The other part of the reefs might be covered by thrust blocks and overlying strata.
现今礁体部分暴露于地表，部分被推覆体或上覆地层覆盖。
From the Cretaceous to Tertiary, fault sealing built up with thickening of the overlying strata.
白垩纪至第三纪，随上覆地层增厚，断层封闭性增强。
There used to be igneous intrusions into coal measures and overlying strata in the Hanxing coalfield.
邯邢煤田煤系及其上覆地层中常有岩浆岩侵入体穿插。
The destruct height of overlying strata is linearly correlation with the compression rate of gangue backfilling.
覆岩破坏高度和矸石充填体压缩率成正线性相关。
Influences of overlying strata failure height of different exploitation methods, programs and geography terms are analyzed.
分析了不同开采方法及开采程序、不同地质条件对覆岩破坏高度的影响。
In different engineering geological conditions, the construction process, the migration of overlying strata have different rules.
在不同工程地质条件下，施工过程中覆岩具有不同的运移规律。
Deformation pattern of rocks in earth's crust is effected by tectonic stress, fluid pressure and gravity of the overlying strata.
地壳中岩石的变形模式受构造应力、流体压力和上覆岩层重力共同作用的影响。
There is a negative correlation in terms of the complexity of the micro-crack between the coal and overlying strata has in the same position.
同一位置的煤层与岩层的微观裂隙复杂程度呈负相关。
Based on the key stratum theory, the structure characteristics and movement laws of overlying strata with different mining height are studied.
运用关键层理论研究了采场覆岩结构特征及运动规律。
The numerical results show that the displacement of the overlying strata is nonlinear, and it gets smaller with the increase of the roof height.
数值模拟结果显示上覆岩层的移动是非线性的，上覆岩层的沉降位移随着距离采场顶板的高度增大而减小。
According to simulation results, along with working face being advanced, the failure processes and features, and weighting of overlying strata, were analyzed.
并根据模拟结果，分析了随着工作面采动和推进，上覆岩层的破断过程、特征与来压特点。
The major pay bed is low permeable ultra dense sandstone. Its permeability and pore throat texture are very sensitive to the net pressure of overlying strata.
主要产层为低渗透超致密砂岩，其渗透率和孔喉结构对上覆地层净压力很敏感。
Overlying strata spatial structures of longwall formed by working faces that is mined and four sides are substance coal are named "o" letter type spatial structures.
我们把一面采空(四周为实体煤)形成的采场覆岩空间结构称为“O”型空间结构。
The overlying strata of the coal bed roof are dominated by sedimentary rocks such as shale, sand stone and limestone, whose physical and mechanic properties differ greatly.
煤层顶板覆岩一般以页岩、砂岩、灰岩等沉积岩为主，其物理力学性质差异很大。
After analyzed the mine geological and hydrogeological conditions of the mine area, considered that the mine water filling source is stratifugic water from overlying strata.
通过分析该矿区的矿井地质及水文地质条件，认为矿井充水水源为上覆地层的离层水。
The comprehensive study of complex effect of key stratum plays an important role in understanding control mechanism of key stratum in overlying strata within mining influence.
研究关键层的复合效应对深入揭示关键层在采动覆岩中的控制机理具有重要推动作用。
Later on, because of folding, it was uplifted, the overlying strata suffered from erosion, the favorable crystallizing conditions for calcites and mountain crystals were formed.
之后为褶皱上升，使上覆地层遭受剥蚀，形成有利于方解石和水晶的结晶条件。
Modelling tests are made to study problems of supporting state of coal pillar together with characteristics of overlying strata and surface movement in partial mining in this paper.
本文通过相似材料模型试验探讨了条带法开采中条带煤柱的支撑状态及覆岩和地表移动问题。
The existence of a shear slip zone is proved, and the overlying strata are divided into different zones according to the rules of strata movement and characteristics of rock failure.
证实了剪切滑移区的存在，并按覆岩运动规律与破坏特征对围岩进行了分区。
However, the initial working at this mine did not experience strata control problem because the void remained, relatively, small resulting less disturbance in the intact overlying strata.
然而，在这个矿井的初步工作没有岩层控制的问题，因为经验的空白依然存在，相对而言，造成不小的扰动完整的覆层。
On the basis of key rock strata theory, transferring rock beam structure and the law of the overlying strata displacement and the surface subsidence theory, we deduced offset error formula.
以关键层理论、传递岩梁理论以及采场上覆岩层及地表移动规律理论为基础，推导出岩梁抗弯刚度的误差补偿公式。
In the local or global movement of rock mass under mining, overlying strata play a key role. The overlying strata movement is a complicated space-time process and has time-dependent feature.
上覆岩层对采动岩体活动全部或局部起决定性作用，上覆岩层运动是一个复杂的时空过程，具有时效性。
Also, the crack extension time decreases with the increase of material creep index and the loading of overlying strata rock while it increases with the increase of tensile strength of roof rock.
断裂孕育时间随材料的蠕变指数、上覆岩层压力的增大而减小；裂隙扩展时间也随材料的蠕变指数、上覆岩层压力的增大而减小，但随岩石的抗拉强度增大而增加。
Concrete cutoff wall presents a bigger safety and reliability in aspects of the reinforcement of reservoirs' loss, and foundations' cutoff in large-medium hydropower stations' deep overlying strata.
混凝土防渗墙在水库出险加固、大中型水电站深厚覆盖层基础防渗等方面较其他处理方法有更大的安全性和可靠性。
A geological surface that separates younger overlying sedimentary strata from eroded igneous or metamorphic rocks and represents a large gap in the geologic record.
分隔较年轻的上覆沉积地层与火成岩或变质岩的侵蚀面的地质界面，在地质记录上代表一个大的间断。
It is a key for mine safe production to ensure the stability of overlying rock strata in stope.
确保采场上覆岩层稳定是矿井安全生产的关键。
During overlying rock strata being fractured, the surface gas drainage boreholes may be damaged due to ground movement.
在长壁工作面通过的过程中，地面垂直钻孔可能随岩层移动而发生破坏。
Oil shale always has the accompanying relationship with overlying sedimentary tuff or other tuffaceous strata.
油页岩常与上覆沉凝灰岩或其它凝灰质岩石呈伴生关系。
Oil shale always has the accompanying relationship with overlying sedimentary tuff or other tuffaceous strata.
油页岩常与上覆沉凝灰岩或其它凝灰质岩石呈伴生关系。
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