煤矿安全2019，Vol.50Issue(6)：36-40,5.DOI:10.13347/j.cnki.mkaq.2019.06.009
巷道顶板承载梁结构强度参数衰减规律研究
Study on Attenuation Law of Structural Strength Parameters of Bearing Beaming in Roadway Roof
摘要
Abstract
In the post-peak plastic deformation process of coal and rock materials after failure, the strength parameters gradually decline and the bearing capacity of the material structure declines, which leads to the instability of the coal and rock engineering structure. In the view of the problem in attenuation of structural strength and bearing capacity of layered roof which effects safety and stability of roadway, to reveal weakening process of bearing capacity of bearing beam structure from macroscopic perspective, the method of revealing the essential relationship of bearing capacity weakening of coal engineering structure was proposed based on the attenuation law of equivalent macro-strength parameters . The attenuation model of structural bearing capacity was established. Moreover, the attenuation law of structural bearing capacity was analyzed by FLAC numerical calculation program. The results show that the variety law was obtained that the equivalent macro-strength parameters of cohesion and internal friction angel were attenuated in the form of cubic polynomial function with the increase of normalized interval variable δ of plastic shear strain.关键词
巷道层状顶板/承载梁/承载能力/等效宏观强度参数/衰减规律Key words
layered roof of roadway/bearing beam/bearing capacity/equivalent macro-strength parameter/attenuation law分类
矿业与冶金引用本文复制引用
周波,袁亮,薛生..巷道顶板承载梁结构强度参数衰减规律研究[J].煤矿安全,2019,50(6):36-40,5.基金项目
国家自然科学基金资助项目(51374011) （51374011）
安徽省高校优秀青年人才支持计划重点资助项目(gxyqZD2019121) （gxyqZD2019121）
安徽省重点科学研究基金资助项目(KJ2018A0758,KJ2018A0184) （KJ2018A0758,KJ2018A0184）
