Invention Grant
- Patent Title: Longwall mining roof supports
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Application No.: US14087839Application Date: 2013-11-22
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Publication No.: US09670777B2Publication Date: 2017-06-06
- Inventor: John Holme
- Applicant: Joy MM Delaware, Inc.
- Applicant Address: US DE Wilmington
- Assignee: Joy MM Delaware, Inc.
- Current Assignee: Joy MM Delaware, Inc.
- Current Assignee Address: US DE Wilmington
- Agency: Michael Best & Friedrich LLP
- Main IPC: E21D23/00
- IPC: E21D23/00

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.
Public/Granted literature
- US20140077580A1 LONGWALL MINING ROOF SUPPORTS Public/Granted day:2014-03-20
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