1) medium hard coal
中硬煤
1.
Through the crack test of big medium hard coal samples from Wangzhang Mine on real triaxial test machine , the fundamental properties of strength and deformation are obtained and the crack evolutionary way is discussed .
在真三轴压力机上通过对王庄矿中硬煤大煤样的压裂实验 ,得出了中硬煤在强度、变形方面的基本力学特性 ,探讨了中硬煤的裂隙演化过程 ,即裂隙演化经历扩展、加密、再扩展和再加密等过
2) medium-hard thick seam
"中硬"厚煤层
3) medium hard coal
中等硬度煤
4) 20 m very thick and medium hard seam
20m特厚中硬煤层
1.
of the fully-mechanized sub-level caving full-seam mining with high bottom cutting height for the 20 m very thick and medium hard seam have been studied by 1∶30 physical simulation.
研究结果表明:(1)底层大采高综放全厚开采20m特厚中硬煤层,在技术上是可行的。
6) hard plough
硬煤刨煤机
补充资料：硬煤
1.方言。即无烟煤。
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