Spatial and Temporal Distribution Law and Influencing Factors of the Mining-Induced Deformation and Failure of Gas Boreholes

Figure 11

Evolution laws for the stability of the borehole with advance of the coal face. (a) Evolution of the dangerous location and shear slip of the borehole with advance of the coal face. (b) Evolution of the dangerous location and safety factor of borehole compressional failure with advance of the coal face.

(a)

(b)