Fracture Propagation and Hydraulic Properties of a Coal Floor Subjected to Thick-Seam Longwalling above a Highly Confined Aquifer

Figure 1

Geological data of the Longquan coal mine: (a) contour map of Ordovician limestone water inrush coefficient of the no. 4 coal seam in the Longquan coal field; (b) lithological sequence of the 4301 panel.

(a)

(b)