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Post by John on Jul 12, 2008 9:03:54 GMT -5
This was the last face the AM400 shearer cut, longwall 8. The chocks are Gullick, face signalling was the Davies of Derby SIVAD system, gate end boxes were Wallacetown (Wecol) A67's. Shearer Anderson Strathclyde AM400.  |
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inbye
Shotfirer.
Posts: 114
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Post by inbye on Jul 12, 2008 14:09:43 GMT -5
That really is a neat & tidy looking face line..........looks like they set it out using a straight edge...
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Post by John on Jul 12, 2008 14:27:11 GMT -5
That really is a neat & tidy looking face line..........looks like they set it out using a straight edge... We never had many problems with the face going out of line mate, they were all retreating faces. About once a month, the Deputy on one of the shifts would set a string line out, but it was never far out of line, not even the next several faces I worked on with the AM500 shearer and Dowty chocks. Good machine operating kept a level floor too, we cut just above the dirt and used the dust as an indicator, the roof was just "eyed". During my several years there, we only had one major face problem and one main gate collapse. We lost several weeks due to a major fall on the face extending forward of us. IT WAS A MESS! Experts from all over the world were called in for suggestions on how to correct the problem, all took one look and said "you've got problems" They even flew some NCB/BC longwall engineers out from the UK, they said "Wow, thats a mess, with a few expletives, of course. Damned if we know what to do! So our Undermanager who was studying for his Managers ticket spent hours research similar problems encountered elsewhere, came up with a plan, gotit approved by the Manager and Inspectorate, and set to work. He had a company of contractors drill holes in the high roof of the fall, many yards ahead in the faceline of the seam, and all holes were injected with a liquid foam resin. Took them a couple of weeks working around the clock. Our blokes were timbering over the chocks, plus bolting and meshing to form a false roof for the chock roof beams. Then the day of reckoning came, we started cutting again, everything held up and we lost no more time. The undermanager wrote a thesis on the repairs as part of his Managers course. The other problem was a main gate collapse, we don't know why it happened, but it caused major damage to the stageloader. |
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Post by encyclopediazhao on Jun 25, 2009 9:26:09 GMT -5
Do anyone has video about room and pillar mining  |
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Post by John on Jun 25, 2009 11:45:21 GMT -5
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