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fractures control
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  断裂控制
     The basement fractures control environment geochemistry landscape and the features of element distribution,especially the Dingbian-Suide and Huachi-Datong fracture zones divide the Ordos Basin to two completely different landscape section of geochemistry and physiognomy;
     地基底断裂控制了盆地的环境地球化学景观和元素分布特征,尤其是定边-绥德断裂带和华池-大同断裂带将盆地分成两个截然不同的地球化学、地貌景观区;
短句来源
     The basement fractures control environment geochemistry landscape and the features of element distribution,and especially the Dingbian-Suide and Huachi-Datong fracture zones divide the Ordos Basin into two completely different landscape sections of geochemistry and physiognomy.
     盆地基底断裂控制了盆地的环境地球化学景观和元素分布特征,尤其是定边—绥德断裂带和华池—大同断裂带将盆地分成两个截然不同的地球化学、地貌景观区;
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  “fractures control”译为未确定词的双语例句
     the NW-trending fractures control rocks by the major fracture planes but control ores by the secondary fracture-planes;
     北西向断裂则主裂面控岩、次裂面控矿;
短句来源
     It has been pointed out that these measures for water plugging,replugging and well cementing may plug main water productive fractures,control water cut raising,and slow down the production decline.
     指出:针对不同情况采取的堵水、复堵、注水泥等措施可有效封堵主要出水裂缝,控制含水率上升,减缓产量递减;
短句来源
     It is indicated that fractures control on hydrocarbon reservoir formed condition of paleolake evolution,source rock maturation and hydrocarbon distribution,generation,expulsion,migration and accumulation,the relations between paleolake settling,sag filling and rate of fractures forming were studied in the Weixinan sag,Beibu Gulf Basin.
     通过分析涠西南凹陷古湖泊沉降、充填与其断裂发育、活动速率的关系,明确了不同次级断裂对凹陷古湖泊发育演化的控制程度以及对烃源岩的分布、成熟、生烃、排烃、聚集场所等成藏条件的控制。
短句来源
     Analysis of three wells in Mazhong Oilfield shows that lithology controls fracture development and fractures control oil-gas distributions under the condition of the same tectonic stress.
     从马中油田 3口井的分析得出 ,在同一构造应力条件下 ,岩性控制裂缝的发育 ,裂缝控制油气的分布。
短句来源
     Structures or structural belts accompanying with the fractures control the distribution of the gas reservoir, whose main composition is condensate gas.
     该区气藏气体成分主要为凝析气,气藏分布受与断裂伴生的构造或构造带控制。
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  相似匹配句对
     U. in control.
     U.
短句来源
     C:Control;
     C组(假手术组);
短句来源
     Types of fractures and control of the hazards of them to opencast mining
     露采生产工程岩体裂缝类型与危害控制
短句来源
     Analysis and Control of Fractures in PC Core Plain Beams
     PC空心板梁的裂缝分析与防治
短句来源
     Intertrochanteric fractures
     股骨转子间骨折
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  fractures control
The stochastic continuum approach obviates the need for detailed information about fracture geometry or assumptions about how individual fractures control flow and transport.
      
The integration of geomorphology and lineament studies reveal that shallow groundwater occurrence is controlled by geomorphological characteristics whereas faults/fractures control the yield of groundwater at intermediate depths.
      
He emphasized that current thinking is that faults and fractures control field locations and reservoir quality.
      


The influences of basic metal chemical composition,heat treatment conditions and welding parameters on the pressure vessel brittle fracture have been investigated.The fracture control analysis of vessel was performed with modern fracture mechanics.Many experimental tests confirmed that the pressure vessels fabricated according to our technical norms are safe and reliable in the service.

