《工程科学学报》录用稿，htps:/doi.org/10.13374/i,issn2095-9389.2021.06.17.008©北京科技大学2020 基于灰度共生矩阵和工业CT扫描的受载含瓦斯煤裂隙动态演化特征 王登科，3，吴岩，魏建平1，赵小龙，张宏图，朱传奇2，袁安营2 (1.河南理工大学河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地，河南焦作454000：2.安 徽理工大学深部煤矿采动响应与灾害防控国家重点实验室，安徽淮南232001：3.河南理工大学安全科学与工程学院，河 南焦作454000：4.煤炭安全生产与清洁高效利用省部共建协同创新中心，河南焦作454000：5.中国石化胜利油田分公司， 山东东营257000) 篇要：为研究受载含瓦斯煤在三轴压缩作用下的裂隙演化规律，利用受载含瓦斯煤显微工业CT扫描系统，开展了三轴加 载条件下受载含瓦斯煤的工业CT扫描测试，获取了受载含瓦斯煤的应力-应变曲线和各变形阶段的CT扫描图形。运用图像 分析软件对CT扫描数据进行了三维数字重建，实现了煤样内部裂隙的三维可视化和定量表征，并基于灰度共生矩阵 (GLCM)理论分析了受载含瓦斯煤的裂隙动态扩展特征及规律。研究结果表明：瓦斯压力的存在一定程度上弱化了受载含 瓦斯煤的力学性质，同时也加速了裂隙的扩展：受载含瓦斯煤二维裂隙先闭合后扩展，峰后快速扩展并形成连通二维裂隙 网络：三维裂隙体积和裂隙密度呈现出先减小后增大的变化趋势，总体上可划分为裂隙压密闭合、新裂隙萌生扩展和主裂隙 加速扩展贯通3个变化阶段：灰度共生矩阵分析中，对比度先减小后增大，能量和同质性先增欠后减小， 相关性呈现出单 调递减趋势，准确描述了受载含瓦斯煤内部裂隙随应力增加不断变化的总体发展规律。 关调：受载含瓦斯煤：工业CT扫描：裂隙动态演化：灰度共生矩阵：三维裂隙重建 Fracture dynamic evolution features of coal confaining gas using gray level co-occurrence matrix and industrial CT scanning WANG Dengke 234,WU Yan'3,WEI Jianping 34 ZHAO Xiaolong,ZHANG Hongtu'34.Zhu Chuanqi2,Yuan Anying (1.State Key Laboratory Cultivation Base for Gas Geology and Gas Control.Henan Polytechnic University,Henan Jiaozuo 454000 China;2.State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Anhui Huainan 232001,China;3.School of Safety Science and Engineering,Henan Polytechnic University, Henan Jiaozuo 454000,China;4.Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization,Henan Jiaozuo 454000,China;5.Sinopec Shengli Oilfield Company,Shandong Dongying 257000,China) Abstract:The expansion evolution law of internal fractures of coal under external load are of great significance to CBM production and control coal and gas outburst disasters.The coal body is generally in a three-dimensional stress state under the action of original in-situ stress.It is necessary to study the fracture evolution law of loaded coal containing gas under triaxial compression,the industrial CT scanning test of loaded coal containing gas under triaxial loading was carried out by using the Industrial micro-CT scanning system for loaded coal containing gas.The CT images and stress-strain curves of coal samples at each deformation stages were obtained.The 3D digital reconstruction of CT scanning data was carried out by using image analysis software,and the 3D visualization and quantitative characterization of internal fractures of coal samples were realized.Based on the gray level co- occurrence matrix(GLCM)theory the fraoture dynamic expansion characteristics and laws of loaded coal containing gas were analyzed.The results show that:the existence of gas pressure weakens the mechanical properties of loaded coal containing gas to a certain extent,and also accelerates the expansion of cracks.The two-dimensional fractures of the loaded coal containing gas first close and then expand,and then expand rapidly after the peak,forming a connected two-dimensional fracture network.The three- dimensional fracture volume and fracture density show a trend of first decreasing and then