1) grade of the old roof
老顶分级
2) main roof
老顶
1.
The paper regards the main roof strata in uphill and downhill mining of an inclined longwall as a elastic plate.
本文将倾斜长壁仰斜、俯斜开采的老顶岩层视为倾斜弹性板。
2.
The theoretical calculation of first weighting interval of main roof and the utilization of measured data of roof weighting interval in practice for improving the accuracy of its calculation are both important to ground pressure control.
老顶初次来压步距的理论计算以及利用实测来压步距资料来改善理论计算的来压步距精度是矿压管理中的重要工作。
3.
On this paper the method of plate limit analysis is applied to the determination of two breakage lengths of main roof.
本文应用板的极限分析法求老顶的断裂步距,从而解决了按板模型周现有的方法不能计算老顶周期断裂步距的问题这种方法的另一个显著的优点是它不但适用于矩形采空区而且也适用于非矩形采空区。
3) classification jacking coefficient
分级顶进系数
4) coal mining roof
煤矿顶板分级
5) The gable holding such a window.
老虎窗的屋顶部分
补充资料：顶老
1.指妓女﹑歌妓。宋﹑元﹑明时的调侃之语。 2.指妓院中的一种行当。犹今云乌龟﹑捞毛之类。 3.指头，头顶。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条