1) roof coal caving
顶煤垮落
2) the pace of top coal collapsing initially
顶煤初次垮落步距
1.
Through observing the practical mine pressure of Changgou mine's working face,including the pace of top coal collapsing initially,the pace of direct roof rock collapsing initially,the pace of basic top pressing initially and its intensity,and the pace of the basic top pressing periodically and its intensity,the paper has researched the rule of stope's mine pressure.
对长沟煤矿工作面进行了实际矿压观测,包括顶煤初次垮落步距、直接顶岩层初次垮落步距、基本顶初次来压步距及其来压强度、基本顶周期来压步距及其来压强度,分析研究了采场矿压规律。
3) 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。
4) roof control by caving
垮落控顶
5) main roof collapse
老顶垮落
6) 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。
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