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煤层割理与煤级的关系 被引量:37
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作者 毕建军 苏现波 +1 位作者 韩德馨 陈江峰 《煤炭学报》 EI CAS CSCD 北大核心 2001年第4期346-349,共4页
通过对煤中割理的宏观观测、光学显微镜、扫描电镜观测等实验 ,详细研究了割理与煤级的关系 .指出煤中割理密度随煤级的增高存在 3种变化趋势 :①随煤级增高割理密度增加 ,在中煤级阶段达极大值 ,之后逐渐降低 ;②随煤级增高密度增加 ,... 通过对煤中割理的宏观观测、光学显微镜、扫描电镜观测等实验 ,详细研究了割理与煤级的关系 .指出煤中割理密度随煤级的增高存在 3种变化趋势 :①随煤级增高割理密度增加 ,在中煤级阶段达极大值 ,之后逐渐降低 ;②随煤级增高密度增加 ,在中煤级阶段达极大值后 ,随煤级进一步增加密度保持不变 ;③在中煤级阶段密度达极大值后 ,随煤级增高逐渐降低 ,但在反射率大于 4 %时 ,保持不变 .同时探讨了割理的成因与闭合机理 . 展开更多
关键词 煤级 割理成因 煤层 闭合机理 煤层气 割理密度
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Forensic medical study on morphology and formative mechanism of blunt head injury
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作者 LI Hong-weit CHANG Hong-fa +2 位作者 YU Yong-mi DAI Guo-xin YIN Zhi-yong 《Chinese Journal of Traumatology》 CAS 2012年第6期342-345,共4页
Objective: To study the patterns and morphologic characteristics of blunt head injury and analyse its formative mechanism in attempt to provide references for medicolegal expertise. Methods: The statistical analysi... Objective: To study the patterns and morphologic characteristics of blunt head injury and analyse its formative mechanism in attempt to provide references for medicolegal expertise. Methods: The statistical analysis was done in terms of gender, age, as well as the nature, pattern, location, and feature of the injuries. Results: Among the 202 cases of head injury-induced death, 124 were male and 78 female with the age ranging from 1-81 years. Death caused by homicide was dominant (106, 52.5%), followed by suicide (49, 24.3%) and accident (44, 21.8%). The majority of suicide-induced death were byfalling from height, and traffic crash was responsible for majority of unexpected death cases. The morphology and pathogenesis of the injuries varied according to differences on the mode, magnitude, and orientation of the outside force giving rise to blunt injury as well as the character of vulnerants. Conclusion: Studies on the morphology and its forma- tive rationale of blunt head injury will offer easy access to medicolegal expertise on the mode and character of the injury. 展开更多
关键词 BRAIN Head injuries closed Cranioce-rebral trauma Forensic medicine
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