1) non-hard roof
非坚硬顶板
1.
As the exploit strength increasing, rock-burst may occur under the condition of non-hard roof.
即使是非坚硬顶板条件,当开采强度加大时,也将发生冲击地压灾害。
2) hard roof
坚硬顶板
1.
Numerical Simulation of hard roof processing step;
坚硬顶板处理步距的数值模拟
2.
Numerical simulation of moving features of hard roof with three-dimensional discrete element method and nonlinear dynamic analysis;
坚硬顶板运动特征的数值模拟及非线性动力学分析
3.
Numerical simulation study with 3DEC on impacted movement of hard roof in manless working face extraction;
无人工作面开采坚硬顶板冲击运动的3DEC数值模拟研究
3) hard top-coal(roof)
坚硬顶煤(板)
4) hard roof and hard floor
坚硬顶底板
5) Hard roof and hard seam
坚硬顶板与坚硬煤层
1.
Fully mechanized coal caving mining technology with conditions of hard roof and hard seam in Datong Mining Area;
大同矿区坚硬顶板与坚硬煤层条件下综放开采
6) compound hard roof
复合型坚硬顶板
1.
In view of the compound hard roof of Six picks the area,through carrying on the comprehensive servation and the mechanics analysis appeared to pressure appears of the working face production process.
针对复合型坚硬顶板的六采区,通过对工作面生产过程的矿压显现进行了全面观测和力学分析。
补充资料：非想非非想处天
1.佛教语。即三界中无色界第四天。此天没有欲望与物质﹐仅有微妙的思想。
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