Tammetta Paul
Coffey Geotechnics, Level 18, Tower B, Citadel Towers, 799 Pacific Highway Chatswood, NSW, Australia.
Ground Water. 2015 Jan-Feb;53(1):122-9. doi: 10.1111/gwat.12153. Epub 2014 Jan 9.
The change in hydraulic conductivity (K) above subsided longwall panels at underground coal mines is determined using a data base of pre-mining and post-mining K measurements made at multiple locations down the depth profile at each of a number of sites worldwide. Results show that, following caving of roof strata, there is a clear difference in the magnitude of changes in K above and below the top of the collapsed zone. Within the collapsed zone, relative increases in K are larger, even when taking account of measurements made in potentially unsaturated strata. A generalized conceptual model is presented for K change above subsided longwall panels. These results form a third independent database supporting the height of desaturation reported in an earlier study.
利用世界各地多个地点沿深度剖面在多个位置进行的开采前和开采后水力传导率（K）测量数据库，确定了地下煤矿采空长壁采场上方水力传导率（K）的变化。结果表明，顶板岩层垮落之后，垮落带顶部上方和下方K值变化的幅度存在明显差异。即使考虑到在潜在非饱和岩层中进行的测量，垮落带内K的相对增加也更大。针对采空长壁采场上方K值变化，提出了一个通用概念模型。这些结果形成了第三个独立数据库，支持了早期研究报告的非饱和高度。
