High-pressure hydraulic fracturing coal seam water injection system and automatic water injection monitoring method

Abstract

The invention relates to a high-pressure hydraulic fracturing coal seam water injection system and an automatic water injection monitoring method, belonging to the field of technical equipment. The high-pressure hydraulic fracturing coal seam water injection system is characterized by comprising a plurality of water injection units (3) used for injecting water into a coal seam (22); an inlet and an outlet of a pressure pump (6) are respectively connected with a static pressure water injection pipeline (4) and a dynamic pressure water injection pipeline (5); the static pressure water injection pipeline (4) and the dynamic pressure water injection pipeline (5) are simultaneously connected with a pipeline part of the water injection units (3); the pressure pump (6) is connected with a control cabinet (9) and is controlled by the control cabinet (9); circuit parts of the water injection units (3) are simultaneously connected with the control cabinet (9). According to the high-pressure hydraulic fracturing coal seam water injection system and the automatic water injection monitoring method, a coal seam water injection way combining dynamic pressure and static pressure is realized by arranging the static pressure water injection pipeline and the dynamic pressure water injection pipeline, so that water injection pressure and water injection amount are accurately controlled, and the water injection effect is greatly improved.

Description

technical field [0001] A high-pressure hydraulic fracturing coal seam water injection system and a water injection automatic monitoring method belong to the field of technical equipment. Background technique [0002] Coal seam water injection is the pre-construction of water injection drilling in the coal seam before mining, and the pressure aqueous solution is injected into the coal seam to increase the water content of the coal body, thereby changing its physical and mechanical properties, so as to prevent coal seam disasters and accidents. Coal seam water injection can not only reduce coal dust, but also fundamentally prevent coal and gas outburst, rock burst and other disasters. Most domestic anti-rockburst coal mine anti-scour projects mainly include blasting pressure relief, coal seam water injection pressure relief, and large-diameter drilling pressure relief projects, among which coal seam water injection pressure relief projects can reduce coal seam stress concentra...

AI Technical Summary

Problems solved by technology

However, the existing coal seam water injection equipment and methods usually take a long time, occupy a lot of labor, and are difficult to manage, and the water injection pressure and water injection volume cannot be accurately controlled.

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