基于红外辐射时空演化的巷道岩爆实时预警方法实验研究  

Experimental study on real-time early warning method of tunnel rock burst based on infrared radiation spatial and temporal evolutions

作　　者：张艳博 杨震[1,2] 姚旭龙 梁鹏[1,2] 田宝柱 孙林[1,2] ZHANG Yanbo1＇2, YANG Zhen1,2, YAO Xulong1＇2, LIANG Peng1＇2, TIAN Baozhu1＇2, SUN Lin1＇2(1. College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei 063009, China~ 2. Mining Development and Technology Safety Key Laboratory of Hebei Province, Tangshan, Hebei 063009, Chin)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063009 [2]河北省矿业开发与安全技术重点实验室,河北唐山063009

出　　处：《采矿与安全工程学报》2018年第2期299-307,共9页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51374088;51574102);华北理工大学青年基金项目(Z201315;Z201501)

摘　　要：开展花岗岩巷道岩爆模拟实验,利用红外热像仪监测巷道岩爆全过程。分析岩爆过程中红外热像空间演化过程,引入统计学中方差理论,定量刻画岩爆过程温度场的时序演化特征。在此基础上,采用有限差分法,实时获取红外热像温度场分异速率,应用区间估计理论提取岩爆预警特征信号,建立岩爆实时预警方法。研究结果表明,岩爆过程和红外辐射时空演化存在对应关系:岩爆孕育阶段,红外温度场全局低温,无分异现象;颗粒弹射期,温度场开始出现高温集中,高、低温区域点状交替分布,温度场开始出现分异;片状剥离伴随颗粒混合弹射期,片状高温区域出现,随后高温区域短暂降温、扩散,分异程度急速上升后短暂下降;岩爆发生时,温度场内高温区域消失,分异程度骤降。基于温度场时序演化特征的量化研究,采用有限差分法实时获取温度场分异速率,将温度场稳定分异阶段分异速率数学期望置信度为0.99的置信区间上、下限设定为阈值,进行岩爆预警特征信号提取,将岩爆预警特征信号的第1次出现作为预警系统触发信号,建立基于红外时空演化的实时预警方法,为矿山灾害预警系统的建立提供理论指导。This paper develops the granite tunnel rock burst simulation test by using infrared thermog- raphy system to monitor the whole process of the tunnel rock burst and analyzing the spatial evolution of infrared thermal image in the process of rock burst. Using the theory of variance to quantitative, the change of temperature field with time is studied. Based on that, the real-time warning method for rock burst is established with using the finite difference method and acquiring real-time temperature field differentiation rate and using interval estimation theory to extract the characteristic signal of rock burst prediction. The results show that it exists corresponding relationship between the process of rock burst and infrared radiation spatial and temporal evolutions： Temperature field is overall situation low tem- perature and there is no differentiation phenomenon in the rock burst embryonic stage. During the peri- od of rock particles ejection, the high temperature region began to appear, the low and high temperature points alternately distribute in the temperature field and the temperature field began to be different. In the rock stripping and particle ejection period, the flake high temperature region appears, then the high temperature region cool and spreads in a short period of time, the degree of differentiation is rapidly de- cline after a brief rising. When rock burst occurred, the high temperature region disappeared, the degree of differentiation undergoes a rapid decline. Based on the quantitative researches on the characteristics of infrared radiation spatial and temporal evolutions, By using the finite difference method, the real-time temperature field differentiation rate is acquired with the 0.99 confidence level, the upper bound and lower bound of credibility interval of mathematical expectation of differentiation rate is set as a thresh- old value in the stabilization stages of differentiation of temperature field. The first occurrence charac- teristic signal of rock burst is used as the trigge

关 键 词：岩爆 红外辐射 时空演化 实时预警 

分 类 号：TD353[矿业工程—矿井建设]