Study On The Hydrochemical Characteristics And Water Source Discrimination Method Of The Main Water-filled Aquifers In Yaoqiao Coalmine

In the process of coal mine production,the phenomenon of water inrush(gushing)in the working face is the most common way of water filling in aquifer around the mining space.The hydrochemical parameters of the main water filled aquifers are the most essential and basic characteristics,and also the important basis for distinguishing the source of mine water inrush.Based on the in-depth excavation and analysis of the geological,hydrogeological and hydrochemical data of Yaoqiao Mine,this paper studies the hydrochemical characteristics,genetic mechanism of the mine's main water-filled aquifers,and the method for quickly identifying the source of water inrush(gushing)in the mine.The main research results of the thesis are as follows:(1)The study revealed the main water filling methods of Yaoqiao Mine and the water chemical characteristics of the water-filled aquifers:Based on the analysis of mine water filling conditions,the main water filling sources,such as Quaternary bottom water,top and floor sandstone water,and floor L₄gray water,as well as their respective water filling modes and water filling intensity were determined.Through in-depth excavation and analysis of more than 130 water quality data and 5 groups of supplementary test water sample data accumulated over 40 years in Yaoqiao Mine,39groups of reliable data were screened out.The study revealed the water quality types,hydrochemical characteristics and spatial differences of the main water-filled aquifers in the mine area.(2)Based on the Gibbs model method and the ion proportion coefficient method,the hydrochemical mechanism of each main water-filled aquifer is clarified:According to the major ions in the main water-filled aquifers,the spatial distribution characteristics and main sources of the major ions in groundwater are expounded.Combined with the regional difference characteristics of hydrogeological conditions and karst development rules in the mining area,the correlation between the water chemical composition of limestone aquifer and its karst development is explored.The basic mechanism and process of the formation of major ions in the main water-filled aquifers,as well as the internal relationship between specific hydrogeological conditions and the chemical characteristics of groundwater are revealed.(3)The construction method of the major characteristic ion library of each main water-filled aquifer and the rapid identification method of water source of inrush(gushing)are put forward:Cluster analysis was used to determine the water quality characteristics,the concentration range of major ions and the boundary threshold of the main water-filled aquifers in the study area,and the major characteristic ion libraries of the main water-filled aquifers were established.Based on the variability analysis of major ions,K⁺+Na⁺,Ca²⁺,Mg²⁺and HCO₃^-with obvious differences among aquifers are selected as characteristic ions for identification.Combined with the fuzzy mathematical method,the method of water source identification and source proportion composition calculation of water inburst(inburst)in Yaoqiao Mine is proposed.This paper reveals the hydrochemical characteristics and genesis mechanism of the main water-filled aquifer in the mine,and on this basis,innovates the construction method of the ion library of the main water-filled aquifer in the mine,as well as the method of rapid identification of the source of the water inrush(gushing)and calculation of the proportion of the source composition.The research results of this paper can lay a foundation for the accurate and convenient rapid identification of the source of mine water inrush(gushing),and also provide a decision-making basis for the rapid rescue and relief of mine water inrush accidents.There are 29 figures,17 tables and 81 references in this paper.