摘要
针对巷道掘进面前方含水构造(干燥无水、无压水、承压水)难以判别的问题,通过开展不同含水条件下粉砂岩双轴加载试验,利用红外热像仪对岩石破裂过程进行监测,分析巷道受压过程破裂演化规律及温度场时空演化特征。结果表明:不同含水条件下的岩石破裂过程大致分为4个阶段,且加载过程岩石表面平均红外温度均随着载荷呈线性增加;若岩石破裂前兆为突然增温型,则表明破裂面前方无水;若岩石破裂前兆为突降转升型,则表明破裂面前方存在水体,且水压越大,温度曲线由升转降的时间越早,低温现象越明显。研究结果可为实际工程巷道开挖过程中突水事故的遥感监测及预防提供参考依据。
In order to distinguish the water condition(dry,unconfined water and confined water)in front of the roadway heading face,the experiments of different conditions of siltstone by biaxial loading were conducted.Thermal infrared was used to monitor the steady failure process.The evolution rules of the roadway and the spatiotemporal evolution characteristics were analyzed.The results showed that:The rock failure with different water cut could be divided four stages,and all of the average infrared temperatures of rock surface increased linearly with loading in the process;If the precursor of rock fracture was suddenly up,then it was dry in front of fracture plane;If the precursor of rock fracture was suddenly down and then turned to rise,then there was water in front of fracture plane,and the greater pressure could make the decreasing of the temperature curve go down prior,and the low temperature of infrared image would be more obviously.The results could provide a reference for remote sensing monitoring and prevention of water inrush accidents in the excavation of roadway.
作者
任瑞峰
梁鹏
孙林
田宝柱
姚旭龙
刘祥鑫
REN Ruifeng;LIANG Peng;SUN Lin;TIAN Baozhu;YAO Xulong;LIU Xiangxin(College of Mining Engineering,North China University of Science and Technology,Tangshan 063009,Hebei,China;Hebei Province Key Laboratory of Mining Development and Safety Technology,North China University of Science and Technology,Tangshan 063009,Hebei,China)
出处
《河南理工大学学报（自然科学版）》
CAS
北大核心
2021年第3期18-25,共8页
Journal of Henan Polytechnic University（Natural Science）
基金
国家自然科学基金资助项目(51574102)
河北省自然科学基金资助项目(E2017209241)
河北省高校百名优秀创新人才支持计划项目(SLRC2017050)。
关键词
含水条件
巷道掘进面
红外辐射
温度场
时空演化特征
破裂前兆
water cut condition
roadway heading face
infrared radiation
temperature field
spatiotemporal evolution characteristic
fracture precursor
