First, the introduction
In China's mine heavy accidents, mine water inrush accidents have become more than mine gas accidents, resulting in economic losses have always been the first of various mine disasters. With the increase of mine mining depth, mine water inrush accidents remain high. In the past 20 years, more than 250 pairs of mines have been flooded with water, and the economic losses amounted to more than 35 billion yuan. At the same time, the mine water resources and environment also caused Huge destruction. The "Measurement and Verification System for Geophysical Exploration, Geochemical Exploration, and Drilling Verification" is clearly stated in the "Pipe for Water Prevention and Control in Mines". Establish a water quality analysis results account, underground hydrogeological exploration should use downhole geophysical exploration, drilling, monitoring, testing and other means. Establishing a rapid identification system for water inrush from mining areas and a water chemical analysis laboratory to quickly detect and identify possible water inrush sources such as water in the mine, dripping water, etc., is a very important basis for mine water prevention and control work.
The external inspection mechanism has a long inspection time and cannot effectively perform the effect of “research and follow-upâ€. The selected local testing organization lacks experience in coal mine water testing and the test indicators are not complete. No external chemical detection mechanism can give the type of water chemistry and identify the source of water inrush. However, the existing water source rapid identification instrument has a short test time, but the accuracy is not very high, and the quality of the data is closely related to the quality of the operator, and the quality of the data cannot be well controlled. In addition, there is a problem with the amount of data in the water source database established by some water source identifier manufacturers. At present, the water chemistry laboratory hardware facilities that are gradually established are mainly water source identification devices, and large laboratory equipment is equipped with less. Therefore, the establishment of a professional laboratory for water chemistry in mining areas
With the water source identification instrument as the rapid detection equipment, the large laboratory equipment as the accurate detection equipment, and equipped with professional and technical personnel, the coal mine water inrush rapid identification system will be able to effectively provide professional water chemical services for coal mine water control.
Second, the technical principle
The water chemistry method is one of the main methods to study the groundwater quality of each aquifer. The water chemistry data is the most essential feature of groundwater and an important basis for judging the water source of mine water. By analyzing water chemistry data, it is possible to quickly and accurately identify groundwater recharge sources and runoff conditions, determine hydraulic linkages between aquifers, analyze outburst water sources, and predict water inrush danger zones.
Third, the mine rapid water source rapid identification system
Groundwater in the lithosphere continues to chemically react with rocks, exchanging chemical components while exchanging water with the atmosphere, hydrosphere, and biosphere. Groundwater contains various gases, ions, colloids, organic matter and microorganisms. There are significant differences in the water chemistry characteristics of different aquifers. According to the characteristics of groundwater chemistry of each aquifer, a water source database is established, and the mathematical model of water source identification is established by multivariate statistical method. After obtaining the water-like water chemical index, it is compared with the water source database to quickly identify the water source type.
In the process of recharge, runoff and excretion, mine water is likely to be mixed between different aquifers and is no longer a single source of water inrush. Based on the principle of conservation of water chemical ion composition, a variety of water sources are mixed to form mine water. The composition and content of the elements are constant, but a series of chemical reactions occur between the ions during the mixing process, such as HCO3- and CO32- Affected by pH, Ca2 and Mg2 may form a poorly soluble substance with CO32-. The solubility of K Na , Cl- and SO42- is relatively large, and the content before and after mixing is approximately constant, which can be used as a variable for the calculation of the mixing ratio. Using matrix analysis, the proportion of various water sources in a mixed mine can be calculated.
Fourth, infrastructure
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