Introduction: The first two faces at Riccall Mine were HO2DRs known as D2s and HO1CRs known as C1s. They started production in January 1988. The ‘C’ coal faces were at the south side of the mine. The ‘D’ coal faces were at the north of the mine. The first eight coal faces were all developed from the north and south return roadways, retreating from east to west with the seam dipping to the east. During the development and subsequent installation of D2s face a huge, simultaneous work program was underway to install the coal clearance system to Gascoigne Wood Mine.
The first north side face, HO2DRs.
The first face at the north of the mine was D2s. This face was around 900m from the pit bottom and had a face length of 200m. The Tailgate was developed using a Lee Norse LN800 1TT continuous miner. This machine was an american specification machine, the first of it’s kind in the UK. The machine had 120v control circuits unlike UK machines which had intrinsically safe, pilot voltage, control circuits. The machine had to be modified to pilot control to operate from UK Gate End Boxes before it was accepted into a UK coal mine. All electricians who worked on this machine had to complete a two day training course before working on the machine. This heading was the first development at Riccall Mine to trial roof bolting as a supplementary support so was monitored very closely. The machine was extremely powerful and would cut out in less than 10 minutes. The gate length was 1600m with the machine also cutting the face line. The face was at a depth of 850m from the surface.

H403s maingate Lee Norse LN800 Continuous Miner
The Main Gate was developed using a Dosco MK2a Roadheader Revised Hydraulics. The supports were identical to the ones used on C1s face with a Cruciform leg, on the face side, for extra support when the shearer cut into the main gate. The main gate progressed really well due to the amount of coal in the face of the heading which made cutting easier. Both C1s and D2s were supplied with equipment using Clayton BoBo battery locomotives.
The main difference between the north faces and south faces were the face equipment manufacturer. The A.F.C., stageloader, crusher / sizer, coal face shield supports and powerpack pumps and tank were supplied by Gullick Dobson. The face supports had chock interface units which could be set to advance the A.F.C. and face supports automatically in zones or by shearer initiation and were lit throughout. Both the north and the south faces used Davis Derby signalling and audio systems, with a SIVAD A.F.C. and stageloader control and monitoring unit mounted on the main gate pantech. The face signal and audio system cables had camlock cable entries for easier fault finding.
The shearer was an Anderson Strathclyde AM500 DERDs
Between the Stageloader drive head and the pantech was a Hausherr Dinting Machine. This gave the roadway in front of the stageloader delivery sufficient height to move whilst retreating.
The pantechnicon with the face electrical switchgear, cables, pumps, tanks and transformers was identical to C1s face which was monorail mounted. The double acting ram used for moving the equipment out whilst the face retreated, was rated at 85 tonnes and was mounted at the outbye end of the Pantech. As the pantech moved outbye on the monorail, the 6.6kv 631 pliable wire armoured cable also mounted on the monorail, bunched up creating figure eights. When the face had retreated 95m the Wallacetown M82 face isolator was moved outbye 100m and the 631 cable was pulled out straight allowing the face to retreat another 100m.
This face, due to gate length, had a tandem conveyor. The main gate end had the same overband magnet as C1s, removing any metal debris before delivering the coal onto the steel cord conveyor.
D2s was a success along with C1s and continued producing well until 100M from the finish mark where a sandstone intrusion fault 30m from the main gate end, stopped the face. Huge sandstone lumps were causing severe problems in the fault area with one falling onto the ranging arm and lifting the 60 tonne shearer off the haulage rack unit. Boring and firing was used for a few days but due to the shearer being unable to cut the sandstone through the fault and very dangerous face conditions the face had to be stopped early on 19th December 1988.
The next face to start production at the north side of the mine was H403s. This face was a carbon copy of D2s in face and gate length. The main gate was developed using the ex D2s tailgate Lee Norse LN800 1TT Continuous miner with the tailgate driven with a new JCM 12 Continuous Miner. Both gates were supported using arches.
Due to problems with soft roof on the Riccall coal faces mentioned in another post and the base lifter ram modification to the face supports, D3s(H403s) was installed with an new, modified Gullick face kit and shearer. This face had a AM 500 DERDS Selectronic M.I.D.A.S. shearer designed to overcome the friable roof.
The M.I.D.A.S.( Machine Information Display and Automation System) had been trialled at Wath Main and Silverwood Collieries on single ended shearers and was designed for automatic steering of the shearer. When installed, the shearer transmitted data to the surface control room, via the mine transmission system using a new type of trailing cable called a type 7S, with transmission cores, to relay the data to the main gate and then to the surface.
Using the onboard system called a Machine Automation Digital Display(M.A.D.D.) , the shearer had parameters set, including seam section, face length and amount of coal top to be left. During cutting, the machine had a roof follower arm mounted on top of the shearer ranging arm touching the top of the seam. As the shearer progressed through the face, the follower arm gathered data on the coal seam undulations from a unit mounted at the base of the follower arm, transmitting it to the M.A.D.D. unit. At the end of the cut, an end of face detector sent a signal to the M.A.D.D. unit to save the last cut information, along with data gathered from inclinometers on the shearer called Face Advance Tilt(F.A.T) which measuring face advance angle of the seam. On the return cut the shearer, using the last cut data and automatically steered the ranging arm, using solenoid operation of the machine to control the operation. The shearer also had servo operated control of the shearer speed with a push button and electronic speed controller called a PB8 End Station. The shearer on D3s was a double ended shearer so the electronic control system was modified to operate and gather data whilst cutting coal. The data was then used to control the two cutting drum on the return strip of coal.
The pumps and tanks were identical to D2s and were monorail mounted. The only difference was the electrical gate end boxes, which were the ex C1s Wallacetown S.I.M.O.S. equipment. The face started on 3rd January 1989. The face performed OK due to the M.I.D.A.S. shearer overcoming the weak roof, but had it’s problems in certain areas and took 12 months to complete finishing on 17th January 1990.

