| 对“基于薄板理论的采场覆岩关键层的判别方法”的商榷 |
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| 引用本文： | 秦伟,许家林.对“基于薄板理论的采场覆岩关键层的判别方法”的商榷[J].煤炭学报,2010,35(2):194-197. |
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| 作者姓名： | 秦伟 许家林 |
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| 作者单位： | 煤炭资源与安全开采国家重点实验室;中国矿业大学矿业工程学院; |
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| 基金项目： | 国家重点基础研究发展计划(973)基金资助项目(2007CB209400);;教育部“新世纪优秀人才支持计划”资助项目(NCET-05-0478);;国家自然科学基金重点资助项目(50834005);;国家自然科学基金资助项目(50974116) |
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| 摘 要： | 就工作面宽度与关键层位置判别的关系以及基于薄板模型的关键层判别方法存在的局限性进行了研究。结果表明:一般情况下,各硬岩层的破断顺序是由各硬岩层步距准数所决定的,与工作面宽度无关,因此无论是采用梁模型还是薄板模型对关键层位置的判别结果没有影响;上覆硬岩层几何尺寸并不一定能符合薄板的定义,而且基于薄板模型的关键层判别方法需要工作面宽度才能进行计算,如果工作面宽度小于上覆硬岩层的步距准数,硬岩层将稳定不破断,就无法得到硬岩层的破断距,也就无法通过比较硬岩层破断顺序来确定关键层位置。
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| 关 键 词： | 薄板模型 关键层 判别方法 工作面宽度 梁模型 |
Discussion on Key stratum distinguishing method of overlying strata based on the thin slab theory |
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| QIN Wei,XU Jia-lin.Discussion on Key stratum distinguishing method of overlying strata based on the thin slab theory[J].Journal of China Coal Society,2010,35(2):194-197. |
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| Authors: | QIN Wei XU Jia-lin |
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| Affiliation: | 1. State Key Laboratory of Coal Resources and Safety Mining/a>;Xuzhou 221008/a>;China/a>;2. School of Mines/a>;China University of Mining and Technology/a>;China |
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| Abstract: | The limitations of key stratum distinguishing method based on the thin slab theory and the relationship between the width of working face and the key stratum distinguish were analyzed. The result shows that the breaking order of hard strata is decided by the span criterion of hard strata and it is not relate to the width of working face in gen-eral case. So using the thin slab model or clamped-clamped beam model has no effect to the distinguishing results of the key stratum. The geometry size of hard strata... |
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| Keywords: | thin slab model key stratum distinguishing method the width of working face clamped-clamped beam model |
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