A method for cooperatively weakening high- and low-level hard roofs based on non-continuous fracturing

AU2026205240B1Pending Publication Date: 2026-08-20ANHUI UNIV OF SCI & TECH
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Patent Information

Application Number
AU2026205240
Authority / Receiving Office
AU · AU
Patent Type
Applications
Current Assignee / Owner
Priority Date
2025-09-29
Filing Date
2026-01-29
Publication Date
2026-08-20

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Abstract

Provided is a collaborative weakening method of high and low positions for hard rock layer roof based on discontinuous fracturing, which includes obtaining rock stratum parameters of a benchmark area and rock stratum parameters of a current area; dividing a roadway into multiple independent sections based on the rock stratum parameters of the benchmark area and rock stratum parameters of the current area; drilling several sets of fracturing boreholes in each independent section, each set of fracturing boreholes consisting of a high-position deep hole and a low-position shallow hole; arranging the high-position deep hole and low-position shallow hole alternately along a tunnel axis according to the weakened unit length and rock bridge unit length; when detonating the fracturing boreholes, a detonation time of the high- position deep hole is delayed compared to a detonation time of the low-position shallow hole. ABSTRACTABSTRACTABSTRACT
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Citation Information

Patent Citations

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