1. State Key Lab of Coal Resources and Safe Mining, China University of Mining and Technology(Beijing), Beijing　 100083,China;2. Faculty of Resource and Safety Engineering,China University of Mining and Technology(Beijing),Beijing　 100083,China;3. Department of Mining and Materials Engineering, McGill University,Montreal　 H2X1T6,Canada;4. Wangzhuang Coal Mine,Lu’an Group,Changzhi　 046031,China

与数字式全景钻孔摄像系统相比,目前的前视电子钻孔窥视系统仅能通过摄像头对探头前方钻孔进行视频记录,后通过人工方式进行统计,无法得到钻孔全景图片或进行定量分析。通过研究窥视视频与实际钻孔之间的对应关系,提出了等效圆、等效直线的概念,推导了圆形窥视截图拉伸变形为矩形窥视截图的坐标变换公式,最终提出了前视电子钻孔窥视视频提取钻孔全景图片的方法。利用该方法成功地从常村矿N3-7工作面的前视窥视视频提取出钻孔全景图片,并通过H(色度)S(饱和度)L(亮度)色彩空间对全景图片进行了分析,计算出了钻孔中典型裂隙面的产状信息。该方法可以对钻孔内的裂隙等构造进行定量分析,适用于任何前视电子钻孔窥视系统。

Compared with the panoramic borehole imaging system,the forward borehole camera can only record videos. Through statistical methods,a qualitative description of borehole can be obtained,while a quantitative analysis cannot be done. To solve this problem,an approach,which can transform the videos from forward borehole camera into panora- ma images,was proposed. The concept of equivalent circle in the video screenshots was presented,which equals to the corresponding borehole in-situ information. Then a coordinate transformation formula was derived to convert circular images to rectangular ones. Finally,a borehole video of N3 -7 working face in Changcun Coal Mine was successfully transformed into panoramic images by utilizing this method. After that,the panoramic images were processed by using the HSL color space. One panoramic image was analyzed,and the dip angle and tendency of the crack faces in-situ were obtained. Quantitative analysis can be taken by employing this method,and it can be used in any forward bore- hole camera system.

国家重点基础研究发展计划(973)资助项目(2011CB201202)；国家自然科学基金资助项目(51374216)；中央高校基本科研业务费资助项目(2009kz03)；

Nie Baisheng,Zhang Hui,Cui Shujiang,et al. Extraction method of borehole panoramic image from televiewer video[ J]. Journal of China Coal Society,2016,41(5):1316-1322.