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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%。
The rupture of coal and rock is accompanied by the variation of radon precipitation characteristics. By observing the regularities of radon precipitation during coal and rock rupture, it is helpful to reveal the dynamic mechanism of coal and rock disasters and their precursory features. In this paper, the self-designed radon precipitation measuring and testing system for the rock under load is used to study the regularity of radon precipitation in uniaxial compression of coal and rock. The results show that there are significant differences between radon precipitation characteristics of uniaxial compression of coal and rock samples during different loading stages. In the early stage of loading (pore / fissure compaction stage), radon deposition increased greatly compared with the original state; in the mid-stage of loading (elastic deformation stage), radon deposition decreased obviously compared with the initial stage of loading; The precipitation increased further compared with the original state. After the rupture of the sample, the radon concentration in the coal sample and the rock sample increased by about 91% and 83% respectively compared with the original level.