Identification of mine water inrush source based on multiple heterogeneous fusion: a case study in Lilou Coal Mine, China

The occurrence of mine water damage in the process of coal mining and the unknown nature of sudden water source seriously threaten the safety production of coal mine. How to quickly and accurately identify the burst water source has become a hot research topic of mine water damage prevention and control. In order to explore the new identification method of mine water source, taking the working face of 1303 in Shandong Lilou Coal Mine as an example, the main purpose of this study is to accurately identify the source of a large amount of old empty water on the working surface of 1303, point out the direction for water dredging work, and ensure the safety production of coal mine. Fifty-six groups of main aquifer water samples were collected based on groundwater chemical theory and mathematical theory. The contents of water samples Na+, Mg2+, Ca2+, CO32−, HCO3−, SO42−, and Cl−; 7 conventional ions; hydrogen ion concentration (PH); total dissolved solids (TDS), electrical conductance (EC); Cu, Mo, Ba, Ni, Zn, As, and D; and 18O 2 isotopes were determined. The water source system is based on conventional hydrochemical characteristics, fuzzy comprehensive evaluation of trace elements, and isotope analysis. The results show that the conventional water chemical analysis shows that the water sample and the top water in the study area and trace element analysis show that the relative membership of the water sample and the top water is up to 67.25%; isotope analysis shows that the water sample has the same supply source and the ash water varies from other aquifers. Finally, it is determined that the old empty water on the working surface of 1303 of Lilou Coal Mine is mainly derived from the roof sandstone aquifer, which contains a small amount of three ash water and no Austrian ash water. The research results are consistent with the actual mining situation of the mine. The research results provide a new and accurate identification method for mine water source identification and provide a theoretical and technical basis for coal mine safety production.