本文選題：紅外輻射 + 應力�。� 參考：《煤炭學報》2017年01期

【摘要】：煤巖破裂是引發(fā)突水與煤柱失穩(wěn)等礦山災害的根本原因,準確有效地對煤巖受力破裂過程(裂隙發(fā)育過程)進行監(jiān)測預警,是實現(xiàn)礦山保水開采和巖層控制的重要基礎。煤巖在受力破裂過程中,伴隨著應力調(diào)整會發(fā)生紅外輻射變化,為探索應力變化與紅外輻射變化之間的量化關系,提出煤樣表面紅外輻射方差突變系數(shù)新指標,進行煤單軸加載紅外輻射觀測實驗研究。研究結果表明,應力對單軸加載煤樣的紅外輻射普遍具有控制效應,50 mm×50 mm×50 mm煤樣表現(xiàn)出控制效應的比例約為93%;50 mm×50 mm×100 mm煤樣表現(xiàn)出控制效應的比例約為85%。在紅外輻射試驗中,煤樣表面紅外輻射方差突變系數(shù)平均達到煤樣應力調(diào)整系數(shù)的2個數(shù)量級,可運用此特征對承載煤巖體裂隙發(fā)育及破裂狀況進行紅外實時監(jiān)測。同時,應力對紅外射的控制效應具有時間滯后性,50 mm×50 mm×50 mm煤樣的紅外輻射方差突變平均滯后其應力調(diào)整時刻約2.7 s,50 mm×50 mm×100 mm煤樣的紅外輻射方差突變平均滯后其應力調(diào)整時刻約2.9 s。
[Abstract]:Coal and rock fracture is the fundamental cause of mine disasters such as water inrush and pillar instability. Monitoring and warning accurately and effectively the fracture process (fracture development process) of coal and rock is an important foundation for water conservation mining and strata control. In order to explore the quantitative relationship between the stress change and the infrared radiation change, a new index of variance mutation coefficient of infrared radiation on coal surface is put forward in order to explore the quantitative relationship between the stress change and infrared radiation change. The experimental study of infrared radiation observation under uniaxial loading of coal was carried out. The results show that the stress has a control effect on the infrared radiation of uniaxial loading coal samples generally. The proportion of 50 mm 脳 50 mm coal samples showing control effect is about 93mm 脳 50 mm 脳 100 mm coal samples. The proportion of controlling effect of 50 mm 脳 50 mm 脳 100 mm coal samples is about 85%. In the infrared radiation test, the coefficient of variance mutation of infrared radiation on coal surface is equal to two orders of magnitude of the coefficient of stress adjustment of coal sample, which can be used to monitor the fracture development and fracture state of bearing coal and rock mass in real time. meanwhile The control effect of stress on infrared radiation has the time-lag effect of 50 mm 脳 50 mm of coal samples. The mutation of infrared radiation variance lags behind the mean time of 2.7 s-1 50 mm 脳 50 mm 脳 100 mm of coal samples and the mean time of stress adjustment of the variation of infrared radiation variance of 50 mm 脳 50 mm 脳 100 mm coal samples is about 2.9 s.
【作者單位】： 中國礦業(yè)大學礦業(yè)工程學院;中國礦業(yè)大學深部煤炭資源開采教育部重點實驗室;College
【基金】：國家重點基礎研究發(fā)展計劃(973)資助項目(2015CB251600) 江蘇高校優(yōu)勢學科建設工程資助項目(PAPD)
【分類號】：TD315

【參考文獻】

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