1) hard roof management
坚硬顶板管理
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) 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。
6) 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
补充资料：综采放顶煤
综采放顶煤：厚煤层煤炭开采技术之一。把原来分层开采的煤炭，一次采完。方法是，在煤层底部按传统方法开采，使上面的煤炭在矿压的作用下，自动落下来。
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