1989 - Page 13
Warsop Main Closed After 95 Years
- Continued -
DECMTs (Double-ended, conveyor-mounted trepanners), RDSs (Ranging-drum shearers), stable-hole elimination and in-line ripping techniques were employed.
Half second delay detonators were used in development headings driven for a run round for mine cars. Millisec delay detonators used in other headings.
In the Titan or Deep Soft drift a 2 car radio-controlled cyclo-converter AC / DC hauler transported up to 90 men at a time, however according to John Rippon, Geologist, it was unpopular because of unreliability, and the walk out was long and hot.
There were 4 faces in the Clowne seam using DECMT machines and stable holes eliminated by using Dosco Roadheaders in advanced headings.
Deep Soft seam U1s unit (or panel) (2.4m section) had 2 single ended Ranging-drum shearers utilizing in-line ripping techniques for gate roads and at U19s (1.27m section) 2 single ended Ranging drum shearers and face ends using the ‘Littleton system’. Conveyors 1050mm trunks, 300 tonnes surge bunker.
In October 1988 the colliery went from 2 faces down to one production face due to poor geological conditions.
In August 1989 the pit was losing £200,000 per week and a total loss of £12.4m in 1988 / 1989. It was impossible to carry on.
There were underground connections between Shirebrook and Warsop cross measures drift at Top Hard through significant faulting and Roof Soft / Deep Soft circular arched roadway through a mono-clinal fold with little faulting. Both were sealed.
In the past Shirebrook worked a portion of Warsop shaft pillar coal in Top Hard, there being no immediate effect on the shafts at the time.
Coal production ceased in Aug 1989 and whilst salvage operations were being carried out the shaft ropes were examined and tested and found to be satisfactory so the Inspectorate allowed winding to continue albeit that the ropes had exceeded their statutory permitted time span.
The Cementation Co was sub contracted to close down the colliery.
The Shafts were abandoned in April 1991.
The Rapid loading bunker was demolished by explosion on 25th September 1991 and the first headgear on 23rd October. No2 shaft abandoned 4th April 1991 and No1 shaft 28th April 1991. The first headgear was demolished by explosion on 23 Oct 1991 and the second on 28 Nov 1991. The depth of the Permo-Trias water-bearing measures is not known. The shafts were filled with limestone chippings with concrete at insets and sump and finally capped with concrete.
- Top Hard 7’ 0” (2.13m) 1895 -11th November 1958 at 529 yards (484m), abandoned 28th November 1959, there was a connection through to Clipstone, the abandonment plans examined by George W Taylor HMI and Harold S Stephenson Divisional HMI. The seams dip gently to the East and South East at about 1 in 25 and the colliery ‘take’ is bounded by faulting to the North and West, whilst the take itself is divided by a North West / South East trough fault. Birklands drift was driven at 1in8 through the large fault. A 300hp endless haulage took runs of tubs to the pit bottom. The High Hazel seam was accessed via drifts from the Top Hard seam in the early 1950s and eventually shaft insets were made during the reconstruction. The Main Bright seam was developed from the High Hazels roadways in the same period and the Clowne seam and in 1973 finally the Deep Soft seam, developed in 1977 via cross-measures drifts from High Hazels at 724 yards (662m). Coal 2’ 4” (0.71m), seat earth 10” (0.25m), coal 3’ 10” (1.17m), seat earth 3” (0.09m), coal 1’ 1” (0.33m) 1977-24th Nov 1989 (the seam was a combination of the Deep Soft / Roof Soft and locally included Top Soft). Deep Hard -1959, High Hazel 4’ 2” (1.27m), developed by 1in6 drift up from Top Hard 1937-1979 (uneconomical) at 433 yards (396m), abandoned 30th Nov 1979
- Main Bright 4’ 6” (1.37m) 1937-1986 at 353 yards (323m) abandoned 15th July 1986, developed by drifts from High Hazel and Main Hard - Clowne 3’ 0” (0.91m) 1973-1986 seam at 326 yards (298m) dev from Main Bright by drifts, had been worked also. There was an uncharted 1in1 drift to Deep Soft and Deep Hard in 1920 in the Glebe district.
- Top Hard: 1895-28th November 1958. Production began late in 1895 worked by longwall advancing hand got stalls where a small team of men under the jurisdiction of a butty produced the coal. The boundary with Langwith was reached by 1909. Coal was hewed in the stalls and hand loaded into jotties / tubs. Boys then ganged the jotties / tubs by pony to the main haulage roads where the tubs were clipped onto a system of endless rope haulages to the pit bottom. Shirebrook boundary to the west was reached by 1918 and finished by 1935. Welbeck boundary to the east was reached by 1929 and worked out by 1936. Coal cutters, face and gate conveyors had been installed during this period. Loading points were in the main gates. However a new area was tried from 1943 worked by modern longwall panels but by Feb 1948 had been abandoned. Clipstone boundary to the south was reached in the late 1920s and finished by 1933. Further areas to the south east were worked out by 1945 and 1953. The last area to be worked was between faults and finished at Clipstone boundary in November 1958. Seam abandoned.
