煤岩单轴压缩氡析出特性试验研究

发布时间：2019-01-09 08:28

【摘要】：煤岩破裂伴随氡析出特性变化,通过观测煤、岩破裂过程氡析出规律有利于揭示煤岩动力灾害机理及其前兆特征。论文利用自行设计的受载岩石破裂过程氡析出测量试验系统,研究了煤岩单轴压缩氡析出规律。结果表明,煤岩试样单轴压缩不同加载阶段的氡析出特征具有显著差异。试样加载初期(孔隙/裂隙压密阶段),氡析出较原始状态大幅增加;试样加载中期(弹性变形阶段),氡析出较加载初期明显回落;试样加载后期(塑性变形阶段),氡析出较原始状态进一步增加;试样破裂后,煤样和岩样的氡浓度较原始水平分别增加了约91%和83%。
[Abstract]:The radon exhalation characteristics of coal and rock are changed with the rupture of coal and rock. It is helpful to reveal the mechanism of coal and rock dynamic disaster and its precursor characteristics by observing the law of radon exhalation during coal and rock rupture. In this paper, the rule of radon emission from coal and rock under uniaxial compression is studied by using a self-designed experimental system for measuring radon exhalation during fracture process of loaded rock. The results show that there are significant differences in radon emission characteristics between different loading stages of uniaxial compression of coal and rock samples. At the early stage of specimen loading (pore / fissure compaction stage), radon exhalation increased significantly compared with the original state, and in the middle stage of specimen loading (elastic deformation stage), the radon exhalation decreased obviously compared with the initial loading stage. At the later stage of loading (plastic deformation stage), the radon exhalation increased further than the original state, and the radon concentration of coal and rock samples increased by 91% and 83%, respectively, compared with the original level after the specimen rupture.
【作者单位】：河南理工大学河南省瓦斯地质与瓦斯治理重点实验室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】：教育部科学技术研究项目(213022A);教育部“创新团队发展计划”项目(IRT_16R22) 河南省科技创新杰出青年项目(164100510013) 河南省瓦斯地质与瓦斯治理重点实验室开放课题(WS2017B10)
【分类号】：TD71

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