1) roof-supporting seam
护顶矿层
2) bed top
矿层顶板
3) top leaf
护顶层
1.
Study on the optimization of stope structure parameters under the protection of top leaf;
护顶层保护下采场结构参数优化研究
4) breast mining method with roof bolting
锚杆护顶全面采矿法
5) contour map of seam roof
矿层顶板等高线图
6) roof support
护顶
1.
Simulating analysis of the mining of gentle-dip, medium-thickness and instable-roofed orebody and roof support of stope;
缓倾斜顶板不稳固中厚矿体开采模拟分析及采场护顶
补充资料：护顶
1.婴儿戴的一种保护头顶的帽子。
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