瓦斯放散初速度测定仪校准技术及装置研究

发布时间：2018-06-24 23:41

本文选题：瓦斯放散初速度 + 校准装置　；参考：《中国矿业大学》2017年硕士论文

【摘要】：瓦斯放散初速度是预测煤与瓦斯突出危险性的重要指标之一,能否准确测定该指标对煤矿安全生产具有重要的意义。从该指标提出至今,国内的学者已研制出了多种瓦斯放散初速度测定仪,但在测定仪校准方面未有学者进行过相关研究。因此,为确保测定仪在经过长期使用后仍具有极好的可靠性和准确性,本文对瓦斯放散初速度测定仪的校准技术与装置进行了研究。首先对瓦斯放散初速度的影响因素进行了相关分析。通过对变容变压式和等容变压式两种测定仪的影响因素分析,结合瓦斯放散规律的研究,得出瓦斯放散初速度指标不仅与煤样自身特性有关,还与充气压力、所测煤样的质量、测定仪的设计参数及实验温度等因素有关。其次根据《煤的瓦斯放散初速度指标(ΔP)测定方法》(AQ1080-2009)中的相关说明,确定了校准装置依照等容变压式原理进行设计,各组成部分也按照该行业标准中对相关参数的要求进行制作。经过固定空间体积标定、气密性检测、可靠性及不确定度分析后,得到了一台标准的、可靠的校准装置。然后在实际校准过程中我们发现3.5g的煤样无法装入行业标准所要求的5ml的试样瓶中,通过碎胀性实验分析了原因。并通过测定5ml试样瓶可以容纳质量的煤的瓦斯放散初速度,推算出了3.5g煤的瓦斯放散初速度,再将推算结果和7ml试样瓶实测3.5g煤的瓦斯放散初速度值进行比较,为校准装置选择了合理的试样瓶容积。此外还设计了恒温实验平台,选取了多个温度点和多个煤样,分析了温度对测定瓦斯放散初速度的影响,通过实验可以看出,要实现对测定仪的准确校准,就必须保证校准装置和测定仪在同一温度条件下测定相同煤样的瓦斯放散初速度,此外,实验室的测定温度应根据实际取样煤层的温度来确定,使所测结果更具指导意义。最后利用研制的校准装置对实验室现有的WT-1型瓦斯放散初速度测定仪进行了校准实验研究。
[Abstract]:The initial velocity of gas release is one of the important indexes to predict the danger of coal and gas outburst. Since this index was put forward, domestic scholars have developed a variety of initial velocity measuring instruments for gas release, but no scholars have carried out relevant research on calibration of the instrument. Therefore, in order to ensure that the instrument still has excellent reliability and accuracy after a long period of service, this paper studies the calibration technology and equipment of the initial velocity meter for gas release. First of all, the influence factors of the initial velocity of gas release are analyzed. Through the analysis of the influencing factors of the two kinds of measuring instruments, the variable volume pressure type and the isovolumic pressure type, combined with the study of the law of gas release, it is concluded that the initial velocity index of gas release is not only related to the characteristics of coal sample itself, but also related to the gas pressure and the quality of the coal sample measured. The design parameters and experimental temperature of the instrument are related. Secondly, according to the related explanation in the determination method of initial velocity of coal gas release (螖 P) (AQ1080-2009), it is determined that the calibration device is designed according to the principle of isovolumic pressure variation, and each component is also made according to the requirements of the relevant parameters in the industry standard. After fixed space volume calibration, air tightness detection, reliability and uncertainty analysis, a standard and reliable calibration device is obtained. Then in the actual calibration process we found that the 3.5 g coal sample could not be loaded into the 5ml sample bottle required by the industry standard. The cause was analyzed by the dilatancy experiment. The initial velocity of gas emission of 3.5 g coal is calculated by measuring the initial velocity of gas emission of coal which can hold mass in 5ml sample bottle, and the calculated results are compared with the initial velocity value of gas emission of 3.5 g coal measured in 7ml sample bottle. The reasonable volume of the sample bottle is selected for the calibration device. In addition, a constant temperature experimental platform is designed, and several temperature points and coal samples are selected, and the influence of temperature on the initial velocity of gas release is analyzed. It can be seen from the experiment that the accurate calibration of the measuring instrument should be realized. It is necessary to ensure that the initial velocity of gas emission of the same coal sample can be measured by the calibration device and the measuring instrument under the same temperature condition. In addition, the temperature measured in the laboratory should be determined according to the temperature of the actual sampling coal seam, so that the measured results are more instructive. At last, the calibration experiment of WT-1 initial velocity measuring instrument for gas emission is carried out by using the calibration device developed in this paper.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD713.2

【参考文献】