【摘要】 在煤岩体内部钻Ф10mm的孔,首次利用红外测温仪实时测量煤岩体孔内的温度来得到其内部的温度变化特征.对煤和泥岩试件进行单轴加载红外观测试验,分析其受压过程中红外辐射温度的时空演化特征,发现煤内部温度与时间、载荷都是正相关的.煤样中出现破裂前兆是突然升温型,红外辐射温度由低速上升或者平稳状态转为高速上升,温度上升速度突然发生转折,温度突增最高达0.10℃.泥岩总体上都是升温形式,将升温泥岩孔内红外辐射温度与应力、应变线性拟合,得到孔内红外辐射温度与应力、应变的线性相关系数均大于0.92.泥岩中出现破裂前兆是突然升温型,最高突增0.23℃.更多还原

【Abstract】 To study the variation characteristics of internal temperature of coal-rock mass in the compression process,we drilled a hole of Ф10 mm in coal-rock mass and measured the real-time temperature of the hole by the infrared thermometer.Infrared observation experiment of coal and mudstone under uniaxial loading was carried out in this study,and temporal and spatial evolution rule of infrared radiation temperature were also analyzed.The results show that the internal temperature of coal has a positive relationship with time and load.The sign of fracture appears in the coal samples,that is,temperature suddenly rises.Infrared radiation temperature shows a change from low-speed increase or stable state to high-speed increase,and increase speed of temperature suddenly changes,with a maximum increase of 0.10 ℃.On the whole,the mudstone shows an increase.Linear fitting the infrared radiation temperature,stress and strain in the hole of temperature-rising mudstone concludes that linear correlation coefficients of above three factors are all greater than 0.92.The sign of failure appears in mudstone,that is,temperature suddenly rises,with a maximum increment of 0.23 ℃.更多还原