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- cave roof stability 顶板稳定性
- 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;
- The roof is dangerous and could cave in at any time. 屋顶很危险，任何时候都会坍塌。
- 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。
- Because the increase of mining height in fully-mechinzed coal winning caving roof,it brings convenient and both brings the changing of rock rationlations. 大采高综放工作面由于机采高度的加大,在给工作面生产带来便利的同时,也带来支架与围岩关系的变化。
- FUZZY METHOD FOR THE STABILITY ANALYSIS OF CAVE ROOF UNDER PILE TIP IN KARST REGION 桥梁基桩桩端溶洞顶板稳定性的模糊分析研究
- 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。
- A hermit used to live in the cave. 一位隐士曾经住在那个山洞里。
- We kindled a firebrand in the cave. 我们在山洞里点燃火把。
- A mouse ran out from the dark orifice of the cave. 一只老鼠从黑暗的洞口跑出。
- The roof of the old house will cave in any time. 这所老房子的屋顶随时会塌下来。
- Seen from within, the cave looked larger. 从内部看，那个地洞显得更大。
- The stone made a dent in the roof of my car. 我的汽车顶让石头砸了个坑。
