Well-ground combined fracturing three-dimensional gas extraction management method based on TBM rapid excavation

Abstract

This invention relates to the field of coal mine gas extraction and control technology, specifically to a three-dimensional gas extraction and control method based on TBM rapid tunneling and combined shaft-ground fracturing. The method includes the following steps: S1: Using a full-face hard rock TBM with a set diameter, rapidly tunneling the bottom extraction roadway to achieve a set monthly progress that allows for time and space gains for gas control; S2: Developing a high-pressure hydraulic fracturing implementation plan and a gas control and extraction plan based on the roadway's geological conditions; S3: Conducting finite boundary simulation and analysis, and formulating fracturing safety control measures; S4: According to the fracturing implementation plan, using a directional drilling rig to construct cross-layer boreholes with a set diameter in the bottom extraction roadway, controlling the borehole depth within the set depth, placing fracturing pipes inside the boreholes, and simultaneously sealing the boreholes using a three-plug, two-injection method. This invention improves and upgrades existing gas control methods, effectively solving the technical problems existing in the prior art.

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