Discrete element method is used to analyze the roof stability in accordance with the variation of its loading, rock frictional Angle, bolt spacing, rock properties and bolt orientation.
采用离散单元法，分析了当荷载、岩体的摩擦角、锚杆间距、锚杆方向和岩体的性质变化时，顶板的稳定性。
The variation rule of the primary dendritic spacing in the casting blanks and the effect of the bulge size on dendritic spacing were studied.
探讨了铸坯中一次枝晶间距的变化规律及其“鼓肚”量对枝晶间距的影响。
The test results indicated that the variation of the spacing between propeller and rudder bulb has obvious effect on propeller open water efficiency.
试验结果表明，桨、舵球间距的变化对螺旋桨敞水效率的影响是明显的。
The test results indicated that the variation of the spacing between propeller and rudder bulb has obvious effect on propeller open water efficiency.
试验结果表明，桨、舵球间距的变化对螺旋桨敞水效率的影响是明显的。
应用推荐