Water level monitoring device and water level monitoring method

Abstract

The invention discloses a water level monitoring method used for monitoring a water level of an underground well. The water level monitoring method comprises the following steps: sequentially placing three pressure sensors on different depths of a liquid medium in the underground well at fixed intervals so as to measure the pressures of different depths of the liquid medium; and calculating the depth of each pressure sensor according to the pressure value measured by each pressure sensor, and calculating the water level in the underground well according to the depth of each pressure sensor. The invention also discloses a water level monitoring device used for monitoring the water level of the underground well.

Description

technical field [0001] The invention relates to a water level monitoring device and a water level monitoring method thereof, in particular to a water level monitoring device and a water level monitoring method used in underground coal gasification industry. Background technique [0002] Underground coal gasification is a process in which underground coal is directly burned in a controlled manner to produce combustible gas. Since underground coal gasification is carried out in an open underground hydrological environment, during the process of underground coal gasification, it is necessary to keep abreast of the situation of groundwater around the gasification area, especially the change of groundwater level, in order to understand from one side The progress of gasification. For example, the drop of water level around the gasification area may mean that the gasification area is flooded; in addition, in the process of underground coal gasification, it is necessary to set up p...

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Problems solved by technology

This method poses a threat to the safety of surveyors, wastes wires, and the error between the measured water level and the actual water level is relatively large, and it cannot be operated at high temperatures

[0004] In addition, known methods of measuring water level using pressure transducers placed in the water do not take into account the inhomogeneity of groundwater density distribution

In the underground coal gasification industry, due to the influence of gasification, the water quality around the gasification area is turbid, the composition of the water layer is complex, and the density distribution is extremely uneven. Therefore, there is a large error in the water level calculated based on the standard water density and pressure.

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