Mine Entry

The Coal Authority has records of over 170,000 mine entries within the UK captured in the National Coal Mining Database from a variety of sources including abandonment plans, geological and Ordnance Survey plans. After 1872, there was a requirement for a coal mine owners to deposit their working plan for the mine with the State when the mine closed. Hence, there may be un-recorded mine entries to which the Coal Authority has no information or knowledge. The layer shows the best-plot position for each mine entry from the information held by the Coal Authority together with any treatment to that entry.

Mine entries indicate the entrance into a mine working, for which there are two types: shafts and adits. Mine shafts are vertical or near vertical entrances to a mine whereas adits are a walkable entrance to a mine as shown on plans held by the Coal Authority. Mine entry positions are taken from a variety of plan sources which vary in age, scale, accuracy and condition. These factors determine the accuracy of the mine entry position derived.

英国煤炭管理局拥有超过17万份矿井入口记录，这些记录被收录在国家煤炭采矿数据库中，来源包括废弃计划、地质和军事测绘计划。自1872年起，煤炭矿主在矿井关闭时需将矿井作业计划提交给国家。因此，可能存在未被记录的矿井入口，对于这些入口，煤炭管理局缺乏相关信息或知识。该图层展示了煤炭管理局所持信息中每个矿井入口的最佳绘图位置，以及对该入口所做的任何处理。
矿井入口指示矿井作业的入口，分为两种类型：竖井和巷道。矿井竖井是通向矿井的垂直或近乎垂直的入口，而巷道则是煤炭管理局持有的计划上所展示的可步行进入矿井的入口。矿井入口位置来源于各种计划源，这些源计划在年龄、比例、精确度和状况上存在差异。这些因素决定了矿井入口位置的精确度。