煤岩受压过程中内部红外辐射温度变化特征研究  

Variation characteristics of internal infrared radiation temperature of coal-rock mass in compression process

作　　者：马立强[1] 李奇奇[1,2] 曹新奇[1] 周焘[1] 

机构地区：[1]中国矿业大学矿业工程学院深部煤炭资源开采教育部重点实验室煤炭资源与安全开采国家重点实验室,江苏徐州221116 [2]新疆天池能源有限责任公司,新疆昌吉831100

出　　处：《中国矿业大学学报》2013年第3期331-336,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50904063;51004101);江苏省优势学科项目(SZBF2011-6-B35);国家高技术研究发展计划(863)项目(2012AA062101)

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℃.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 ℃.

关 键 词：岩石力学 红外辐射温度 煤岩体 破裂前兆 

分 类 号：TD315[矿业工程—矿井建设]