increasing,which can be divided into three stages:fracture compaction and closure,new fracture initiation and expansion,and main fracture accelerated expansion and penetration.In the gray level co-occurrence matrix analysis,the contrast first decreases and then increases,the energy and homogeneity first increases and then decreases,and the correlation presents a monotonic decreasing trend,which accurately describes the overall development law of the internal cracks of loaded coal containing gas changing with the increase of stress. Key words:Coal containing gas;Industrial CT scanning;Fracture dynamic evolution;Gray level co-occurrence matrix;3D fracture reconstruction 1引言 因其对矿井安全、环境保护和商业价值等方面的重 要作用，近年来受到人们越来越多的关注山，。煤是 一种具有发达孔隙结构的多孔介质，由包含原生 煤层气作为一种重要的非常规天然气资源， 孔隙的煤基质和天然裂隙组成)。其中天然裂隙为 盖童顺目：国家自然科学基金资助项目(51刀4118,51974109)：河南省高等学校重点科研项目计划基础研究专项(21004)：深部煤矿采动响应与灾害防控 国家重点实验室开放基金(SKLMRDPC20KF06):河南省科技创新领军人才计划(204200510032)。 Supported by the National Natural Science Foundation of China(Grant Nos.51774118,51974109):the Basic research project of key scientific research projects in Henan Province(21zx004):the Open Fund of the State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines (SKLMRDPC20KF06):the Program for Leading Talents in Scientific and Technological Innovation of Henan Province(204200510032). 作言筒介：王登科(I980-),男，教授、博士生导师，主要从事安全科学与工程方面的研究工作。E-mail:wdk@hpu.ed山.cn 题作着：魏建平(1971-)，男，教授、博士生导师，主要从事煤矿安全与瓦斯灾害治理方面的研究工作。E-mail:weijianping@hpu.edu.cn基于灰度共生矩阵和工业CT扫描的受载含瓦斯煤裂隙动态演化特征 王登科 1,2,3,4，吴岩 1,3，魏建平 1,3,4，赵小龙 5，张宏图 1,3,4，朱传奇 2，袁安营 2 （1. 河南理工大学 河南省瓦斯地质与瓦斯治理重点实验室–省部共建国家重点实验室培育基地，河南 焦作 454000；2. 安 徽理工大学 深部煤矿采动响应与灾害防控国家重点实验室，安徽 淮南 232001；3. 河南理工大学 安全科学与工程学院，河 南 焦作 454000；4. 煤炭安全生产与清洁高效利用省部共建协同创新中心，河南 焦作 454000；5. 中国石化胜利油田分公司， 山东 东营 257000） 摘要：为研究受载含瓦斯煤在三轴压缩作用下的裂隙演化规律，利用受载含瓦斯煤显微工业 CT 扫描系统，开展了三轴加 载条件下受载含瓦斯煤的工业 CT 扫描测试，获取了受载含瓦斯煤的应力-应变曲线和各变形阶段的 CT 扫描图形。运用图像 分析软件对 CT 扫描数据进行了三维数字重建，实现了煤样内部裂隙的三维可视化和定量表征，并基于灰度共生矩阵 （GLCM）理论分析了受载含瓦斯煤的裂隙动态扩展特征及规律。研究结果表明：瓦斯压力的存在一定程度上弱化了受载含 瓦斯煤的力学性质，同时也加速了裂隙的扩展；受载含瓦斯煤二维裂隙先闭合后扩展，峰后快速扩展并形成连通二维裂隙 网络；三维裂隙体积和裂隙密度呈现出先减小后增大的变化趋势，总体上可划分为裂隙压密闭合、新裂隙萌生扩展和主裂隙 加速扩展贯通 3 个变化阶段；灰度共生矩阵分析中，对比度先减小后增大，能量和同质性先增大后减小，相关性呈现出单 调递减趋势，准确描述了受载含瓦斯煤内部裂隙随应力增加不断变化的总体发展规律。 关键词：受载含瓦斯煤；工业 CT 扫描；裂隙动态演化；灰度共生矩阵；三维裂隙重建 Fracture dynamic evolution features of coal containing gas using gray level co-occurrence matrix and industrial CT scanning WANG Dengke1,2,3,4 , WU Yan1,3, WEI Jianping1,3,4, ZHAO Xiaolong5 , ZHANG Hongtu1,3,4 , Zhu Chuanqi2 , Yuan Anying2 (1. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Henan Jiaozuo 454000, China; 2. State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Anhui Huainan 232001, China; 3. School of Safety Science and Engineering, Henan Polytechnic University, Henan Jiaozuo 454000, China; 4. Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization, Henan Jiaozuo 454000, China; 5. Sinopec Shengli Oilfield Company, Shandong Dongying 257000, China) Abstract: The expansion evolution law of internal fractures of coal under external load are of great significance to CBM production and control coal and gas outburst disasters. The coal body is generally in a three-dimensional stress state under the action of original in-situ stress. It is necessary to study the fracture evolution law of loaded coal containing gas under triaxial compression, the industrial CT scanning test of loaded coal containing gas under triaxial loading was carried out by using the Industrial micro-CT scanning system for loaded coal containing gas. The CT images and stress-strain curves of coal samples at each deformation stages were obtained. The 3D digital reconstruction of CT scanning data was carried out by using image analysis software, and the 3D visualization and quantitative characterization of internal fractures of coal samples were realized. Based on the gray level co￾occurrence matrix (GLCM) theory, the fracture dynamic expansion characteristics and laws of loaded coal containing gas were analyzed. The results show that: the existence of gas pressure weakens the mechanical properties of loaded coal containing gas to a certain extent, and also accelerates the expansion of cracks. The two-dimensional fractures of the loaded coal containing gas first close and then expand, and then expand rapidly after the peak, forming a connected two-dimensional fracture network. The three￾dimensional fracture volume and fracture density show a trend of first decreasing and then increasing, which can be divided into three stages: fracture compaction and closure, new fracture initiation and expansion, and main fracture accelerated expansion and penetration. In the gray level co-occurrence matrix analysis, the contrast first decreases and then increases, the energy and homogeneity first increases and then decreases, and the correlation presents a monotonic decreasing trend, which accurately describes the overall development law of the internal cracks of loaded coal containing gas changing with the increase of stress. Key words: Coal containing gas; Industrial CT scanning; Fracture dynamic evolution; Gray level co-occurrence matrix; 3D fracture reconstruction 1 引 言 煤层气作为一种重要的非常规天然气资源， 因其对矿井安全、环境保护和商业价值等方面的重 要作用，近年来受到人们越来越多的关注[1, 2]。煤是 一种具有发达孔隙结构的多孔介质，由包含原生 孔隙的煤基质和天然裂隙组成[3]。其中天然裂隙为 ——————— 基金项目：国家自然科学基金资助项目(51774118，51974109)；河南省高等学校重点科研项目计划基础研究专项(21zx004)；深部煤矿采动响应与灾害防控 国家重点实验室开放基金(SKLMRDPC20KF06)；河南省科技创新领军人才计划(204200510032)。 Supported by the National Natural Science Foundation of China (Grant Nos. 51774118, 51974109)；the Basic research project of key scientific research projects in Henan Province(21zx004) ； the Open Fund of the State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines (SKLMRDPC20KF06)；the Program for Leading Talents in Scientific and Technological Innovation of Henan Province (204200510032)。 作者简介：王登科(1980–)，男，教授、博士生导师，主要从事安全科学与工程方面的研究工作。E-mail：wdk@hpu.edu.cn 通讯作者：魏建平(1971-)，男，教授、博士生导师，主要从事煤矿安全与瓦斯灾害治理方面的研究工作。E-mail：weijianping@hpu.edu.cn 《工程科学学报》录用稿，https://doi.org/10.13374/j.issn2095-9389.2021.06.17.008 ©北京科技大学 2020 录用稿件，非最终出版稿