Backfill mining techniques offer a suite of methods to control surface subsidence by replacing or supporting the void left by mineral extraction. Techniques range from cemented paste and hydraulic ...
CEBU, Philippines - To control backfilling activities which are feared to cause "untoward incidents," the Talisay City council approved Tuesday on first reading a proposed ordinance regulating it.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results