CAJ | 학술논문

基于X射线的CT扫描技术，因其具有多层位、对同一岩石试件可连续、无损扫描等优点，在岩石力学与工程研究中得到了广泛应用。对岩石单轴压缩破坏过程进行实时CT扫描，也是岩石力学研究的重要内容之一。针对三维显微CT试验系统实时监测煤岩单轴压缩破坏过程中，因位移误差会引起扫描层定位不准确，进而影响试验结果这一基本问题，提出了基于图像检索技术的 CT 扫描图像处理方法。通过对煤岩试样在单轴载荷作用下破坏过程的 CT 实时监测，并引入基于Manhattan 距离的相似性计算方法，检索出岩石试件同一层位在不同应力状态下的相似扫描层。结果表明，采用图像检索的方法，可以有效地减小煤岩在加载破坏过程中位移误差的影响，更好地通过CT图像来描述煤岩在不同应力状态下的微裂纹分布状况和演化规律，从而在细观层次上揭示岩石在单轴压缩条件下破坏的基本规律。
기우X사선적CT소묘기술，인기구유다층위、대동일암석시건가련속、무손소묘등우점，재암석역학여공정연구중득도료엄범응용。대암석단축압축파배과정진행실시CT소묘，야시암석역학연구적중요내용지일。침대삼유현미CT시험계통실시감측매암단축압축파배과정중，인위이오차회인기소묘층정위불준학，진이영향시험결과저일기본문제，제출료기우도상검색기술적 CT 소묘도상처리방법。통과대매암시양재단축재하작용하파배과정적 CT 실시감측，병인입기우Manhattan 거리적상사성계산방법，검색출암석시건동일층위재불동응력상태하적상사소묘층。결과표명，채용도상검색적방법，가이유효지감소매암재가재파배과정중위이오차적영향，경호지통과CT도상래묘술매암재불동응력상태하적미렬문분포상황화연화규률，종이재세관층차상게시암석재단축압축조건하파배적기본규률。
The CT scanning technology based on the X-Ray, which can scan a rock specimen through multilayer continuously and nondestructively, has been introduced into the study of the rock mechanics and engineering widely. It is one of the important content of rock mechanics research, to monitor the failure processing of rock sample under uniaxial compression loading by CT technology. During the 3D microscope CT real-time monitoring of rock condition under uniaxial compression loading, there will be some error caused by the imprecise positioning of the CT scanner device. Aiming at this imperfection, a new CT slice image processing method based on image retrieval (IR) technology, is proposed. Coal and rock sample under uniaxial compression loading, is monitored during its failure process, and with the similarity computing method based on the Manhattan distance measure introduced, the rock sample’s CT image and its similar-slices of different stress stages are retrieved. The results show that: The IR technology may effectively reduce the error due to the displacement during the coal and rock failure process; with the help of CT slice image, microcrack distribution and evolution rule of the coal and rock samples in different stress stages, can be preferably described; moreover, at mesoscopic level, the basic law of coal and rock failure process under the uniaxial compression loading, get further revealed.