Design of Initial Mining Pressure Relief Scheme for Large‐Size Mining Face: A Case Study

Key Points

• This research aims to develop a pressure relief scheme for large-size mining faces based on numerical modeling and field tests.
• Conducted numerical modeling analysis of mining faces of different sizes.
• Compared abutment pressure and stress concentration factors between actual and designed mining faces.
• Developed a hydraulic fracturing pressure management plan through theoretical studies and computational models.
• Conducted field testing of the proposed pressure management plan.
• Large-size mining faces exhibit greater peak abutment pressure compared to general-size faces.
• Significant stress concentration factors were observed in large-size mining faces.
• Initial mining leads to substantial displacement of the roof, floor, and sides in large-size working faces.
• The developed hydraulic fracturing plan successfully addresses intensified pressure from expanded mining faces.