水-岩作用下煤矸石声速时变特性及影响因素分析  

Correlation Analysis of Time-varying Characteristics and Influencing Factors of Sound Velocity of Coal Gangue under Water-rock Interaction

作　　者：尚可欣 李顺才[1,2] 张农 贾星雨 SHANG Kexin;LI Shuncai;ZHANG Nong;JIA Xingyu(School of China-Russia,Jiangsu Normal University,Xuzhou 221116,Jiangsu,China;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)

机构地区：[1]江苏师范大学中俄学院,江苏徐州221116 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《实验室研究与探索》2022年第12期23-26,44,共5页Research and Exploration In Laboratory

基　　金：国家自然科学基金重点项目(52034007);国家级大学生实践创新训练计划项目(202110320013Z);中国矿业大学煤炭资源与安全开采国家重点实验室开放基金项目(SKLCRSM19KF013)。

摘　　要：为了研究水-岩作用对煤矸石声速时变特性的影响,选取的煤矸石试样在不同pH值溶液中浸泡数天,然后利用声发射仪断铅法测试浸泡后试样的声速,得到了煤矸石质量、密度、声速及溶液中钙离子、镁离子浓度、pH值的时变规律。通过灰色相关性理论分析煤矸石声速与水、岩影响因素的关联度,并通过Mintab响应面软件建立了煤矸石声速关于多因素的预测模型。研究表明:(1)初始pH值对溶液中钙离子、镁离子浓度的变化影响显著,酸性溶液中钙、镁离子浓度最高;(2)在浸泡中期煤矸石声速值比浸泡初期有较大幅度提高;(3)中性溶液中浸泡过的矸石质量变化比最高。(4)声速与溶液中钙、镁离子浓度、矸石密度及浸泡时间有较明显的相关性。In order to study the effect of water-rock interaction on acoustic velocity of coal gangue,coal gangue samples were selected and soaked in solutions with different pH values for several days,the acoustic velocity of the soaked samples were measured by the lead breaking method of acoustic emission instrument,and then the time-varying laws of coal gangue quality,density,sound velocity,calcium and magnesium ion concentration and pH in the solution were obtained A multivariate prediction model of acoustic velocity of coal gangue was established by Mintab response surface software.The results show the following results.The initial pH value has a significant effect on the volume concentration of calcium and magnesium ions in the solution,and the concentration of calcium and magnesium ions in acidic solution is the highest.The sound velocity of coal gangue in the middle period of soaking is significantly higher than that in the early stage of soaking The mass change ratio of gangue soaked in neutral solution is the highest.It can be concluded that the sound velocity has obvious correlation with the concentration of calcium and magnesium ions in the solution,the density of gangue and soaking time.

关 键 词：水-岩耦合作用 煤矸石 声速 时变规律 灰色关联度 

分 类 号：TD315[矿业工程—矿井建设]