Longwall mining roof supports
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 26, 2013
Grant Date -
Jan 13, 2011
app pub date -
Jul 9, 2010
filing date -
Jul 10, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A longwall mining system includes at least one face end roof support having a longitudinal length, and at least one near end roof support adjacent the face end roof support. The near end roof support has a longitudinal length substantially shorter than the face end roof support longitudinal length. There is also at least one face roof support adjacent the near end roof support, and the face roof support has a longitudinal length substantially shorter than the near end roof support longitudinal length. There is also a forward conveyor extending forward to and attached to the face end roof support, the at least one near end roof support, and the at least one face roof support, and a rearward conveyor extending rearward of and attached to the face end roof support, the at least one near end roof support, and the at least one face roof support. This creates an effective cave line at an angle to the coal face, that helps reduce the goaf pressure on the face end, thereby increasing the stability of the main gate roof support.
First Claim
Family
International Classification(s)
Cited Art Landscape
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