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利用煤岩电磁辐射采集系统和红外测温仪,试验研究由顶板岩、煤层、底板岩组成的复合煤岩体受载破裂的电磁辐射信号及煤层内部的红外辐射温度。对复合煤岩体内部进行钻孔,利用红外测温仪研究试样内部红外辐射温度的演化特征,采用环形天线测量电磁辐射信号强度。结果表明:煤岩内部微观裂隙和宏观破裂均对电磁辐射及红外辐射信号产生明显影响,且其影响程度随载荷增强而逐渐增强;红外辐射主要来源于摩擦热效应与热弹效应,呈温阶跃式、突增型上升。两者呈现较强的相关性,决定系数均在0.8以上。
By using coal-rock electromagnetic radiation acquisition system and infrared thermometer, the electromagnetic radiation signals of composite rock mass composed of roof rock, coal seam and floor rock are experimentally studied and the infrared radiation temperature inside the coal seam is studied. The interior of the composite coal and rock body is drilled. The infrared thermometer is used to study the evolution of the infrared radiation temperature inside the specimen. The annular antenna is used to measure the signal intensity of the electromagnetic radiation. The results show that the micro-cracks and macroscopic ruptures in coal and rock have a significant effect on the electromagnetic radiation and the infrared radiation signals, and the degree of influence is gradually enhanced with the increase of the load. The infrared radiation mainly comes from the frictional heat effect and the thermoelastic effect, Suddenly increased. The two showed a strong correlation, the decision coefficients are above 0.8.