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单词 bell pit
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Examples ofbell pit

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In addition to the three main mining areas, there are many open-castbellpitmines along the lines of the main geological faults.
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They may be old bell pits, which have a small hole in the top.
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Example from the Hansard archive. Contains Parliamentary information licensed under theOpen Parliament Licence v3.0
To the western side of the region, there used to be cutterills, drift mines and bell pits.
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Hansard archive
Example from the Hansard archive. Contains Parliamentary information licensed under theOpen Parliament Licence v3.0
It was previously exploited for coal resources which is evident by large sections having undulating surfaces caused by the sinking of bell pits.
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Initially obtained from surface workings, it would later have been mined in shallow bell pits.
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The other early method used was the digging of bell pits with lateral tunnels, called drifts, following the vein.
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The rock was dug from bell pits, and iron smelted here was worked at a forge nearby.
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Only small amounts of coal could be obtained by these methods and bell pits were also dug.
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These included at least 52 bell pits, some with deeper shafts and 16 adits.
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The early pits were adits where coal outcropped or bell pits where coal was close to the surface.
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Typical methods for extraction included drift mining and bell pits.
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Mining was initially limited to bell pits until the arrival of steam engines, which along with improved ventilation, made possible much deeper pits.
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The pits, at that time, were basically bell pits and situated throughout the area where a network of small wagonways was built to take the coal to the canal.
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The early mines would have been drift mines or adits where coal seams outcropped or by shallow bell pits where coal was close to the surface.
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Bell pits often flooded due to a lack of a drainage system.
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Before the steam engine, pits were often shallow bell pits following a seam of coal along the surface, which were abandoned as the coal was extracted.
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In medieval times ironstone and, later, coal were mined, in particular from bell pits: localised mine shafts, one of which has now flooded to form a lake.
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Bell pits were common in the 17th and 18th century.
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更新时间:2024/12/28 1:34:45