胶结破碎泥岩渗透性试验研究

发布时间：2018-05-09 00:03

本文选题：陷落柱 + 胶结　；参考：《采矿与安全工程学报》2015年05期

【摘要】：在水流的溶蚀、磨蚀和冲蚀作用下,陷落柱内部胶结结构发生破坏并伴有质量流失,当水流作用持续到一定时间,渗流将发生失稳。为了揭示陷落柱的突水机理,利用自主研制的渗透试样压制装置和破碎岩石渗透试验系统进行了胶结破碎泥岩渗透试验,分析了胶结物质、渗透压力、破碎泥岩粒径分布和初始孔隙度对胶结破碎泥岩渗透性的影响。研究表明:1)随着胶结强度的增大,渗流失稳历时变长;采用水泥做胶结剂时,试样中渗透流量趋于稳定,不发生失稳。2)失稳历时随渗透压力按指数函数减小。3)随着Talbol幂指数的增大,试样中大颗粒增多,阻隔水能力增强。4)随着初始孔隙度的增大,试样渗透性增强,渗流失稳历时随初始孔隙度按指数函数减小。
[Abstract]:Under the action of water erosion, erosion and erosion, the internal cementation structure of the collapse column is destroyed and the mass is lost. When the flow action lasts for a certain time, the seepage will be unstable. In order to reveal the water inrush mechanism of the collapse column, the penetration test of cemented broken mudstone was carried out by using the self-developed penetration sample pressing device and the broken rock permeation test system, and the cementation material and osmotic pressure were analyzed. Effects of particle size distribution and initial porosity on permeability of cemented fractured mudstone. The results show that the percolation instability duration becomes longer with the increase of cementing strength, and when cement is used as cementing agent, the permeation flow rate in the sample tends to be stable. With the increase of Talbol power exponent, the large particles in the sample increase and the water barrier ability increases. 4) with the increase of the initial porosity, the permeability of the sample increases, and the permeability of the sample increases with the increase of the initial porosity, and the permeability of the sample increases with the increase of the initial porosity. The percolation instability duration decreases with the initial porosity as an exponential function.
【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;中国矿业大学力学与建筑工程学院;
【基金】：国家重点基础研究发展计划(973)项目(2013CB227900) 江苏省2014年度普通高校研究生科研创新计划项目(KYLX_1370) 国家自然科学基金项目(51404266)
【分类号】：TD745

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