Coal seam step-by-step water injection precise control system and water injection method

Abstract

The invention provides a coal seam step-by-step water injection precise control system and a water injection method and relates to the technical field of coal seam water injection. The system comprises a flow sensor, a pressure sensor, an injection liquid viscosity and pH value sensor, a data monitoring substation and a connection circuit, and real-time transmission of data monitoring is achieved. The coal seam step-by-step water injection precise control system further comprises a high-pressure water pump, a water injection pipe, a check valve, a flow control valve and an electronic control switch, and accurate control over water injection pressure and flow is achieved. The system further comprises a real-time mixing water tank for liquid injection, a plurality of injection liquid modified medicine tanks, a pumping pump, an injection liquid agitator, a steady flow control valve and a water inlet/outlet pipeline, and real-time regulation of and control over the physical properties of the injection liquid are achieved. By the adoption of the structure, based on the mechanical parameter model required for different water injection stages, a controller controls the flow of each component, and the flows are input into the PCL controller in the programming language, so that the real-time monitoring of and control over the step-by-step water injection pressure and flow are achieved, the modified injection liquid required in each stage is optimized, and the coal seam water injection disaster prevention effect is improved.

Description

Technical field [0001] The invention relates to the technical field of coal seam water injection, in particular to a coal seam stepwise water injection precision control system and a method for completing coal seam water injection by using the system. Background technique [0002] With the increase of coal mining depth, the in-situ stress, gas pressure and content of coal seams have increased significantly, leading to more severe prevention and control of coal and gas outbursts, dust, and rock burst disasters. Since coal seam water injection can reduce coal seam gas content and coal body stress, while increasing water content to inhibit coal dust generation, it has become a common comprehensive disaster prevention method. At the same time, on the basis of extensive and in-depth research on the coal seam water injection technology, equipment and water migration mechanism, the improvement of the existing coal seam water injection technology and technology has significantly improved...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the difficulties in real-time monitoring and control of water injection pressure and flow in different water injection stages, determine the modified pressure injection liquid required for water injection in each stage and control it in real time, and then improve the disaster prevention effect of coal seam water injection. The present invention provides A coal seam step-by-step water injection precision control system and water injection method, the specific technical scheme is as follows

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