彝良毛坪铅锌矿430 m中段配电硐室突水治理

    Treatment of water inrush in distribution chamber at 430 m middle level of Yiliang Maoping Lead-Zinc Mine

    • 摘要: 突水淹井是水文地质条件复杂的岩溶裂隙含水层充水矿山常见灾害,具有造成损失大、治理恢复困难等特点。在我国西南地区有大量受上古生界石炭系、二叠系岩溶裂隙含水层充水影响的铅锌矿山、铝土矿山,存在潜在突水淹井的危害,但以往鲜有文献论述。以彝良毛坪铅锌矿突水淹井治理为例,通过对突水后观测孔水位,原有巷道涌水点水量变化及淹井后地下水渗流场、导水构造的研究,进一步验证了突水水源及导水通道,总结了突水致灾机理。针对性地采取了“控、阻、封”相结合的治理方案,先在上部巷道施工定向透巷钻孔构建巷道堵水段,再进行突水水源区导水断层注浆封堵。该治理方案既治标又局部治本,安全、高效地治理了突水,恢复了生产。避免了传统井下“先排后堵”及地表“先堵后排”治理方案可能进一步恶化水文地质条件、注浆效果不佳、井下近距离封堵安全风险大的缺点。分析总结的突水水源及通道研究方法、突水致灾机理及采取的“控、阻、封”相结合的治理方案,对我国西南地区类似大水矿山的突水淹井治理有较强的借鉴意义。

       

      Abstract: Water inrush and flooding wells are common disasters in karst fissured aquifer water filled mine with complex hydrogeological conditions, which have the characteristics of causing large losses and difficult governance and recovery. In Southwest China, there are a large number of lead-zinc and bauxite mines affected by water filling of Upper Paleozoic Carboniferous and Permian karst fissure aquifers, and there are potential hazards of water inrush and flooding wells. but there are few literatures in the past. Taking Maoping Lead-Zinc Mine of Yiliang as an example, by studying the water level of the observation hole after water inrush, the change of the water intake point of the original roadway, the seepage field of groundwater and the structure of water diversion after water inrush are studied, the source of water inrush and the water diversion channel are further verified, and the disaster mechanism of water inrush is summarized. It adopts the combination governance plan of “control, blocking and sealing” is adopted. Firstly, it constructs the water blocking section in the upper roadway by directional penetrating hole construction, and then carries out the water diversion fault grouting and sealing in the water source area of the water inrush, which not only treats the symptoms but also the local root causes, so as to treat the water inrush safely and efficiently and restore the production. Avoiding the disadvantages of traditional governance plan of “drainage before plugging” in the underground and “plugging before plugging” in the surface, which may further deteriorate hydrogeological conditions, poor grouting effect, and large safety risks of downhole close plugging. The analysis and summary of research methods for water inrush sources and channels, the mechanism of disaster caused by water inrush and the combined governance plan of “control, block and seal” adopted have strong reference significance for the treatment of water inrush flooded wells in similar large water mines in Southwest China.

       

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