Analysis on the mechanism of the face-contacted blocks structure in overlying strata above the longwall face;
采场上覆岩层面接触块体结构的力学机理分析
Analysis on the damage zone of overlying strata and safety layer distance on the upward mining above the longwall goaf
长壁开采上覆岩层损伤范围及上行开采的层间距分析
Based on the experiment with similar material,the laws of the extra subsidence on the surface and the stress vary inside overlying strata by newly increased load on the surface above worked-out area formed by fully mined and partial mined were researched.
通过相似材料模拟实验,研究了全部开采和部分开采条件下的采空区在地表新增荷载后,地表附加沉降和采空区上覆岩层内应力的变化规律。
Underground coal seam mining,stope roof caving,overburden subsidence,destruction and even surface settlement is a entire process,a unified system.
通过比值法、"三带"判别法、围岩平衡法、数理统计法对七五煤矿下组煤上行开采的可行性进行了研究论证,得知上行开采是可行的;为上行开采的上覆岩层运动规律理论分析与可行性研究论证提供了重要经验和借鉴。
The casing deformation caused by sand production of unconsolidated sandstones and caving of the overburden is studied .
以东濮凹陷WZ油田历年井况大调查套管损坏资料为依据,在对出砂油井套管损坏形态、层位与射孔状况、岩石性质等因素进行综合分析基础上,对疏松砂岩出砂、上覆岩层坍塌等主要方面导致的套管受力变形进行研究,为探讨及防治措施提供依据。
2 to conquer the disadvantages existed in the construction and to ensure construction safety and progress,summarizes characteristics and notices of subsurface excavation construction under geological condition of soft upper coating,and gains some useful experience.
介绍了襄渝二线铁路胡安段XYS-02标段新砦沟隧道在现场实际施工中运用明洞暗做施工工艺,克服施工中客观存在的不利因素,确保施工安全和进度的具体运用实例,总结了在软弱薄上覆层地质条件下的暗挖施工特点和注意事项,得出了有益的经验结论。
Study on Failure Mechanism and Support Timing of Soft Rock Roadway with Overlying Aquifer
上覆含水层软岩巷道破坏机制及支护时机研究
Research on Numerical Simulation of Overlying Strata Broken Rule of Mining Coal-seam under Aquifer
含水层下煤层开采覆岩破坏规律数值模拟研究
The water filmed over with ice.
水面上被一层薄冰覆盖着。
Numerical simulation study on the damage rule of overlying strata in mining under water bearing soft strata
含水松散层下煤层开采覆岩破坏规律的数值模拟研究
Study on Effects of Overlying Strata with Faultage on Transfer of Radon in the Process of Coal Oxidation
煤升温氧化过程中含断层上覆岩层对氡迁移影响的研究
they are only a thin film of water on the earth's surface.
它们仅仅是覆盖在地球表面上薄薄的一层水。
Sedimentary rock covering older crystalline layers.
沉淀岩覆在旧的水晶状层之上的沉积岩石
Predicting Study on Inrush of Sand and Overburden Failure of the Full Mechanized Top-coal Caving under Loosening Sandstone Aquifer in the Tie-bei Coal Mine;
铁北煤矿松软砂岩含水层下综放开采覆岩破坏及溃砂预测研究
Tide-induced Head Fluctuations in a Coastal Aquifer:Effects of Elastic Storage and Leakage of Submarine Outlet-capping;
考虑外覆淤泥层弹性储水率的滨海承压含水层系统中海潮引起的水头波动
Study on Behavior of Superincumbent Strata in Mining 45 Degree Coal Seams Using Horizontal Section Top-coal Caving;
45°煤层水平分段综放开采上覆岩层移动破坏规律研究
Aquifers have water contents over 30%.
含水层的水含过30％。
The foundation of gated-weir of the Wanbahe Power Station is located on Quaternary deposit which is soft.
湾坝河水电站闸基坐落在第四纪砂砾石覆盖层上，属于软基上建闸。
The ground was covered with snow.
地面上覆盖着一层积雪。
To cover with a layer, as of paint.
涂上覆盖一层，如油漆
a mist filmed over the mirror
镜子上覆盖着一层薄雾。
The car was thickly coated with dust.
汽车上覆盖着一层厚灰。
lining a surface or bearing with babbitt metal.
在上面覆盖一层合金。
There was a veil of mist over the mountains.
山上覆盖着一层薄雾。