Investigation into Influences of Hydraulic Fracturing for Hard Rock Weakening in Underground Mines

• Published in: Applied sciences Vol. 14; no. 5; p. 1948
• Main Authors: Cao, Xu, Wu, Saisai, He, Qingyuan
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.02.2024
• Subjects: Analysis; Coal industry; Coal mining; Crack initiation; Crack propagation; Drilling; hard roofs; Hydraulic fracturing; Investigations; Mineral industry; Mines; Mining industry; mining pressure; Numerical analysis; numerical simulation; Oil wells; Propagation; Roofing; Shear tests; Simulation; Simulation methods; Stress (Psychology); Stress concentration; Tensile strength; Water flooding

The long overhanging distance of hard roofs and long-collapse steps induces a large area of suspension on the working face in underground coal mines, resulting in excessive pressure and deformation on the surrounding rocks of the adjacent roadway in the work face, which seriously threatens the safet...