| 摘要 |
<p>Disclosed is a method of mining or extracting a support pillar from an underground room and pillar mining operation which includes forming (by eg forming top and bottom wedge shaped cuts) at least one removable segment in a pillar (7) and moving (eg pulling) the segment substantially intact from its original location (10A) to a mining position (10C) distal from its original location, operatively from where the segment may be mined. Also disclosed and claimed are sequences of pillar removal to control caving during pillar recovery.</p> |
