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| 巷道围岩承载结构弹塑性理论分析 |
| Elastic-plastic theory analysis of bearing structure of rock around deep roadway |
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| DOI： |
| 中文关键词: 围岩承载结构;支护力;广义Hoek-Brown准则;塑性区范围 |
| 英文关键词: bearing structure of surrounding rock; supporting pressure; generalized Hoek-Brown failure criterion; range of plastic zone |
| 基金项目:国家自然科学基金资助项目(51374104;51274095;51274096) |
| 作者 | 单位 | | 曾赤,李树清,谭玉林,李兴,谭妍 | 湖南科技大学 能源与安全工程学院,湖南 湘潭 411201
湖南科技大学 煤矿安全开采技术湖南省重点实验室,湖南 湘潭 411201 |
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| 中文摘要: |
| 为了分析巷道围岩承载结构与支护的相互作用,建立了圆形巷道围岩内、外承载结构弹塑性分析力学模型,应用广义Hoek-Brown破坏准则和弹塑性基本理论,得到了塑性区半径和围岩承载结构相关参数的表达式.通过实例分析了巷道围岩承载结构与围岩稳定的关系,以及支护力对巷道围岩承载结构相关参数的影响.结果表明:外承载结构位置、宽度以及塑性承载结构宽度与巷道围岩变形量及塑性区范围密切相关;随支护力增大,巷道围岩承载结构越靠近巷道周边. |
| 英文摘要: |
| In order to analyze the interaction relations of bearing structure and supporting of roadway surrounding rock, the elastic-plastic mechanics analysis model of inner-outer bearing structure of circular roadway surrounding rock is established, by means of applying the generalized Hoek-Brown failure criterion and the basic theory of elastic-plastic. The expressions of the radius of plastic zone and the related parameters of surrounding rock bearing structure are obtained. Relationship between the bearing structure and the stability of surrounding rock of roadway surrounding rock, and the influence of supporting pressure on the bearing structural parameters of surrounding rock of roadway are analyzed by one instance. Results show that the position and width of outer bearing structure and the width of the plastic bearing structure, have greater influence on the deformation of surrounding rock of roadway and the range of plastic zone. With the increase of supporting pressure, the bearing structure of roadway surrounding rock approaches the perimeter. |
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