coal seam mining on the 3 coal seam.Based on the analysis method of key stratum theory,the law of overburden movement and failure caused by mining of 3 upper coal seam is studied,and the location of abscission layer space is obtained.Based on the geological conditions of 3 coal seams,the computer numerical model is established by using the UDEC(discrete element)numerical simulation software to simulate the overlying movement of coal seam in the actual mining process.By analyzing the characteristics of water inrush and water inrush of the working face,and the development height of the water fissure zone in the coal seam mining process,the development position and the supply source of the water can be determined.Based on the above analysis,the mechanism of water inrush from overlying strata in 3 upper coal seam of Wang Lou coal mine is analyzed.It is hoped that it can play a positive role in the safety and efficient production of coal mine in the future.At the same time,it is hoped that it can be used for reference and reference value for coal mining in the next coal mine.