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Problems in coal mining : ウィキペディア英語版 | Problems in coal mining
If the coal seam reaches a fault, the seam may be significantly displaced, depending on the type of fault and its offset. Machinery trying to mine the coal may not be able to reach the displaced seam, if the displacement is too large. Coal mines use a combination of boreholes and high-resolution seismic reflection data to identify the larger faults and avoid the most faulted areas at the mine planning stage. ==Water table==
If the water table is too high, the mine will flood with water. While mining, water needs to be constantly pumped out and this is expensive.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Problems in coal mining」の詳細全文を読む
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