The D3s face team with the M.I.D.A.S. shearer expert, shift charge engineer, Dave Greenwell.
The next face to be developed was H404s using 2 x Lee Norse LN800 2tt continuous miners. Once the LN 800 machines were proven, they were the mainstay for all the Riccall Mine face developments. The Lee Norse machines at Riccall used a specially developed, heavy duty, bridge conveyor bolted to the tail delivery which had a Lioness drive to clear the coal. The conveyor was wider than a standard bridge conveyor and could clear the coal very quickly. The heading machine cable handler was a Purdy monorail system which had a double runner system. This was in effect 2 monorails welded together. The machine cable moved in the lower rollers whilst the entire monorail could be moved forward on the roof mounted top rollers. This way only the roof mounting brackets, with runners needed moving forward. Both H404s headings, which were 1100m, were supported using roof bolts as the primary supports.


Riccall Mine north side faces.
H404s main gate was a different face design to H403s as it had a floor mounted pantechnicon with remote chock pumps. The electrical switchgear was Baldwin and Francis B.F.S. It was designed to be installed as part of the stage loader so was inline with the conveyor. It was a complete nightmare to install and maintain due to the sliding platform access for the switchgear, and the type 201b cables running over the top, in the very tight gap. A few fingers and hands were trapped during the installation. The transformers were rail mounted on skids with a monorail system to transfer the cable supplies into the switchgear.
The automated, remote, face support power packs were installed at the main gate end. The pressure supplies to the face were supplied through high pressure, threaded flanged jointed, pressurised pipes. The flexible hoses to the face were connected through a valve bank for isolation purposes at the face. This was the only time this system was ever used at Riccall Mine.
The shearer was an identical AM 500 DERDS Selectronic M.I.D.A.S. shearer used on H403.
The longer, 230m face started in February 1990 and due to the advanced technology of the shearer progressed in some very heavy face conditions. The face finished 50m early in October 1991 due to a washout. The face was salvaged quickly and re-installed on H406s.

H404s tailgate at 760m mark
The next face was H405s, which used the ex H404s, Lee Norse LN800 continuous miners to develop the face gate headings. The bolted headings progressed quickly with the face ready for installation in late 1991. The face supports, power pack pumps and tanks were Gullick Dobson, with the power packs and tanks installed at the face. The main gate electrical equipment was the overhauled, ex H403s, but totally re-designed to be rail mounted. All faces installed after Jan 1991 were rail mounted pantechnicons due to the face headings using total roof bolting as the support system.
The 250m long, H405s face performed well and finished production in April 1992.
The next face to start production was H406s which was the only face taken off the North Intake nearly opposite H405s. This face was a 200m face with 700m gate roadways and had identical equipment to H405s, except the shearer which was a standard AM 500 DERDS . The face started production in Jan 1992 and finished in July 1992. When the faces at the north of the mine were completed the Gullick Dobson face equipment and 2 of the LN 800 continuous miners were used at the west of the mine.
In 1992, Riccall Mine was the first one of the Selby Mines to produce over 2 million tonnes producing 2,200,000 million tonnes. In 1993 Riccall Mine produced 2,600,000 million tonnes of coal. In 1994 Riccall Mine produced 3,060,000 tonnes of coal. These outstanding figures were produced from 12 longwall coalfaces. Two faces were at the north of the mine, 4 faces were at the west of the mine, two faces were at the east of the mine and 3 faces were at the south west of the mine.

































