王台铺煤矿旺格维利采煤法红外辐射物理相似模拟实验研究

发布时间：2018-06-07 07:08

  本文选题：旺格维利充填采煤法 + 红外辐射　； 参考：《中国矿业大学》2015年硕士论文

【摘要】：本文通过相似模拟旺格维利充填采煤法来研究短壁工作面开采过程中红外辐射温度的变化规律,采用FLAC3D大型三维数值计算软件对旺格维利充填采煤法采场巷道围岩应力应变规律进行数值模拟计算,在红外辐射热像图中寻找红外辐射温度变化异常区,并对红外辐射温度变化异常区内平均红外辐射温度进行定量分析,实验结果对旺格维利充填采煤法矿压控制具有一定的指导意义。在红外辐射温度实验中,外界干扰因素对实验结果影响较大,并且由于外界干扰因素的不可逆性、复杂性及随机性,通过理论计算其红外辐射不可行,以往的去噪方法均未分离去除外界因素的干扰,本文提出参照区域去噪法,基于在内部因素基本稳定的情况下,物体表面平均红外辐射温度基本稳定变化相对较小的原则,通过参照区域平均红外辐射温度曲线去除所有外界影响因素的红外辐射,从而得出较为真实的物体表面平均红外辐射温度,并且本文提出相关系数作为参照区域选择的评价标准。本文分析了不同阶段采场巷道红外辐射热像图的变化特征,及采场巷道开挖影响范围内平均红外辐射温度的变化特征,主要研究成果如下:(1)通过分析不同阶段采场巷道红外辐射热像图的变化特征,可以明显看出监测区域内采场巷道周围的温度异常区,及温度异常区红外辐射温度变化规律和温度异常区的范围。(2)所有采场巷道开挖之前,经参照区域去噪法去噪,平均红外辐射温度波动较小,平均红外辐射温度变化曲线基本稳定,振幅在0.10℃范围之内。(3)不同阶段采场巷道开挖后影响范围内平均红外辐射温度的变化,有升有降,无规律可循。但是受开挖扰动的影响,四个阶段采场巷道开挖影响范围内平均红外辐射温度均出现较大的波动,最大波动值为0.26℃。
[Abstract]:In this paper, the variation law of infrared radiation temperature in short wall face mining process is studied by similar simulation of Wangervili filling coal mining method. In this paper, the stress and strain law of surrounding rock of roadway in Wanggeveli filling method is simulated by using FLAC3D software, and the abnormal region of infrared radiation temperature change is found in infrared radiation thermal image. Quantitative analysis of the average infrared radiation temperature in the abnormal region of infrared radiation temperature variation is carried out. The experimental results are of certain guiding significance to the control of mine pressure in Wanggeveli filling coal mining method. In the infrared radiation temperature experiment, the external interference factors have a great influence on the experimental results, and due to the irreversibility, complexity and randomness of the external interference factors, it is not feasible to calculate the infrared radiation through the theory. In this paper, the reference region denoising method is proposed, which is based on the principle that the average infrared radiation temperature on the surface of the object is relatively small under the condition that the internal factors are basically stable. By referring to the regional average infrared radiation temperature curve, the infrared radiation of all external influence factors is removed, and the real average infrared radiation temperature on the surface of the object is obtained. And this paper puts forward the correlation coefficient as the evaluation criterion of reference region selection. In this paper, the variation characteristics of infrared radiation image of roadway in different stages and the variation characteristics of average infrared radiation temperature in the influence area of roadway excavation in stope are analyzed. The main research results are as follows: (1) by analyzing the variation characteristics of infrared radiation image of stope roadway at different stages, we can clearly see the temperature anomaly area around the roadway in the monitoring area. Before excavation of roadways in all stope, the average infrared radiation temperature fluctuates little before excavation by reference area de-noising method. The average infrared radiation temperature variation curve is basically stable, and the amplitude is within 0.10 鈩，

本文编号：1990312