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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℃.
The Ф10mm hole was drilled inside the coal and rock body, and the temperature inside the hole was measured by infrared thermometer for the first time to obtain the internal temperature variation characteristics.The coal and mudstone specimens were subjected to uniaxial loading infrared observation test, and analyzed The temporal and spatial evolution characteristics of infrared radiation temperature during compression show that internal temperature of coal is positively correlated with time and load.The onset of rupture in coal samples is sudden warming and the temperature of infrared radiation changes from low or steady state to high- Suddenly, the rate of temperature rise suddenly changes, and the temperature suddenly increases up to 0.10 ° C. Mudstone is generally in the form of temperature increase, and the temperature and stress and strain of the infrared radiation in the mudstone hole are heated to be linearly fitted to obtain the temperature, stress and strain of the infrared radiation in the hole The linear correlation coefficients are all greater than 0.92. The rupture precursors in mudstone are sudden warming type with the highest sudden increase of 0.23 ℃.