Dear all
It's clear that rate of movement is slow down.
It would be better to get filling if you could calculation rate of dry and wet period separately.
My idea now, western part (Section 1 and 2 ), it has to be mined parallel to bedding plane.
Undercut of bed is not possible.
Eastern part (Section 3), may have to cut some topmost part out before excavate coal in lowest part as mining plan.
Boundary of cut should be determined after some calculation.
Horizontal drain holes may be tried to intercept water in slope.
If the mine staffs have any idea could let me know for discuss.