Abstract Flooded mine workings represent potential aquifers for shallow geothermal development projects. However, determining the collapse state of such workings in advance of drilling, and predicting their hydrogeological properties can be challenging, therefore developing an understanding of the products of mine collapse is important. We investigate the internal structure of collapsed pillar and stall mine workings exposed through coastal erosion near Whitley Bay, NE England. Our data suggests these workings collapsed in stages, leaving a clay-rich anthropogenic sedimentary layer consisting of collapse breccias and muds that will have gradually reduced the water capacity of the mine workings as collapse proceeded.

中文翻译：

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废弃矿柱和失速煤矿的坍塌过程：对浅矿地热能的影响

摘要 淹水矿井是浅层地热开发项目的潜在含水层。然而，在钻井之前确定此类工作的坍塌状态并预测其水文地质特性可能具有挑战性，因此了解矿井坍塌产物非常重要。我们调查了英格兰东北部惠特利湾附近因海岸侵蚀而暴露的倒塌支柱和失速矿井的内部结构。我们的数据表明，这些矿井分阶段倒塌，留下由倒塌角砾岩和泥浆组成的富含粘土的人为沉积层，随着倒塌的进行，矿井的水容量将逐渐降低。