Isotope-labeled method for measuring pressure bearing water quantity of water-intercepted bottom plate

Abstract

The invention discloses an isotope-labeled method for measuring the pressure bearing water quantity of a water-intercepted bottom plate. The method comprises the steps of firstly, performing fine detection on the hydrogeological condition of a coal working face bottom plate; then arranging a curtain intercepting tunnel in a coal seam during underground construction, arranging a curtain line at the curtain intercepting tunnel, and performing curtain grouting on grouting holes in sequence; cross-heading the working face up and down, drilling a downward inclined bore as a feeding hole in the coal seam at each interval, and drilling an observation hole between the adjacent feeding holes; and finally, calculating the pressure bearing water quantity of the bottom plate and the supply speed of a secondary water source on the pressure bearing water of the bottom plate. The method has an important guiding significance for drainage equipment selection and required cost during artificial drainage after the water source in a mine threatened by the pressure bearing water is intercepted, has the characteristics of high safety, good reliability, simplicity in construction, low cost and the like, and therefore has good technical promotion value.

Description

technical field [0001] The invention relates to a method for measuring the pressure-bearing water volume in underground coal mines, in particular to a method for measuring the pressure-bearing water volume of the floor after water blocking and source cut-off based on isotope labeling. Background technique [0002] With the continuous increase of coal mine mining depth, the mining conditions and geological conditions are becoming more and more complex. During the mining process of the working face, the problem of pressurized water is often encountered, which brings great difficulties to safe production and is prone to floor outbursts. water accident. [0003] At present, researchers in this field usually solve the above-mentioned problems by means of deep drainage and intensive drainage and mining under pressure. In the process of deep drainage and intensive drainage, the water under pressure on the floor is generally discharged after the water is blocked and the source is cu...

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Problems solved by technology

[0002] With the continuous increase of coal mine mining depth, the mining conditions and geological conditions are becoming more and more complex. During the mining process of the working face, the problem of pressurized water is often encountered, which brings great difficulties to safe production and is prone to floor outbursts. water accident

[0003] At present, researchers in this field usually solve the above-mentioned problems by means of deep drainage and intensive drainage and mining under pressure. In the process of deep drainage and intensive drainage, the water under pressure on the floor is generally discharged after the water is blocked and the source is cut off. In this way The displacement of confined water is reduced. However, when selecting drainage equipment, generally mines choose high-power drainage equipment, without considering the total amount of confined water and the replenishment speed, which will inevitably cause waste of equipment, and high-power equipment consumes electricity. also many

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