您要查找的是不是：
- coal roof stability 煤层顶板稳定性
- 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]
- 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 application of seismic attribute technology to predict coal roof lithologic character was introduced. 介绍了应用地震属性技术预测煤层顶板岩性的方法。
- 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 study indicates that according to the formulae of combinatorial key stratum, coal roof weighting step in the 1203 face in Da-liu-ta mining is co the observation value. 结果表明，以该修正的组合关键层破断距公式计算的大柳塔1203工作面的初次来压步距与实测非常接近。
- 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。
- 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。
- 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。
- Test of low slicing with coal roof in thick seam 忻州窑矿厚煤煤层下分层留顶煤开采试验分析
- 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。
- Study of Main Roof Stability Druing First Weighting On Linxi Coal Mine 林西矿深部开采顶板初次来压规律相似模拟研究
- We need to replenish our stocks of coal. 我们需要再次补充煤的储备。
- She piled on more coal before the fire go out. 在火熄灭之前她又加上些煤。
- DYNAMIC ENGINEERING CLASSIFICATION OF STOPE ROOF STABILITY 采场顶板稳定性动态工程分类
- I add the coal on the flame continuously. 我不断朝火里添加煤炭。
- They are ventilating the sap of a coal mine. 他们正在使煤矿坑道通风。
- Prohibition was laid on the export of coal. 禁止煤炭输出。
