steep coal-seam
常见例句
- There are some problems on pillar mining of rock cross-cut in steep coal seam, such as bad job environment, high working intensity, low coal recovery ratio etc.
急倾斜煤层石门煤柱开采存在作业环境差、劳动强度大、煤炭回收率低等问题。 - First, based on similar material model test, top coal cave-in characters in steep and thick seam were studied as well as failure law of main roof and features of surface subsiding.
首先利用相似模拟实验研究了急斜特厚煤层顶煤的冒落特征、顶板的破坏规律，以及地表下沉的特点。 返回 steep coal-seam