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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.
After the collapse column is exposed and connected with groundwater, the permeation process of mudstone cementation layer is accompanied by mass loss, which is an evolving porous medium. Using self-developed broken-rock infiltration system, salt cementing with cement as cementing agent The influence of salt content, cement content and grading of rock particles on the permeability characteristics of variable-mass cemented and crushed rocks was analyzed.The results show that the dissolution of salt particles and the migration of rock particles together affect the effect of cemented and crushed rock Permeability and permeate flux change with time, and then increase and then decrease and eventually become stable. The more the salt content, the longer the seepage stability. The permeability is on the order of 10 ~ (-15) ~ 10 ~ (-13 ) m ~ 2. With the increase of cement content, the permeability of sample decreases monotonically. With the increase of Talbot power index n, permeability of sample increases monotonously with the same cement content. With the increase of Increasing the amount of salt, the permeability slowly increases after the first increase, 40g as the inflection point.