Coal mine high-energy laser cutting and thermal shock synergistic pressure relief and permeability enhancement method

CN122148316APending Publication Date: 2026-06-05CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING UNIV
Filing Date
2026-02-03
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing downhole laser drilling equipment mostly adopts an open-loop control mode with fixed process parameters, which makes it difficult to detect lithological changes and fracturing effects in real time. This results in insufficient fracturing of hard rock layers or excessive melting of soft rock layers, leading to low rock breaking efficiency, high energy consumption, and poor process adaptability.

Method used

By collecting data on methane concentration, ambient temperature, and the position coordinates of the work terminal within the borehole, environmental condition monitoring data is generated. The geological mapping algorithm is used to predict lithology, and combined with multidimensional physical response signal analysis, the laser output power, spot movement speed, and gas supply pressure are adjusted in real time to achieve adaptive control.

Benefits of technology

It enables rapid response to changes in rock hardness and material properties, improves the stability and efficiency of non-contact fracturing operations, avoids the problem of decreased rock breaking efficiency and slag blockage caused by sudden changes in geological conditions, and ensures energy coupling efficiency.

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Abstract

The present application relates to the technical fields of mining engineering and laser application, and particularly relates to a coal mine high-energy laser cutting and thermal shock synergistic pressure relief and permeability enhancement method, comprising the following steps: S1, collecting the methane concentration value, the environmental temperature value and the pose coordinate value of the operation terminal in the drill hole, digitally encoding and clock synchronously marking the collected analog signals, and generating the environmental state monitoring data. In the present application, by comparing the physical feedback characteristics of the rock after excitation with the preset ideal cracking state, the core operation parameters such as laser output energy and scanning speed are automatically corrected by using the deviation calculation, the adaptive and rapid response of the operation process to the hardness and material changes of the rock stratum is realized, the problem of rock breaking efficiency reduction or slag blockage caused by sudden change of geological conditions is effectively solved, and the stability and efficiency of the non-contact cracking operation in the complex environment are significantly improved.
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