[1]薛雅荣,宋大钊,何学秋,等.突出煤岩纵波波速与应力相关关系[J].西安科技大学学报,2019,(05):826-835.[doi:10.13800/j.cnki.xakjdxxb.2019.0512]
 XUE Ya-rong,SONG Da-zhao,HE Xue-qiu,et al.Correlation between longitudinal wave velocity and stress in outburst coal-rock[J].Journal of Xi’an University of Science and Technology,2019,(05):826-835.[doi:10.13800/j.cnki.xakjdxxb.2019.0512]
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2019年05期
页码:
826-835
栏目:
出版日期:
2019-10-25

文章信息/Info

Title:
Correlation between longitudinal wave velocity and stress in outburst coal-rock
文章编号:
1672-9315(2019)05-0826-10
作者:
薛雅荣1宋大钊1何学秋1李振雷1巩思园2赵英杰1
(1.北京科技大学 土木与资源工程学院,北京 100083; 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)
Author(s):
XUE Ya-rong1SONG Da-zhao1HE Xue-qiu1LI Zhen-lei1GONG Si-yuan2ZHAO Ying-jie1
关键词:
煤与瓦斯突出 突出煤岩 震动波波速 应力与波速相关关系 震动波速层析成像
Keywords:
coal and gas outburst outburst coal-rock shock wave velocity stress and wave velocity correlation mine tremor velocity tomography
分类号:
TD 324
DOI:
10.13800/j.cnki.xakjdxxb.2019.0512
文献标志码:
A
摘要:
为探究井下煤与瓦斯突出灾害的发生机理并实现监测预警,运用微机控制电液伺服岩石试验机对突出型煤试样进行单轴加载破坏实验,分析了试样破坏特征及力学特性,采集震动波信号,与实际结果拟合后得到波速与应力的耦合规律,并建立了波速与应力间的试验关系模型,利用矿震信号进行了突出煤层震动波层析成像现场试验验证。结果表明,在单轴加载条件下,纵波波速与突出煤样应力之间存在指数函数关系Vp=a+kerx,在加载初始阶段纵波波速变化梯度大,随后变化梯度逐渐减小并趋于线性,与实测值的相关系数计算结果表明模型相关度达0.883,能较准确描述波速与应力的变化关系。现场震动波层析成像得到的应力异常区域与现场采掘地质条件对应良好,验证了上述突出煤岩纵波波速与应力的正相关关系。震动波层析成像可应用于突出煤层应力集中区探测,对矿井突出危险区域预测具有重要的现实意义。
Abstract:
In order to explore the mechanism of coal and gas outburst disasters and to realize monitoring and early warning,the uniaxial compression failure test of the briquette coal samples was carried out by electro-hydraulic servo rock testing machine,and the failure characteristics and mechanical properties of the samples were analyzed.The P-wave generated during the experiment was collected to fit the actual shock wave,so as to discover the coupling law between wave velocity and stressand establish the experimental correlation model between them.Finally,the field test verification of mine tremor velocity tomography was conducted by the mine seismic signal.The results showed that under the condition of uniaxial compression,there was an exponential function relationship between P-wave velocity and stress Vp=a+kerx.At the initial stage of compression,the P-wave velocity changed greatly,and then the gradient gradually decreased and tended to linearity.The model correlation is 0.883,which could accurately describe the correlation between wave velocity and stress.The stress anomaly region obtained by mine tremor velocity tomography corresponded well with the on-site mining geological conditions,which verified the positive correlation between P-wave velocity and stress.Mine tremor velocity tomography can be applied to the exploration of stress concentration areas in coal seams,which has important practical significance for the prediction of mine dangerous areas.

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备注/Memo

备注/Memo:
收稿日期:2019-03-24 责任编辑:杨泉林基金项目:国家自然科学基金(51634001 51774023); 中央高校基本科研业务费(FRF-TP-18-007C1)通信作者:宋大钊(1985-),男,山东滨州人,博士,副教授,E-mail:song.dz@163.com
更新日期/Last Update: 2019-10-25