| 浅埋深厚煤层综放开采顶板断裂力学模型 |
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| 引用本文： | 陈忠辉,冯竞竞,肖彩彩,李瑞华. 浅埋深厚煤层综放开采顶板断裂力学模型[J]. 煤炭学报, 2007, 32(5): 449-452 |
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| 作者姓名： | 陈忠辉 冯竞竞 肖彩彩 李瑞华 |
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| 作者单位： | 中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京,100083;中国矿业大学(北京)力学与建筑工程学院,北京,100083;中国矿业大学(北京)力学与建筑工程学院,北京,00083 |
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| 基金项目： | 国家自然科学基金资助项目(10572148)，教育部“新世纪优秀人才支持计划”资助项目(NCET-06-0201) |
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| 摘 要： | 根据浅埋深特厚煤层综放开采采高大，采空区垮落矸石不充分，不能有效支撑老顶岩梁，造成老顶架后切落的特点，建立了老顶断裂力学模型，利用断裂力学理论推导了老顶的断裂步距和支架的合理工作阻力.结果表明，老顶的断裂步距不仅与老顶的岩性特征和上覆岩层的荷载有关，而且与支架的工作阻力和水平挤压力有关.对平朔安家岭地下矿综放开采支架合理工作阻力进行分析，理论结果和实测结果比较一致.
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| 关 键 词： | 浅埋深特厚煤层 综放开采 顶板断裂 |
| 文章编号： | 0253-9993(2007)05-0449-04 |
| 收稿时间： | 2006-08-17 |
| 修稿时间： | 2006-08-17 |
Fracture mechanical model of key roof for fully-mechanized top-coal caving in shallow thick coalseam |
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| CHEN Zhong-hui,FENG Jing-jing,XIAO Cai-cai,LI Rui-hua. Fracture mechanical model of key roof for fully-mechanized top-coal caving in shallow thick coalseam[J]. Journal of China Coal Society, 2007, 32(5): 449-452 |
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| Authors: | CHEN Zhong-hui FENG Jing-jing XIAO Cai-cai LI Rui-hua |
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| Abstract: | Based on the high mining height of fully-mechanized top-coal caving in shallow thick coal seam and the few falling waste rock in goal, the key roof can not be supported effectively,the facture mechanical model of key roof was established.The fracture step of key step and reasonable working resistance of support were obtained by using fracture mechanics.The results show that the fracture step of key roof relate to not only the mechanical character of key roof and the load of overlaying rock seam,but also the working resistance of support and horizontal pressure in key roof.The reasonable working resistance of support was analyzed in Anjialing coal mine,Pingshuo City.The theoretical results are well agreeable with the on-the-spot results. |
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| Keywords: | shallow thick coal seam fully-mechanized top-coal caving roof fracture |
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