【摘要】：煤巖破裂伴隨氡析出特性變化,通過(guò)觀測(cè)煤、巖破裂過(guò)程氡析出規(guī)律有利于揭示煤巖動(dòng)力災(zāi)害機(jī)理及其前兆特征。論文利用自行設(shè)計(jì)的受載巖石破裂過(guò)程氡析出測(cè)量試驗(yàn)系統(tǒng),研究了煤巖單軸壓縮氡析出規(guī)律。結(jié)果表明,煤巖試樣單軸壓縮不同加載階段的氡析出特征具有顯著差異。試樣加載初期(孔隙/裂隙壓密階段),氡析出較原始狀態(tài)大幅增加;試樣加載中期(彈性變形階段),氡析出較加載初期明顯回落;試樣加載后期(塑性變形階段),氡析出較原始狀態(tài)進(jìn)一步增加;試樣破裂后,煤樣和巖樣的氡濃度較原始水平分別增加了約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.
【作者單位】： 河南理工大學(xué)河南省瓦斯地質(zhì)與瓦斯治理重點(diǎn)實(shí)驗(yàn)室省部共建國(guó)家重點(diǎn)實(shí)驗(yàn)室培育基地;河南理工大學(xué)安全科學(xué)與工程學(xué)院;煤炭安全生產(chǎn)河南省協(xié)同創(chuàng)新中心;
【基金】：教育部科學(xué)技術(shù)研究項(xiàng)目(213022A);教育部“創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃”項(xiàng)目(IRT_16R22) 河南省科技創(chuàng)新杰出青年項(xiàng)目(164100510013) 河南省瓦斯地質(zhì)與瓦斯治理重點(diǎn)實(shí)驗(yàn)室開放課題(WS2017B10)
【分類號(hào)】：TD71

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

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2 高志濱;樂(lè)仁昌;邵靜;何志杰;陳健O，

本文編號(hào)：2405375