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- main roof collapse 老顶垮落
- Props were used to prevent the roof collapsing. 用了一些支柱以防止屋顶塌落。
- The roof collapsed under the weight of the snow . 屋顶在积雪重压下塌陷。
- The roof collapsed under the weigh of the snow. 屋顶因积雪的重压而塌陷。
- The roof collapsed under the weight of the snow. 屋顶在积雪重压下塌陷。
- The roof collapsed under the weight of snow. 房顶在雪的重压下突然坍塌下来。
- Hundreds of rescuers in southern Germany are desperately searching Tuesday for survivors of a roof collapse at an ice-skating rink in Bavaria. 数百名救援人员星期二在德国南部的巴伐利亚的一处滑冰场竭尽全力搜寻屋顶塌陷事件幸存者。
- The paper regards the main roof strata in uphill and downhill mining of an inclined longwall as a elastic plate. 本文将倾斜长壁仰斜、俯斜开采的老顶岩层视为倾斜弹性板。当板的长短跨度之比＞2时，板的荷载主要由短跨边来承担。
- An example of applica-tion of this methed to the analysis of stope roof collapse mechanism in Laochang Tin Mine is given. 该法在老厂锡矿的应用较好地解释了该矿采场顶板的冒落机理。
- Moreover, in the weighting process of the main roof, the characteristics of ground pressure manifestation are all of "camelback" form. 在来压过程中,回采工作面的矿压显现特征量均呈“驼峰”型。
- Therefore, the location of terminal line of the coalface should be put at the place where main roof periodic weighting process has already done. 因此，工作面终采线的位置，应尽可能确定在老顶岩层周期来压完成之后。
- The length of the first coalface in a mining-district controls the distances of first weighting and periodic weighting of the main roof. 在采区范围内首采工作面的长度控制着老顶的初次来压步距和周期来压步距。
- The pillars gave way and a section of the roof collapsed. 这些立柱坍塌了，一部份屋顶坠落下来。
- The roof collapsed, showering us with dust and debris. 屋顶塌了下来，灰尘、碎片纷纷落在我们身上。
- Huang Q X, Qian M G, Shi P W.Structural analysis of main roof stability during periodic weighting in longwall face[J].Journal of China Coal Society, 1999,24(6): 581-585. [6]黄庆享;钱鸣高;石平五.;浅埋煤层采场老顶周期来压的结构分析[J]
- Part of the roof collapsed burying him under a pile of rubble. 屋顶的一部分倒塌了，把他埋在一堆碎石底下。
- The researches show that the main roof initial fracture process,when incline longwall being employed,has three types,and the calculation formula is given,wa also analyzed th... 同时分析了煤层倾角和顶板条件对老顶断裂和矿压显现的影响。
- Uh, the floors collapse, the roofs collapse - uh, at a greater speed than in the past. 哦，地板塌了，屋顶塌了-嗯，比过去老房子的坍塌速度更快。
- The position and state of the main roof above the terminal line of the coalface nearby the rises affect the magnitude of the peak abutment pressure and the difficult extent of the rise maintenance. 上山附近终采线上方老顶岩层的位态影响着煤柱支承压力的大小和上山维护的难易程度。因此,工作面终采线的位置,应尽可能确定在老顶岩层周期来压完成之后。
- He was helping to demolish an underground garage when part of the roof collapsed. 他当时正在帮忙拆除一个地下汽车库，屋顶的一部份突然倒塌。
