Deformation and damage characteristics of surrounding rock and zonal support countermeasures for a dynamic pressure roadway in deep back-mining

Surrounding Rock Deformation Mechanisms and Control in Deep Mining: A Comprehensive Review

Measurement of surrounding-rock deformation and support-resistance demand in roof-cut automatically formed roadways of inclined thick coal seams

The deformation control of roof-cut automatically formed roadways in inclined thick coal seams is strongly dependent on the reliable measurement of roof subsidence, rib convergence, stress redistribution and support-resistance demand. Taking the 1703 fully mechanized top-coal caving face of Hongling Coal Mine as an e...

Overburden Strata Synchronous Breaking and Dynamic Load Mine Pressure Mechanism of Cross-Ditch Mining in Close-Distance Coal Seams

Repeated mining of shallow-buried close-distance coal seams can disturb the fractured strata remaining in the goaf of the upper coal seam. Under gully terrain, mining disturbance is coupled with surface-relief effects, which may reactivate the overburden structure and induce dynamic strata-pressure behavior. In particu...

Numerical Simulation Research on Unloading and Fracturing Characteristics of Immediate Roof Rock in Underground Coal Mining

Underground coal mining can induce deformation and failure of overlying strata and ground surface, which seriously endangers the safety of human life and property. During mining, the immediate roof rock successively experiences initial caving (fixed support on four sides) and periodic caving (fixed support on three sid...

Deformation failure mechanism and asymmetric coupling support technology of roadways in large dip angle fully mechanized top coal caving mining

One side of 7403 fully mechanized top coal caving mining with a large dip angle in Zouzhuang Coal Mine is a gob; the return airway is excavated along the floor, while the haulage roadway is excavated along the roof, and the working face is mined along the coal seam floor. The deformation and failure of the surrounding...

Influence of Fault Geometric and Mechanical Parameters on Surrounding Rock Behavior in a Deep Fault-Crossing Roadway