摘要
第四纪底砾层直接覆盖在谢桥煤矿煤系地层之上,其隔水性能影响到防水煤柱的合理留设。为论证底砾层的隔水性,分析研究其赋存特征、岩性组合,并对其进行抽提水、简易水文和水动态观测试验。结果表明:第四纪底砾层不含水,渗透性极弱而且具有良好的隔水性,是阻碍新生界中部含水层危害矿井安全开采的良好隔水层,为合理留设煤柱、确定回采上限提供可靠的依据。
The main target coal seam of Xieqiao Mine is directly covered with the Quaternary bottom gravels, whose impermeability affects the reasonable retainment of waterproof pillar. To demonstrate the impermeability of the bottom gravel layer, its distregulation and lithology are analyzed and studied. In addition, tests for pumping, simple hydrology and dynamic observation of hydrograph are conducted. The result shows that the Quaternary Bottom Gravels is a better aquifuge, which prevents effectively the groundwater of upper aquifer from infiltrating to the mining area and offers scientific basis for retaining reasonably the waterproof pillar.
出处
《安徽理工大学学报（自然科学版）》
CAS
2003年第3期1-5,共5页
Journal of Anhui University of Science and Technology:Natural Science
