1) soft bottom and broken roof
软底碎顶
3) weak friable coal roadway
松软破碎煤顶巷道
4) soft bottom
软底
1.
The mining practice is introduced in the fully mechanized caving coal face of large in clination,hard roof,soft coal,soft bottom and thinck coal bed.
介绍了新疆焦煤集团主焦煤公司在大倾角坚硬顶板、软煤、软底较薄厚煤层综采放顶煤的开采经验,论述了开采工艺特点及技术措施。
5) broken roof
破碎顶板
1.
Prevention and control technology for spalling and failing of high inclined broken roof in fully mechanized mining face;
综采工作面大倾角破碎顶板片帮冒顶防治技术
2.
Research on broken roof consolidation technology in coal ming face;
采煤工作面破碎顶板加固技术研究
3.
Mechanism and project practices on broken roof control with wood bolt in fully mechanized coal mining face;
木锚杆控制综采面破碎顶板的机理及工程实践
6) roof broken
顶板破碎
1.
Cause analysis on roof broken in mine gateway retained for next sublevel in Xinghua Mine as well as prevention and control;
杏花煤矿沿空留巷顶板破碎原因分析及其防治
补充资料：摧碎佛顶
【摧碎佛顶】
（菩萨）佛顶尊之一。(参见：佛顶尊)
（菩萨）佛顶尊之一。(参见：佛顶尊)
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