变质量胶结破碎岩石非Darcy流渗透特性试验研究

发布时间：2018-04-14 18:06

本文选题：陷落柱 + 演变多孔介质　；参考：《中国矿业大学学报》2017年02期

【摘要】：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.
[Abstract]:The permeation process of mudstone cementation layer is accompanied by mass loss, and it is a kind of evolving porous medium after the collapse column is exposed and conducted with groundwater.In this paper, the permeation test of salt cemented broken rock with cement as cementing agent was carried out, and the salt content was analyzed by using the permeation system of broken rock developed by ourselves.The influence of cement content and rock particle gradation on the permeability of cemented rock with variable mass.The results show that the dissolution of salt particles and the migration of rock particles affect the permeability of cemented broken rock, and the permeability flow rate changes with time, first rises and then decreases and finally tends to stabilize, and the more salt content, the longer the seepage stability duration.The permeability of the sample decreases monotonously with the increase of cement content, the permeability monotonously increases with the increase of Talbot exponent n, and increases with the increase of salt content with the increase of Talbot power exponent.The inflexion point of permeation was 40 g.
【作者单位】：中国矿业大学深部岩土力学与地下工程国家重点实验室;常州工程职业技术学院建筑工程学院;盐城工学院土木学院;
【基金】：国家重点基础研究发展计划(973)项目(2013CB227900) 国家自然科学基金项目(11502229,51404266)
【分类号】：TD315

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