Research Article
Floor Failure Evolution Mechanism for a Fully Mechanized Longwall Mining Face above a Confined Aquifer
Figure 11
Development range of the plastic zone for the floor at different advance distances: 80 m mining advance by (a) caving and (b) backfilling; 120 m mining advance by (c) caving and (d) backfilling; and 160 m mining advance by (e) caving and (f) backfilling.
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(b) |
(c) |
(d) |
(e) |
(f) |