Accordingly, the new design method of anchor cable parameters applying to thick soft immediateroof is proposed.
提出了基于厚层软弱直接顶的新的锚索参数设计方法。
2
The increase in mining height makes the weighting of immediateroof become more violently, which requires that the support strength should increase accordingly.
由于采高加大使基本顶来压更加强烈，支架的支护强度更要加大。
3
Based on field observations and theoretical analyses, the characteristic of periodic caving of immediateroof and main roof in a room and pillar system was analyzed.