2024
DOI: 10.3389/feart.2024.1367933
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Principle and practice of hydraulic softening top-cutting and pressure relief technology in weakly cemented strata

Tao Wang,
Guoyao Xu,
Liyuan Liu
et al.

Abstract: Extremely thick and hard roofs are difficult to break in the mining of a working face, and the large area of the suspended roof easily induces a strong ground pressure or dynamic impact disasters. The roof control of a coal mining face in a mine in western China was taken as a case study. The mineral composition, microstructure, and hydrophysical properties of the hard roof overlying the coal seam were analyzed. The characteristics of the weak-cementation strata that are prone to mud and collapse when encounte… Show more

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