基于水岩作用的深部煤层底板泥岩的微观差异性特征研究

Research of Microscopic Difference of Deep Coal Seam Floor Mudstone Based on Water- rock Interaction

为了探究深部煤层底板泥岩在不同溶液中水岩作用的规律和特征,以永煤城郊煤矿深部底板泥岩为研究对象,分别在蒸馏水、自来水和矿井水中进行了浸泡与电导率测试;在此基础上,通过崩解、荧光、X光衍射和扫描电镜等实验进行了该类型泥岩在不同溶液水岩作用前后差异性对比分析。研究结果表明:不同溶液中泥岩电导率变化是不同的,且干-湿过程对水岩作用有明显的促进作用;该泥岩主要成分为石英、云母、绿泥石,耐崩解性强;不同溶液浸泡对泥岩的微观结构的影响是不同的:矿化度高的矿井水浸泡后的泥岩微观结构最为松散,自来水次之,蒸馏水影响最小。

In order to research the laws and characteristics of water- rock interaction of deep mudstone in different solution,we took the deep floor of Yongcheng Coal Mine as the research object,and put them into distilled water,tap water and mine water,and conductivity test were measured at the same time; on the basic of that,we analyzed the difference of water- rock interactions of this mudstone in different solution by means of disintegration,fluorescence,X ray diffraction and SEM,etc. The results show that： the change of electrical conductivity in different solution is different,and dry- wet process has a significant effect on the water rock interaction;the mudstone is mainly composed of quartz,mica,chlorite and it is hard to be disintegrated; the influence of mudstones soaked in different solution on the microstructure of mudstone is different; the mine water with high degree of mineralization made the micro structure of mudstone the most loose,then the tap water,and the influence of distilled water is the smallest.