1) 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。
2) roof caving
顶板垮落
1.
Using this model,we have simulated the roof caving characteristic and the stress distribution of surrounding rocks and analyzed the deformation feature of the surrounding rocks in the working face end.
02D数值模拟软件建立相应的分析模型,模拟了煤层开采过程中的顶板垮落和围岩应力分布特征,重点分析了工作面上下端头的围岩应力分布规律及变形特点;结合具体生产矿井的综采工作面现场情况,得出了综采工作面推进过程中的周期来压、采动影响范围和煤壁片帮等矿压显现特征,并针对开采中出现的问题提出了相应的安全防范措施。
3) Roof falling
顶板垮落
1.
Based on further analysis of the dynamic impact caused by the roof falling.
为了进一步研究采场顶板垮落冲击引起的暴风灾害,采用采场顶板动力冲击机理理论和数值模拟的方法,研究了暴风形成的机理。
4) roof falling over great extent
顶板大面积垮落
1.
The disaster of stope roof falling over great extent, happening in the coal face during the course of mining, brings about such comprehensive destruction as energy damage, load lash and cyclone damage.
采场顶板大面积垮落的灾害是在采矿过程中工作空间存在的一种包括能量破坏、动载冲击和飓风破坏的综合性矿山现象，造成的破坏非常大。
5) roof periodic caving
顶板周期垮落
6) large roof falling
大面积顶板垮落
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