doi:10.16186/j.cnki.1673-9787.2019110051

Received:2019/11/13

Revised:2020/01/03

Published:2021/05/15

Experimental study on infrared radiation characteristics of roadway heading facefracture under different water cut conditions

REN Ruifeng1,2, LIANG Peng1,2, SUN Lin1,2, TIAN Baozhu1,2, YAO Xulong1,2, LIU Xiangxin1,2

1.College of Mining Engineering， North China University of Science and Technology， Tangshan  063009 ，Hebei， China;2.Hebei Province Key Laboratory of Mining Development and Safety Technology， North China University of Science and Technology， Tangshan  063009 ， Hebei， China

Abstract: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.

Key words:water cut condition;roadway heading face;infrared radiation;temperature field;spatiotemporal evolution characteristic;fracture precursor

 不同含水条件下巷道掘进面破裂红外辐射特征试验研究_任瑞峰.pdf