| 煤层采动后甲烷运移与聚集形态分析 |
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| 引用本文： | 李树刚,钱鸣高,石平五. 煤层采动后甲烷运移与聚集形态分析[J]. 煤田地质与勘探, 2000, 28(5): 31-33 |
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| 作者姓名： | 李树刚 钱鸣高 石平五 |
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| 作者单位： | 1. 西安科技学院 710054; |
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| 基金项目： | 国家自然科学基金!重点资助项目 (编号 :59734 0 90 ) |
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| 摘 要： | 富含甲烷厚煤层经综采放顶煤方法开采后,甲烷运移通道和聚集空间随采场上覆岩层活动特征及导气裂隙带空间分布形态而不同。本文分析了煤层采动后采场覆岩关键层活动特征对导气裂隙带分布形态的影响,提出上覆岩层中破断裂隙和离层裂隙贯通后在空间形成椭抛带分布,阐述了卸压甲烷在椭抛带的升浮—扩散运移理论,为实现煤层与甲烷的安全共采提供了科学依据。
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| 关 键 词： | 采动裂隙 煤层气 运移 聚集 椭抛带 |
| 收稿时间： | 1999-12-02 |
| 修稿时间： | 1999-12-02 |
METHANE MIGRATION AND ACCUMULATION STATE AFTER SEAM MINING |
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| Li Shugang,Qian Minggao,Shi Pingwu. METHANE MIGRATION AND ACCUMULATION STATE AFTER SEAM MINING[J]. Coal Geology & Exploration, 2000, 28(5): 31-33 |
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| Authors: | Li Shugang Qian Minggao Shi Pingwu |
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| Affiliation: | 1. Xian University of Science and Technology;2. China University of Mining and Technology;3. Xian University of science and Technology |
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| Abstract: | The pathway of methane migration and methane accumulation space are varying with both of activities in overburden and the occurrence pattern of fractured zones after comprehensive mining in methane rich thick coal seams.The influences of variation caused by mining operation in over key seams to pattern of fractured zone occurrence are analyzed.It is proposed that if the crush zone and separated bed zone were connected,a elliptic parabolic shaped zone would be formed.The liftion diffusion theory of methane from relieved zone in the elliptic parabolic shaped zone is explained,that will be served as scientific base for coal and gas production. |
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| Keywords: | fracture caused by mining coalbed methane migration accumulation parabolic zone |
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