| 基于岩性-结构的煤层底板突水危险性评价 |
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| 引用本文： | 孟召平,张贝贝,谢晓彤,申正伟,何方俊,潘之德.基于岩性-结构的煤层底板突水危险性评价[J].煤田地质与勘探,2011,39(5):35-40. |
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| 作者姓名： | 孟召平 张贝贝 谢晓彤 申正伟 何方俊 潘之德 |
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| 作者单位： | 1. 中国矿业大学煤炭资源与安全开采国家重点实验室, 地球科学与测绘工程学院, 北京 100083; |
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| 基金项目： | 国家重点基础研究发展计划(973计划)项目(2007CB209405); 国家自然科学基金项目(4117214541030422); 教育部高等学校博士学科点专项科研基金项目(20100023110003); 神华集团科技创新项目(SHGF-11-08); 煤炭资源与安全开采国家重点实验室自主研究课题(SKLCRSM10B06) |
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| 摘 要： | 煤层顶底板突水危险性预测与评价是煤矿突水灾害防治的基础和依据。针对煤层底板隔水介质条件，分析了煤系岩石力学性质，煤层底板突水的岩性、结构和厚度特征，建立了煤层底板突水危险性评价理论和方法。研究表明:煤层底板隔水介质条件取决于隔水层岩性和断裂构造，随着底板泥岩含量增加，煤层底板隔水性能增高，但抗水压能力降低；随着断裂发育程度的增加，底板隔水层由完整结构、块裂结构到碎裂结构和松散结构，煤层底板抗水压能力和隔水性能均降低，突水危险性增大。煤层底板抗水压能力与煤层底板隔水层厚度密切相关，统计表明，煤层底板受的极限水压p与底板隔水层厚度h之间为2次幂函数关系。在传统突水系数的基础上考虑了隔水层的岩性和结构特征，提出了煤层底板突水危险评价分类；进一步根据水压Pw与岩体破裂压力Pc关系和水压Pw与最小主应力σhmin关系判断是否突水。
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| 关 键 词： | 煤层底板 岩性-结构 突水危险性 |
| 收稿时间： | 2010-11-01 |
Evaluation of water inrush risk of seam floor based on lithology-structure |
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| MENG Zhaoping,ZHANG Beibei,XIE Xiaotong,SHEN Zhengwei,HE Fangjun,PAN Zhide.Evaluation of water inrush risk of seam floor based on lithology-structure[J].Coal Geology & Exploration,2011,39(5):35-40. |
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| Authors: | MENG Zhaoping ZHANG Beibei XIE Xiaotong SHEN Zhengwei HE Fangjun PAN Zhide |
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| Institution: | 1. State Key Laboratory of Coal Resources and Safe Mining, College of Geosciences and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China;2. Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education, China Three Gorges University, Yichang 443002, China |
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| Abstract: | Water inrush risk prediction and evaluation of seam roof and floor are the foundation of water inrush disasters prevention in coal mines.According to the waterproof medium conditions of seam floor,the mechanical properties of coal-measure rock and the lithology,structure and thickness of seam floor were analyzed,the theory and methods of water inrush risk evaluation of seam floor were founded.It is shown that the waterproof medium conditions of seam floor depend on the lithlogy of aquifuge and the structure... |
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| Keywords: | coal floor lithology-structure water inrush risk |
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