NettetLongwall top coal caving (LTCC) is a relatively new method of mining thick coal seams that is currently achieving high productivity and efficiency in application, particularly in China. The technique Nettet4. feb. 2016 · 基于岩石应变强度理论以及岩石微元强度服从Weibull随机分布的假设，本文考虑岩石峰后残余强度对损伤变量进行了修正，在微元破坏符合Hoek．Brown屈服准则条件下，建立了能够反映岩石峰后软化特征的三维损伤统计本构模型；然后，依据岩石试验全应力．应变曲线的几何特征，推导出本构模型参数 ...
霍克一布朗准则 - 百度百科
NettetHoek-Brown强度准则的基本参数应该通过原位试验和室内试验确定。为了帮助用户了解此模型各参数的常见取值范围，我们提供了一张Hoek-Brown模型各参数取值范围的表格 … Nettet心理学实验设计题案例,拥挤这种状态在大多数情况下都是不让人喜欢的，比如每天上班的公交地铁上，堵塞的路口以及川流不息的人群都会让人产生焦躁不安的情绪。近几十年来，对于“拥挤是否会造成个 gold paw series llc
节理单元在岩体稳定性分析中的应用’
The Hoek–Brown failure criterion is an empirical stress surface that is used in rock mechanics to predict the failure of rock. The original version of the Hoek–Brown criterion was developed by Evert Hoek and E. T. Brown in 1980 for the design of underground excavations. In 1988, the criterion was extended for applicability to slope stability and surface excavation problems. An update of the criterion was presented in 2002 that included improvements in the correlation between the mod… Nettet27. apr. 2015 · 本文结合崇礼紫金矿的工程实践,采用经验类比法中的oek-Brown强度准则确定矿岩的岩体力学参数。 1岩体力学参数计算的基本理论HoekBrown强度准则是Hoek … http://qikan.cqvip.com/Qikan/Article/Detail?id=666107010 gold paw series stretch fleece