Table 1.
Statistics of water inrush disasters during coal mining under thin bedrock conditions in China.
Fig 1.
Contour map of stratum thickness.
(A) Bedrock thickness. (B) Cenozoic overburden thickness.
Fig 2.
The stratigraphic situation revealed by N.4 borehole.
Fig 3.
Collaborative deformation and failure of clay layer and bedrock.
Fig 4.
Deformation and force diagram of clay layer.
Fig 5.
Stress conditions of the unit body.
Table 2.
Physical and mechanical parameters of the model.
Fig 6.
Numerical simulation model.
Fig 7.
The failure state of clay layers with different bedrock thicknesses (Y = 200 m section).
Fig 8.
The failure state of clay layers with bedrock thickness 53 m (Y = 200 m section).
Fig 9.
The failure state of clay layers with bedrock thickness 48 m (Y = 200 m section).
Fig 10.
The failure state of clay layers with bedrock thickness 43 m (Y = 200 m section).
Fig 11.
The failure state of clay layers with bedrock thickness 38 m (Y = 200 m section).
Fig 12.
The failure state of clay layers with bedrock thickness 33 m (Y = 200 m section).