摘要
离散元模拟、物理模拟表明,锚杆支护煤巷层状结构顶板形成组合拱梁结构,锚杆支护机制相应称为组合拱梁作用,据此理论建立组合拱梁平均应力计算公式,该公式可综合反映锚固拱梁厚度、巷道跨度、岩层厚度、完整系数对顶板稳定性的影响,并讨论它们的影响规律,得到的结论符合工程规律。
The distinct element method,physical simulation and theoretical analysis have made it clear that the bolted stratified rock roof forms combined voussoir beams. The combined voussoir beams effect is one of the working mechanics of the rock bolting. Based on this theory,the average stress formula of the combined voussoir beams is derived. This formula can reflect the influencing factors on the stability of rock roof synthetically,such as the thickness of combined voussoir beams,the span of roadway,the thickness of single rock stratum,and the integrated coefficient of rock. The influencing regularity is discussed and the results complies with the practice.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2007年第S2期4215-4220,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩石力学
层状结构
锚杆支护
支护机制
组合拱梁
rock mechanics
stratified structure
bolting support
support mechanicsm
combined voussoir beams
