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- Technology and control of first roof caving in coal working face 采煤工作面初次放顶的技术与管理
- Practice of first roof caving technology at comprehensive mechanical mining face in steep thick coal seam 急倾斜特厚煤层综放工作面超段高初次放顶的实践
- first roof caving 直接顶初次垮落
- With the roof caving in, there were an increasing number of desertions. 由于大势已去,逃兵的人数日益增多。
- From the actual condition, the method combining the analysis of roof caving distan... 矿压显现强烈,且受煤柱回收顺序的影响。
- Xieyi Coal Mine used the roof caving technology of cantilever support to realize high effective and safe production,which obtianed good effect. 谢一矿采用悬移支架放顶煤采煤方法,实现了高产高效安全生产,取得了较好的效果。
- The destable of other similar support as wellas the sliding roof beam sapport, may be taken place in roof caving workface. 认为在放顶煤工作面，不仅滑移顶梁支架会失稳，其它类似支架也可能发生失稳。
- We also introduced statistical way to analyze the strata in the initial roof caving and carried out reasonable classification. 采用统计学的方法进行了矿压分析和总结,根据初次放顶顶板情况进行了合理分类。
- This paper analyzes the success application influence factors about the roof caving technology of cantilever support and summarized it's main factors. 对影响悬移支架放顶煤技术成功应用因素进行了系统分析,并总结出了其主要影响因素。
- The loci of plastic hinge line and the maximum load during first roof weighting are determined by using kinematical method, and the minimum span of roof key stratum is derived. 利用机动法确定了老顶岩板初次来压时载荷的上限值和塑铰线的位置,得到了顶板岩体关键层的最小破断跨距。
- This paper introduces the design of light-duty roof caving coal hydraulic support equipped with flat tramcar and transport ation on ground and under ground. 介绍轻型放顶煤液压支架(下文简称轻放支架)配套平板车的设计过程及轻放支架在煤矿地面、井下的运输过程。
- The Ion of plastic hinge line and the maximum load during first roof weighting are determined by using kinematical method, and the minimum span of roof key stratum is derived. 利用机动法确定了老顶岩板初次来压时载荷的上限值和塑铰线的位置，得到了顶板岩体关键层的最小破断跨距。
- Simultaneously, the gas control in roof caving and fully mechanized mining is the unsubstantial aspect of prevention measures for gas disasters in all over the world. 同时,放顶煤综采工作面的瓦斯治理也是世界各国煤矿瓦斯灾害防治技术的薄弱环节。
- One wall of the temple hospital crumbled, the roof caved in. 这个小庙医院的一堵墙倒塌了，屋顶陷下了。
- Put forward redistribution of stress in the mining area and Domino effect caused by unstability of coal pillar underground, resulting in sudden roof caving in the gob and surface subsidence. 提出了采场内煤柱失稳破坏引起采场应力重新分布，出现煤柱群连续失稳破坏的多米诺效应，从而导致采空区顶板大面积突然垮落和地表整体塌陷。
- Bricks had fallen and then the roof caved in, pinning him under the debris. 砖块开始掉落，然后屋顶坍塌了，把他压在了碎片底下。
- When did the roof cave in? 屋顶是什么时候坍塌的?
- When did the roof cave in ? 屋顶是什么时候坍塌的?
- More than 100 inches of snow has fallen in parts of Oswego County.Some residents are concerned about their roofs caving in. 奥斯威戈县部分地区积雪已经超过100英尺，一些居民非常担忧房顶会下陷。
- Leaving her first job was a watershed in her life. 辞去她的第一份工作是她生活中的一个转折点。
