broken seam

常見例句

This paper approves the importance in producing minimum vibration energy during the broken of stiff sandstone roof in working of stress releasing seams by caving method.
論文證實(shí)了用垮落法開采卸壓層使堅(jiān)硬砂巖頂板折斷時(shí)產(chǎn)生的振動能為最小的要義。
On the basis of industry test, this paper analyses mining feasibility of applying roadway caving method and caving broken mechanism in high gas steeply indined medium coal seams.
在工業(yè)性試驗(yàn)的基礎(chǔ)上，分析了在高瓦斯急傾斜中厚煤層中應(yīng)用巷道放頂煤法開采的可行性和頂煤的破碎機(jī)理。