摘要
蝶形破坏理论为定量研究地下围岩力学行为及解决地下工程灾害提供新的思路和方法.针对业内专家学者对蝶形破坏理论重点关心的问题展开研究,通过理论分析与数值模拟分析了理论计算的可靠性,以及蝶形破坏理论在不同巷道断面形状、层状围岩条件下的适用性.结果表明:1)理论计算与数值模拟得到的塑性区的形态与发展规律完全一致,仅在塑性区范围计算精度上有所差别,理论公式在研究巷道围岩力学行为规律方面具有可靠性;2)不同巷道断面形状围岩的蝶形破坏具有相似性,理论计算得到的蝶形破坏规律在非圆形断面条件下仍然适用;3)在层状围岩条件下岩层之间性质的差异导致巷道围岩蝶形破坏表现出选择性,但蝶形显现部位仍然符合蝶形破坏的数学界定,因此蝶形破坏理论在层状围岩条件下仍然适用.
The butterfly failure theory provided new ideas and methods for studying mechanical behavior of underground surrounding rock and solving underground engineering disasters.The key concerns of butterfly failure theory mentioned by the experts and scholars were studied.The reliability of theoretical calculation and the applicability of butterfly failure theory with different roadway section shapes and layered surrounding rock conditions were studied by theoretical analysis and numerical simulation methods.The results show that:1)The shapes and development law of plastic zone obtained by theoretical calculation and numerical simulation are identical,only the calculation accuracies of two methods about the range of plastic zone are different.The theoretical formula is reliable in studying the mechanical behavior law of the roadway surrounding rock;2)The butterfly failure of the surrounding rock with different roadway section shapes is similar,and the butterfly failure rule obtained by theoretical calculation is still applicable to non-circular section;3)Under the condition of stratified surrounding rock,the butterfly failure of roadway surrounding rock shows selective manifestation due to the difference between rock stratas,but the butterfly failure location still conforms to the mathematical definition of the butterfly failure zone.So the butterfly failure theory is still applicable to the condition of stratified surrounding rock.
作者
郭晓菲
郭林峰
马念杰
赵志强
李臣
GUO Xiaofei;GUO Linfeng;MA Nianjie;ZHAO Zhiqiang;LI Chen(School of Energy and Mining Engineering,Research Center of Roadway Support and Disaster PreventionEngineering in Coal Industry,China University of Mining and Technology(Beijing),Beijing 100083,China)
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2020年第4期646-653,660,共9页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(51704294,51434006)。
关键词
蝶形破坏
适用性
层状围岩
巷道断面
butterfly failure
applicability
layered surrounding rock
roadway section
