单轴压缩下含杂质盐岩的声发射特征试验研究（岩土会议）

中文摘要: 针对中国能源地下储库盐岩高杂质的问题，基于水不溶物含量及类型将取自某拟建储库的盐岩试样加工后分为纯盐岩组（纯盐岩）、含泥岩杂质盐岩组（泥质盐岩和盐质泥岩）、含钙芒硝岩杂质盐岩组（钙芒硝质盐岩和钙芒硝岩），然后开展了单轴压缩破坏全过程的声发射测试试验。通过试验研究，得到了以下结果：（1）泥岩杂质和钙芒硝岩杂质均能提高盐岩的抗压强度，减小其变形能力，钙芒硝岩杂质使得盐岩屈服阶段大幅度减小；（2）随着泥岩杂质含量的增加，振铃计数率活跃区会后移，能量率大值集中区向后推移，累计振铃计数曲线和累计能量曲线呈现出由上凸到下凹的变化过程；（3）随着钙芒硝岩杂质的增加，振铃计数率最大值出现时间是向后推移的，整个试验过程中振铃计数率和能量率相对不稳定，累计能量-应变曲线台阶状增长更明显。
Abstract:According to the characteristics of salt rocks of Chinese energy underground storage which is high impurity uniaxial experiments were carried out on the pure salt rocks, argillaceous salt rock, halopelite, glauberite salt rock and glauberite rock . All of these specimens were taken from a proposed salt rocks reservoir, and then were divided by the impurity content and type . Through experimental study, the following results were obtained: (1) both the mudstone impurity and glauberite rock impurity can increase the compressive strength of pure rock salt and reduce its deformability, glauberite rock impurity has more influence on rock salt than the mudstone impurity;(2) with the increase of mudstone impurities, the active area of AE counts is postponed, high energy rate is over backwards, cumulative AE counts curve and the accumulative energy curve presented by the changing process from convex to concave;(3) with the increase of glauberite rock impurities , the time when the maximum AE count appeared was backwards , the AE counts and energy rate was relatively stable through the whole test , the accumulative energy - strain curve step growth more obviously.