摘要
以开滦矿区典型冲击地压矿井——赵各庄矿——不同冲击倾向性煤层煤体为研究对象,通过X射线衍射、光学电子显微镜等一系列细观试验,分析了该矿7,9,12号煤层煤体的细观结构特征,并与忻州窑矿11号煤层煤样细观结构特征进行对比.基于煤体微结构参数定量地研究了煤体冲击倾向性的强弱,得到了煤层内细观结构参数、有机组分分布等因素与冲击倾向性的关系.结果表明:在相同应力、地质条件下,忻州窑矿11号煤更易发生冲击地压;显微硬度和显微脆度均较大的煤体较易发生冲击;镜质组最大反射率与最小反射率之差越小,冲击倾向性越小;显微组分分布简单且原生损伤越小的情况下,冲击倾向性越小.
Analyzed the microstructure characteristics of bump which included X- Ray diffraction and electronic microscope 12 coal seams in Zhaogezhuang Mine and No. 11 coal seam in to figure out the characteristics of different bump - prone coal. - prone coal. A series of experiments were finished, investigation. The samples were from No. 7, 9 and Xinzhouyao Mine. The compared analysis was done The microstructure parameters were adopted to describe coal pre-condition to bump. The relationship between the microstructure of coal sample, the distribution of organic macerals and coal bump - prone property was achieved. The results show that the No. 11 coal seam in Xinzhouyao Mine is easier to bump out compared with the seams in Zhaogezhuang Mine at the same geological and stress conditions. The bigger values of microhardness and microbrittleness is, the more bump-prone property the coal seam has. The more difference of vitrinite reflectance, the lower possibility of coal bump. Moreover, the simpler of micro-macerals distribution, the lower dangerous to bump.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2007年第1期64-68,共5页
Journal of China Coal Society
基金
国家自然科学基金重大项目基金资助(50490272)
国家重点基础研究发展规划(973)资助项目(2002CB412705)
国家科技支撑计划课题(2006BAK03B06)
国家自然科学基金资助项目(10572147)
教育部创新团体计划资助项目(IRT0408)
教育部重大科技项目基金资助项目(10427)
关键词
冲击地压倾向性
煤体结构特征
X射线衍射
bump - prone property
microstructure characteristics of coal
X - Ray diffraction （XRD）
