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- A new method to evaluate roof stability is put forward based on electromagnetic emission(EME) technology. 现场应用实践表明,采掘工序对电磁辐射监测信号有微弱影响;
- Pre-tensioned bolts support is an effective way to improve joint roof stability. 预应力锚杆支护,是提高煤巷节理顶板稳定性的有效方法。
- The joints investigation of mined-out areas shows that structure surface is dominative factor of roof stability of mined-out area in Jiaguo Mine. 夹沟矿采空区的节理调查表明,结构面是夹沟矿采空区顶板稳定性的主控因素。
- Analysis and control on roof stability of rock-salt cavity are very important to ensure safety and benefit in production, build and use of repertory of rock salt cavity. 摘要岩盐水溶开采溶腔顶板稳定性及其控制的研究对保证卤井的安全生产和生产效益,对岩盐溶腔储备库的建造和使用都具有十分重要的意义。
- 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]
- For the tip-to-face roof stability, chock-fram type powered support only be applied to hard top-coal, shield-type powered support and chock-shield-type powered support can be applied to three top-coals. 通过分析,为保证端面顶板稳定,支撑式液压支架仅适用于顶煤为硬煤的条件下,掩护式和支撑掩护式支架在三种顶煤条件下均可以适用。
- By using UDEC program to simulate the roof stability in face area under different top coal in fully-mechanized mining with top coal caving, simulated model is founded, simulated projects are designed and mechanical parameters are set. 运用UDEC数值模拟程序,以不同顶煤条件下的综放开采端面顶板稳定性模拟为例,建立了数值模型、设计了计算方案、设定了力学参数;
- Discrete element method is used to analyze the roof stability in accordance with the variation of its loading, rock frictional angle, bolt spacing, rock properties and bolt orientation. 采用离散单元法,分析了当荷载、岩体的摩擦角、锚杆间距、锚杆方向和岩体的性质变化时,顶板的稳定性。
- She and I can't live under the same roof. 她和我不能住在一起。
- Room-and-pillar method is used for mining in most gypsum mines,and a top gypsum layer with a certain thickness in stope is reserved to keep the roof stabilization of stope. 大多数石膏矿山采用房柱法开采,通过在采场中保留一定厚度的石膏层来维护顶板的稳定性,护顶层是影响采空区稳定性的重要因素之一。
- The stone made a dent in the roof of my car. 我的汽车顶让石头砸了个坑。
- Snipers shot at the invaders from the roof tops. 狙击手从房顶上向侵略者射击。
- The rain water drips from the roof. 雨水从屋顶滴下来。
- During the gale roof tiles came hurtling down. 在暴风中屋顶的瓦片哗啦啦地落了下来。
- Can you shoot up at the bird on the roof? 你能射中房顶上的那只鸟吗?
- The pillars have to support the weight of the roof. 这些柱子须承受屋顶的重量。
- The rain drip down from a leak in the roof. 雨水从屋顶的裂缝中滴漏下来。
- The rain is leaking in large drop through the roof. 雨正大滴大滴地从屋顶漏下来。
- The roof slopes towards the back of the house. 屋顶向屋子的背面倾斜着。
- The roof of our house is covered by shingles. 我家的屋顶是用木瓦铺的。