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| 1 | 变质量胶结破碎岩石非Darcy流渗透特性试验研究显示文摘陷落柱被揭露并与地下水导通后,泥石胶结层的渗透过程伴随着质量流失,是一种演变多孔介质.利用自主研制的破碎岩石渗透系统,进行了以水泥为胶结剂的含盐胶结破碎岩石渗透试验,分析了含盐量、水泥掺入量和岩石颗粒级配3种因素对变质量胶结破碎岩石渗透特性的影响.研究结果表明:盐颗粒溶解和岩石颗粒迁移共同影响胶结破碎岩石渗透性,渗透流量随时间发生变化,先上升后下降并最终趋于稳定;含盐量越多,渗流稳定历时越长.渗透率的量级为10^(-15)~10^(-13)m^2,随着水泥掺入量的增加,试样渗透率单调减小;相同水泥掺入量下,随着Talbot幂指数n的增大,试样渗透率单调增大;随着含盐量的增加,渗透率先缓慢增大后加速增大,40g为拐点. | 郁邦永 陈占清 吴疆宇 王路珍 | 2017 | 中国矿业大学学报2017，46，2： | 7 |
| 2 | Relationship between water inrush from coal seam floors and main roof weighting显示文摘A water-resistant key strata model of a goaf floor prior to main roof weighting was developed to explore the relationship between water inrush from the floor and main roof weighting. The stress distribution,broken characteristics, and the risk area for water inrush of the water-resistant key strata were analysed using elastic thin plate theory. The formula of the maximum water pressure tolerated by the waterresistant key strata was deduced. The effects of the caved load of the goaf, the goaf size prior to main roof weighting, the advancing distance of the workface or weighting step, and the thickness of the waterresistant key strata on the breaking and instability of the water-resistant key strata were analysed.The results indicate that the water inrush from the floor can be predicted and prevented by controlling the initial or periodic weighting step with measures such as artificial forced caving, thus achieving safe mining conditions above confined aquifers. The findings provide an important theoretical basis for determining water inrush from the floor when mining above confined aquifers. | Sun Jian Hu Yang Zhao Guangming | 2017 | International Journal of Mining Science and Technology2017，27，5： | 2 |
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