- High Hazel: First panel NW Oct 1938-Nov 1943
- Second panel NW Mar 1939-May 1944
- Third panel NW, 6 gates 1942-Nov 1946 Other side of pit
- Fourth panel S Oct 1944-Finish to narrow end Dec 1946
- Fifth panel S 5 gates, turn to SE July 1948, Finish July 1951 and Apr 1952
- Sixth panel NW June 1948 3 gates, extend to 4 gates Feb 1949-1952
- Seventh panel NW short life, Sep 1951-June 1952
- U50s NE Mar 1950-June 1957
- U51s SE Mar 1952, extend May 1952, turn right Oct 1955-Nov 1958
- U52s NW Dec 1950-Oct 1951
- U53s NE June 1952, very slow advance 1954-1956, Finish June 1957
- U55s SW Slow advance June 1952, very slow from 1954-Feb 1960
- U57s SW extended Mar 1953, slow 1954, very slow 1956, Finish June 1959
- U58s NW May 1954-Dec 1957
- U59s SW double unit June 1958-June 1961, re-head Dec 1962-Dec 1966
- U60s NW Dec 1954, shorten Feb 1956, extend June 1957, Finish Aug 1958
- U62s NW Sep 1957-June 1963
- U63s NE Oct 1958, drop side June 1959, extend Aug 1959, Finish Sep 1961
- U64s NE short life, Mar 1961-Aug 1962
- U65s SW double unit June 1959-Sep 1962
- U66s SW Sep 1962-Mar 1964
- U67s SW Dec 1959, extend Oct 1960, Finish Mar 1963
- ? SW short life Dec 1959-Nov 1960
- U68s NW Mar 1963-Nov 1964
- U69s SW Aug 1961-Mar 1964
- U70s NW, short life, Dec 1964-June 1965
- U71s SW July 1963-Oct 1965
- U73s SW June 1962- May 1965
- U74s NW June 1964-July 1966
- U75s SW May 1964, shortened Feb 1965, Finish May 1967
- U76s NW Sep 1965-Mar 1968
- U77s NW Dec 1966, turn Apr 1968, Finish May 1969
- U79s SW Nov 1964-July 1968
- U81s NW July 1968-Aug 1970
- U83s SE Apr 1970-June 1971
- U87s SE Apr 1969-May 1970
- U88s SW Aug 1970-June 1974
- U89s SW June 1971-Dec 1973
- U90s SW Apr 1974-May 1978
- U91s SW Jan 1975-Nov 1979. 40 panels. Seam abandoned.
Clowne: Dev from pit bottom
- U41 Feb 1973-Sep 1974, stopped for faulting, re-opened Mar 1976 June 1980
- U42 Mar 1975 Nov 1977
- U43 Nov 1977 Nov 1978
- U45 June 1974 Mar 1976
- U46 retreat Sep 1977 May 1980
- U60 1978 Sep 1981
- U61 Apr 1980 Sep 1983
- U62 Jan 1982 May 1986
- U70 Dec 1980 June 1983 dev from Main Bright
- U71 Mar 1983 Sep 1985. 10 panels or units. Seam abandoned.
- Main Bright: 50s June 1953 Sep 1954, slow to July 1955
- 70s June 1955 extend to Dec 1955 Jan 1958, stopped for fault, head through, re-start face June 1958 June 1959
- 100s Sep 1958 Sep 1959, heads forward, washout Sep 1960
- 101s Dec 1959 Sep 1960
- 103s Mar 1961 June 1964, stopped at fault, re-head, restart Sep 1965 Sep 1967
Finish from that dev
- 1s Nov 1964 June 1966
- 2s Feb 1966 Mar 1967, stopped re-headed, restart July 1967 July 1969
- 3s June 1966 Sep 1968
- 4s Mar 1967 Sep 1968
- 5s Mar 1968 Nov 1969
- U6 Aug 1969 Oct 1970
- U8 Dec 1968 Mar 1970
- U11 Nov 1969 Aug 1971
- U12 Feb 1970 Mar 1972
- U15 Oct 1970 June 1972
- U14 June 1971 Dec 1973
- U16 Mar 1972 Oct 1974
- U17 Mar 1972 Mar 1973
- U18 Sep 1974 Feb 1977
- U20 Dec 1973 Nov 1977
- U22 Mar 1977 June 1978
- U24 Mar 1978 Dec 1979
- U26 May 1979 Mar 1982. 24 panels. Seam abandoned.
- U1 Dec 1979 Feb 1987
- U19 Sep 1982 Dec 1985
- U2 May 1986 May 1988
- U3 Sep 1988 Sep / Nov 1989
- U5 Mar 1987 June 1989
- U6 Mar 1989 Aug 1989. 6 units. Seam abandoned.