| 柔性钻孔应力计设计及实验应用研究 |
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| 引用本文： | 夏方迁,魏全德,郭延淼,张立明.柔性钻孔应力计设计及实验应用研究[J].煤炭工程,2020,52(4):161-165. |
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| 作者姓名： | 夏方迁 魏全德 郭延淼 张立明 |
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| 作者单位： | 1. 中国矿业大学（北京）;2. 北京安科兴业科技股份有限公司;3. 北京安科兴业矿山安全技术研究院有限公司;4. 北京科技大学; |
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| 摘 要： | 针对钻孔应力计监测方向单一、耦合性差的问题,设计了一种新型柔性应力计,并通过力学建模分析了其工作原理。对新型应力计的线性度、灵敏度、耐久性、温度特性等进行了实验室测试,结果表明:①柔性钻孔应力计具有较好的线性度,应力计的灵敏度约0.29;②应力计的长期稳定性较高,初压稳定期约2.5~3d;③柔性钻孔应力计受温度变化影响明显,在温度变化较小的条件下使用,可以保证监测效果,若在温度变化较大的条件下使用,需通过环境温度监测进行数据修正。经现场实践,柔性钻孔应力计与充液膨胀枕式应力计相比,监测精度有所提高。
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| 关 键 词： | 柔性钻孔应力计 应力监测 线性度 灵敏度 |
| 收稿时间： | 2019-09-12 |
| 修稿时间： | 2019-12-09 |
Design,Experiment and Application of Flexible Borehole Stressmeter |
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| XIA Fang-qian,WEI Quan-de,GUO Yan-miao,ZHANG Li-ming.Design,Experiment and Application of Flexible Borehole Stressmeter[J].Coal Engineering,2020,52(4):161-165. |
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| Authors: | XIA Fang-qian WEI Quan-de GUO Yan-miao ZHANG Li-ming |
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| Affiliation: | (School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Beijing Anke Xingye Science and Technology Company Limited,Beijing 100083,China;Beijing Anke Xingye Research Institute Company Limited of Mine Safety Technology,Beijing 102299,China) |
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| Abstract: | Aiming at the problems of single monitoring direction and poor coupling of borehole stressmeter, a new type of flexible stressmeter is designed, and its working principle is analyzed through mechanical modeling. The linearity, sensitivity, durability and temperature characteristics of the new stressmeter are tested in laboratory. The experimental data show that:① the flexible borehole stressmeter has good linearity, and the sensitivity of the stress gauge is about 0.29;② the long-term stability of the stressmeter is high, and the initial pressure stability period is about 2.5d-3d; ③ the flexible borehole stressmeter is significantly affected by the temperature change, and is more suitable for the stress monitoring of deep coal body with little temperature change, if carried out. Temperature effect should be considered in shallow coal or geotechnical engineering monitoring. Through field practice, the monitoring accuracy of the flexible borehole stressmeter is improved compared with the ordinary borehole stressmeter. |
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| Keywords: | flexible borehole stress meter stress monitoring sensitivity linearity |
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