1) main roof stratum
老顶岩层
1.
The roof pressure pressed by the main roof stratum on the immediate roof is established by using the ratio of immediate roof thickness to mining height.
根据现场实测，采用统计回归与理论分析方法，对鸡西矿务局单体支柱工作面顶板压力计算方法进行了分析和研究，利用来高与直接顶厚度的比值确定老顶岩层作用在直接顶的压力，最后推导出较实用的顶板压力计算方法，并在鸡西进行了应用。
2) main roof
老顶岩梁
1.
Break of main roof ahead of workface and ground pressure;
采场老顶岩梁的超前破断与矿山压力
3) main roof block
老顶岩块
1.
Experiment study on the coefficients of friction and inserting of main roof block corner;
老顶岩块端角摩擦系数和挤压系数实验研究
4) roof strata
顶板岩层
1.
Dynamic events in roof strata-occurrence and prevention;
顶板岩层动力事件发生机理与防治方法
2.
Instability behavior for roof strata in shallow seam longwall mining;
浅埋煤层长壁开采顶板岩层的不稳定性态
3.
The instability of the gob roof will cause slow or catastrophic damage to the cover rock in strip mining, the instability and failure mechanism of the gob roof strata can be studied by catastrophic theory.
采空区顶板的失稳会导致条带开采覆岩系统缓慢或突变性的破坏,采用突变理论可以揭示采空区顶板岩层破坏失稳机理。
5) roof stratum
顶板岩层
1.
The effects of roof stratum\'s physical properties,geometry parameters and movement states on rock burst danger were analyzed by numerical simulation with UDEC4.
0对煤层上覆顶板岩层的物理、几何属性及运动状态对煤体冲击矿压危险性的影响规律进行了模拟研究。
2.
Aiming at the influence effects of roof stratum on rock burst,the research methods of physical simulation experiment in laboratory,UDEC 4.
针对顶板岩层对煤体冲击的影响作用机理,采用实验室物理模拟试验、UDEC 4。
6) key stratum of main roof
老顶关键层
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