无线电波探测瓦斯富集区理论与方法

发布时间：2018-04-27 04:01

本文选题：无线电波 + 坑道透视　；参考：《煤炭学报》2017年S1期

【摘要】：为了准确预测煤层回采工作面瓦斯富集区情况,基于矿井无线电波透视理论,对瓦斯压力与无线电波透视曲线变化关系进行了物理试验,并根据井下回采工作面实际情况进行了煤层瓦斯富集区的无线电波曲线变化特征的正演模拟,探讨了无线电波透视探测瓦斯富集区的曲线特征,并在煤矿井下进行试验。研究得出,煤层瓦斯压力与无线电波透视衰减曲线呈现一致性变化,煤层瓦斯富集区的存在会造成无线电波坑透的异常区域,相对于正常煤层接收机接收值来说,煤层瓦斯富集区的异常曲线整体呈现接收值偏小,而且中间区域衰减的更大些,两边相对衰减的小些,形成一个"蝙蝠"形状。经过在煤矿井下的实验验证,无线电波透视成果结合地质资料分析,可以用来较为准确地划分煤与瓦斯突出危险区。
[Abstract]:In order to accurately predict the gas accumulation area in coal mining face, based on the theory of coal mine radio wave perspective, the relationship between gas pressure and radio wave perspective curve is tested. According to the actual situation of underground coal mining face, the forward modeling of radio wave curve change characteristics in coal seam gas accumulation area is carried out, and the curve characteristic of radio wave penetration detection gas accumulation area is discussed, and the experiment is carried out in coal mine. The study shows that the attenuation curve of coal seam gas pressure and radio wave perspective is consistent, and the existence of coal seam gas accumulation area will result in abnormal area of radio wave pit penetration, which is relative to the normal coal seam receiver receiving value. The abnormal curve of coal seam gas rich area presents the receiving value to be small as a whole, and the attenuation of the middle area is bigger, and the relative attenuation of both sides is smaller, forming a "bat" shape. The results of radio wave analysis combined with geological data can be used to divide coal and gas outburst risk areas more accurately.
【作者单位】：中煤科工集团重庆研究院有限公司;
【基金】：国家科技重大专项资助项目(2016ZX05045004-007)
【分类号】：TD712

【相似文献】