煤岩体应力动态监测系统开发及应用
发布时间：2018-10-26 06:41
【摘要】：煤岩体应力是矿井支护设计、矿压分析、冲击地压等煤岩动力灾害预测与防治的重要依据。为了定向测试煤岩体多向应力及其演化规律,自主研发了三向缸体压力感应器和煤岩体应力动态监测系统。感应器上设置的感应片可实现与煤岩体主动有效耦合,通过感应片伸缩变形和油压变化来反映煤岩体应力大小,进而通过该监测系统实现煤岩体应力多向、实时连续测量。将该系统应用于煤矿现场采动应力监测,分析了采场应力分布及演化规律。监测结果表明,多测点应力测量可反映巷道围岩应力分布及随采动等演化规律,可以确定巷道围岩卸压带范围、应力集中范围及应力集中程度等。实测分析得到了工作面巷道内帮煤体的三向正应力分布规律;各测点应力变化趋势基本一致,同一测点3个方向正应力并非完全同步;测试工作面巷旁存在2个应力峰值区及2个卸压带。该系统为定向监测煤岩体应力提供了有效手段和方法,可用于矿山应力监测分析、围岩稳定性监测分析、冲击地压等煤岩动力灾害监测预警等。
[Abstract]:The stress of coal and rock mass is an important basis for the prediction and prevention of coal and rock dynamic disasters such as mine support design, rock pressure analysis and impact ground pressure. In order to test the multidirectional stress and its evolution law of coal and rock mass, a three direction cylinder pressure sensor and a dynamic monitoring system of coal and rock mass stress are developed. The inductor set on the inductor can be effectively coupled with the active coupling of coal and rock mass. The stress of coal and rock mass can be reflected by the expansion deformation and oil pressure change of the inductor, and then the multi-directional and real-time continuous measurement of the stress of coal and rock mass can be realized by the monitoring system. The system is applied to the monitoring of mining stress in coal mine, and the stress distribution and evolution law of stope are analyzed. The monitoring results show that the multi-point stress measurement can reflect the evolution law of surrounding rock stress distribution and with mining, and can determine the range of pressure relief zone, the range of stress concentration and the degree of stress concentration of roadway surrounding rock. The three direction normal stress distribution law of coal seam in the roadway of working face is obtained, the stress change trend of each measuring point is basically the same, and the normal stress in three directions of the same measuring point is not completely synchronous. There are two peak stress areas and two relief zones beside roadway of test face. The system provides an effective means and method for directional monitoring of coal and rock mass stress, and can be used for monitoring and analysis of stress in mines, monitoring and analysis of stability of surrounding rock, monitoring and warning of coal and rock dynamic disasters such as rock burst and so on.
【作者单位】： 中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室;中国矿业大学煤炭资源与安全开采国家重点实验室;中国矿业大学安全工程学院;陕西煤业化工集团有限责任公司安全技术研究中心;北京科技大学土木与资源工程学院;
【基金】：“十三五”国家重点研发计划(2016YFC0801401) 国家自然科学基金资助项目(51574231) 中国矿业大学优秀创新团队(2014ZY001)~~
【分类号】：TD311
[Abstract]:The stress of coal and rock mass is an important basis for the prediction and prevention of coal and rock dynamic disasters such as mine support design, rock pressure analysis and impact ground pressure. In order to test the multidirectional stress and its evolution law of coal and rock mass, a three direction cylinder pressure sensor and a dynamic monitoring system of coal and rock mass stress are developed. The inductor set on the inductor can be effectively coupled with the active coupling of coal and rock mass. The stress of coal and rock mass can be reflected by the expansion deformation and oil pressure change of the inductor, and then the multi-directional and real-time continuous measurement of the stress of coal and rock mass can be realized by the monitoring system. The system is applied to the monitoring of mining stress in coal mine, and the stress distribution and evolution law of stope are analyzed. The monitoring results show that the multi-point stress measurement can reflect the evolution law of surrounding rock stress distribution and with mining, and can determine the range of pressure relief zone, the range of stress concentration and the degree of stress concentration of roadway surrounding rock. The three direction normal stress distribution law of coal seam in the roadway of working face is obtained, the stress change trend of each measuring point is basically the same, and the normal stress in three directions of the same measuring point is not completely synchronous. There are two peak stress areas and two relief zones beside roadway of test face. The system provides an effective means and method for directional monitoring of coal and rock mass stress, and can be used for monitoring and analysis of stress in mines, monitoring and analysis of stability of surrounding rock, monitoring and warning of coal and rock dynamic disasters such as rock burst and so on.
【作者单位】： 中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室;中国矿业大学煤炭资源与安全开采国家重点实验室;中国矿业大学安全工程学院;陕西煤业化工集团有限责任公司安全技术研究中心;北京科技大学土木与资源工程学院;
【基金】：“十三五”国家重点研发计划(2016YFC0801401) 国家自然科学基金资助项目(51574231) 中国矿业大学优秀创新团队(2014ZY001)~~
【分类号】：TD311
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