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Post by dazbt on Jun 16, 2014 5:38:51 GMT -5
Was that two sections, ie face side and goaf side like the first conveyor mounted trepanners Daz?? Not quite J, the four main sections were inline on the face side of the AFC but canopy sections were attached to these main sections and bridged over the AFC, attached to each end canopy was a goaf-side steering ram combined trapping shoe. Low Height Configuration.  |
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Post by John on Jun 16, 2014 5:57:23 GMT -5
Not quite J, the four main sections were inline on the face side of the AFC but canopy sections were attached to these main sections and bridged over the AFC, attached to each end canopy was a goaf-side steering ram combined trapping shoe. Low Height Configuration. |
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Post by quimbyj1745 on Nov 4, 2014 15:19:58 GMT -5
My first job as an official was at Dexter pit in 1964. Daw mill was designed as a ventilation extention to Dexter pit. The face was 13s two yard worked by AB floor mounted trepanner working to the dip. The height of extraction being 4ft 6inches. This face was in trouble, the trepanner was not suited to working to the dip and another point not mentioned was that the undercut induced breaks in the roof, particully after a weekend stand and the roof cutting turret tended to rag the coal tops, resulting falls of roof.
After a period of months persisting with the trepanner it was decided to replace the trepanner with a bjd rope hauled shearer. The effect was dramatic, the first cut on a Sunday night shift resulted in coal tops throughout the face and at the end of the shift we managed 1 and 1/2 cuts. this was the first time ever of this face. In fact, on reporting to the undermanager in the morning, he dropped his fag, told me he didnt believe me. This face was fully manned on day shift and a skeleton shift on night shift but it went from 4 cuts a week to a consistant 15.
As a matter of interest I reported to th e undermanager to be told to inspect the main roads down to 20s old face line. he told me that the Daw Mill development team had knocked a hole through on the night shift and I was to get the honour of being the first man to travel underground from Dexter to Daw Mill.
PS I swore from the experiance on 13s at Dexter that there would never be a 13s face again if I had any say in the matter.
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Post by dibber on Nov 9, 2014 13:40:13 GMT -5
going back to the original post "which is better"?
I Worked at Manvers Main Colliery,and we worked two different seams, the 30" Silkstone seam, which was very gassy, and because we had a disk fire with a shearer, that seam used 120hp DECMT as the main machine with a Dosco in seam miner in the main gate, and a short run AB16 shearer in the tail end.this reduced the risk of fire as the auger broke the coal into larger lumps and did not "Cut" the coal, which was a heavy steam coal
In the Swallow wood/ Haigh Moor seam we used both AB 16 & AB 17 Shearers, we had an AB 16 "Neuclionic" machine that used a radioactive isotope in a lead lined box, on a ram behind the disk that went to the roof to measure the roof thickness, this then controlled the two rams on the ranging under-frame, after this got "ripped off" a few times, the isotope got mounted on the top of the gear-head, and a stronger isotope used, and an AB16 in the tail end run and a AB15 "Waffler" in the main gate advanced heading
we also had on trial the first Hydraulic Haulage for the AB17 Double End Floor Mounted Ranging drum Shearer, (Daz Geoff Salkeld worked on this face, i was his Apprentice)
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Post by colly0410 on Sept 28, 2016 14:54:13 GMT -5
AB also made the Trepan Shearer that I used, and the trepanner that I drove was AB.
I remember once in my UnderOfficial days going into a fitting shop at one colliery and receiving a surprise. As a youngster I had always taken
The Eagle comic, which always had as its centrefold a cutaway drawing of a piece of modern machinery, and there on the wall of the fitting shop was one of these cut-away drawings. Hope they used a little more than this.I used to read the Eagle & remember those 'modern machinery' drawings, can't remember a shearer or trepanner shown though. They did a promotion that if you saved so many cut out vouchers & sent them off you got a free pass to go to Butlins for the day. Went on day trips to Butlins at Skeggy 2 years running... |
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Post by John on Sept 28, 2016 15:01:35 GMT -5
I used to read the Eagle & remember those 'modern machinery' drawings, can't remember a shearer or trepanner shown though. They did a promotion that if you saved so many cut out vouchers & sent them off you got a free pass to go to Butlins for the day. Went on day trips to Butlins at Skeggy 2 years running... |
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Post by kundyhole on Oct 1, 2016 9:21:50 GMT -5
John an old paper titled Face Profitability and cost per therm
!     from my Grandfathers pit Florence ( North Staffs ) dated 1968 just trying to add some input to the debate  Glück Auf Max |
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