1) tight caving roof
难放顶板
1.
,a feasible way was found out on the management side of the strong and tight caving roofs.
七台河矿业精煤集团公司龙湖煤矿在坚硬、难放顶板的管理方面,摸索出一条可行的途径,取得了较好的效果,实现了安全放顶,为煤矿生产提供了很好的经验。
2) difficult caving roof
难垮落顶板
1.
Based on abroad difficult caving roof controling technology,this paper conclude and sumed up Russia、Poland and India and hope this can help the zone which excist difficult caving roof in our country.
难垮落顶板控制是采矿学研究的重要组成部分,在综合国外难垮落顶板控制技术的基础上,文章针对难垮落顶板控制技术,对前苏联、波兰和印度三个国家进行了归纳、总结和概述,希望对国内存在难垮落顶板的矿区提供参考和借鉴。
3) massive diffcult-caving roof
整体难冒顶板
4) roof
[英][ru:f] [美][ruf]
难放
1.
Efficient control of strong and difficult collasp roof;
坚硬难放顶板的有效控制
5) top-collapsing
放顶
1.
The distribution characteristics of initial rock stress in the tectonic stress type mine is analyzed first in the paper,and numerical simulating analysis is used to make analysis of the top-collapsing and failure forms of roof rocks at the western part of Chengchao Iron Mine,which could be theoretical basis to forecast and control the underground roof accidents.
本文首先分析了构造应力型矿山的地应力分布特点,然后对程潮铁矿西区深部开采中,放顶及开采对顶板围岩破坏形式进行了数值模拟,为矿山地压监测和顶板稳定防护提供了理论依据。
2.
Finite element method is used to make an analysis of the underground stress redistribution at the western part of Chengchao Iron Mine during top-collapsing process, and a theoretical basis has been provided to determine correct sequence of caving and forecast and control the underground stress.
采用有限单元法对程潮铁矿西区放顶过程中地压重新分布的规律进行分析,为矿山正确地确定回采顺序和对地压进行预测、管理提供了理论依据。
6) top roof and top coal
顶板顶煤
补充资料：松垮垮
1.散漫;涣散。
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