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通过7个探查钻孔查明了豫中某井田煤层底板寒武系灰岩上段岩性、岩层组合关系以及岩溶发育—充填情况.随后,提出了“寒武系灰岩上段至少25 m层段岩溶不甚发育、且具有复杂组合关系的隔水层结构,可作为隔水层考虑”的重要认识,并在分析寒灰上段岩层的组合形式及其阻隔水作用的基础上对其综合阻隔水性能进行了评价.研究表明,将寒灰上段岩溶不发育段作为隔水层考虑将更符合实际.上述认识对该井田底板防治水工程的开展以及井巷的开拓等起到了非常积极的作用.
Through the seven exploration drilling holes, the lithology, rock formation combination and karst development-filling in the upper Cambrian limestone floor of a coal seam floor in a coalfield of Yuzhong coal mine have been identified. Subsequently, a “Cambrian limestone at least 25 m Section karst less developed, and has a combination of complex structure of the aqueduct structure, can be used as the aquitard to consider ”important understanding, and in the analysis of the combination of the formation of cold gray rock formation and its barrier water on the basis of its comprehensive The water barrier performance was evaluated.Research shows that it is more practical to consider the underdeveloped karst in the cold ash as a water-impermeable layer.The above understanding has played a very positive role in the prevention and treatment of waterworks in the mine field and the development of the roadway effect.