基于层理影响的煤样加载过程声发射差异性分析
发布时间：2018-10-21 10:55
【摘要】：为了探究层理对煤矿开采过程中煤岩声发射特征的影响,在寺河矿采集煤样,根据煤样制作要求,分别沿轴向垂直层理方向和平行层理方向加工煤样。利用RMT-150B岩石力学实验系统和CDAE-1全数字化声发射检测及分析系统,对煤样加载过程中的应力 应变、声发射特征进行测试分析。测试结果显示:轴向垂直层理煤样不仅具有较高的岩石力学强度和声发射强度,而且声发射特征具有较强的突变性和滞后性。声发射特征的差异性体现了在加载过程中,轴向垂直层理煤样以整体变形、破坏为主,轴向平行层理煤样以局部变形、破坏为主,这为煤矿井下动力灾害的监测、预报提供了指导。
[Abstract]:In order to explore the influence of stratification on the characteristics of acoustic emission of coal and rock in coal mining process, coal samples were collected in Sihe Coal Mine and processed along the direction of axial vertical stratification and parallel stratification, respectively, according to the requirements of coal sample making. Using RMT-150B rock mechanics experimental system and CDAE-1 full digital acoustic emission detection and analysis system, the stress and strain and acoustic emission characteristics of coal samples during loading are tested and analyzed. The test results show that the axial vertical stratified coal samples not only have high rock mechanical strength and acoustic emission intensity, but also have strong mutation and lag characteristics. The difference of acoustic emission characteristics shows that in the loading process, the axial vertical stratified coal samples are mainly deformed and destroyed, while the axial parallel bedding coal samples are local deformation and destruction, which is the monitoring of underground dynamic disasters. The forecast provides guidance.
【作者单位】： 河南省瓦斯地质与瓦斯治理省部共建国家重点实验室培育基地;河南理工大学安全科学与工程学院;煤炭安全生产河南省协同创新中心;
【基金】：国家自然科学基金项目(51574112;51404100) 教育部科学技术研究重点项目(213022A)~~
【分类号】：TD313
本文编号：2284890
[Abstract]:In order to explore the influence of stratification on the characteristics of acoustic emission of coal and rock in coal mining process, coal samples were collected in Sihe Coal Mine and processed along the direction of axial vertical stratification and parallel stratification, respectively, according to the requirements of coal sample making. Using RMT-150B rock mechanics experimental system and CDAE-1 full digital acoustic emission detection and analysis system, the stress and strain and acoustic emission characteristics of coal samples during loading are tested and analyzed. The test results show that the axial vertical stratified coal samples not only have high rock mechanical strength and acoustic emission intensity, but also have strong mutation and lag characteristics. The difference of acoustic emission characteristics shows that in the loading process, the axial vertical stratified coal samples are mainly deformed and destroyed, while the axial parallel bedding coal samples are local deformation and destruction, which is the monitoring of underground dynamic disasters. The forecast provides guidance.
【作者单位】： 河南省瓦斯地质与瓦斯治理省部共建国家重点实验室培育基地;河南理工大学安全科学与工程学院;煤炭安全生产河南省协同创新中心;
【基金】：国家自然科学基金项目(51574112;51404100) 教育部科学技术研究重点项目(213022A)~~
【分类号】：TD313
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1 贾炳;倪小明;苏承东;;煤样加载过程声发射响应特征试验研究[J];煤炭科学技术;2014年07期
，本文编号：2284890
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