研究了诸如化学成分、热处理条件和焊接因素对压力容器脆性破坏的影响。以断裂力学为工具对容器进行了断裂控制分析,大量试验证实,按我们所提供的技术规范制造的压力容器,工作是安全的,性能是可靠的。

The"unsymmetrical effecf"caused by the unsymmetrical explosive loading in a borehole ( for example, extremely eccentric charge and slotted cartridge) is put forward and the influence of the unsymmetrical explosive loading on the initiation,propagation and the final distribution of cracks around the borehole in infinite rock mass is analysed in this paper. It is concluded that the cracks are first generated at the contact place between the charge and the borehole wall, and the rarefaction wave from the propagation...

The"unsymmetrical effecf"caused by the unsymmetrical explosive loading in a borehole ( for example, extremely eccentric charge and slotted cartridge) is put forward and the influence of the unsymmetrical explosive loading on the initiation,propagation and the final distribution of cracks around the borehole in infinite rock mass is analysed in this paper. It is concluded that the cracks are first generated at the contact place between the charge and the borehole wall, and the rarefaction wave from the propagation of the first initiated cracks restrains the initiation and extension of other cracks on the borehole wall, which follows the following necessary conditions:According to the principle of the J-integral, the authors have deduced the theorectical formula concerning the time taken by the initiation of dracks, and the calculated result shows a basical agreement with the dynamic photoelastic experimental result. Finally,the mechanism about the formulation of unsymmetrical loading associated with the slotted cartridg es is analysed, and the application of this new technique in fracture control is mentioned as well.

本文提出了炮孔中非对称爆炸载荷(如极限偏心装药和特殊药卷)产生的“非对称效应”,分析了这种非对称载荷对无限岩体中炮孔周围裂隙的生成,扩展和最终分布的影响。研究得出:在偏心装药时,在装药与炮孔壁接触面上首先生成裂隙,预先生成的裂隙引起的稀疏波对孔壁上其它方向上的裂纹的生成与扩展有限制作用,这一制约遵循下列必要条件: 根据J一积分原理导出了计算裂隙产生所需时间的理论公式,计算结果与动光弹试验结果基本吻合。 最后,分析了切缝药包爆炸产生非对称载荷的机理,介绍了这项新技术在断裂控制中的应用效果。 本文所提出的关于炮孔爆破中新的岩体断裂理论以及所得出的初步结论对于爆破破岩机理的研究和指导工程实践都具有重要意义。

In this paper, the transient response of a pair of radial cracks which are of equal length and notched symmetrically from a borehole, hole-line-shaped (HLS) crack, is discussed in case of normal tractions being suddenly applied to the wall pf the borehole and the surface of the crack, which comes from the approximatioe of the initiation of the HLS crack under dynamic loading, that is, the first phasn of fracture control.Due to the complexity of the boundary and the existance of the inertia term in the...

In this paper, the transient response of a pair of radial cracks which are of equal length and notched symmetrically from a borehole, hole-line-shaped (HLS) crack, is discussed in case of normal tractions being suddenly applied to the wall pf the borehole and the surface of the crack, which comes from the approximatioe of the initiation of the HLS crack under dynamic loading, that is, the first phasn of fracture control.Due to the complexity of the boundary and the existance of the inertia term in the dynamic equation, neither the integral transform for space veriable nor the conformal mapping can be applied to this kind of problems directly. But from Tweed's work for a crack notched from a circular hole in static case, we can get some inspiration. The problem can be solved by decomposition-superimposition-iteration (DSI)method in the following steps. First the initial-boundary value problem is changed into the boundary value problem by means of Laplace transformation. Next the solution region is decomposed into two simple regions, one is a circular hole, the other is a finite Line-shaped crack.The solutions of the decomposed problems can be obtained by using the separation of variables and the Fourier transform respectively. The displacement and the slress components are derived upon the super-imposition of the solutions. They have satisfied some conditions naturally. Then inserting them into the other conditions, the dual integral equations are obtained,where V(r, p) is a series. The coefficients in it can be determined from the borehole boundary conditions.The unknown function D(aaaaaaaaaaaaaaaaa, p) is included in these coefficients. To solve (1),V(r, p)is regarded as the free term temporarily, the predictor corrector method has been applied here- predicting V(r, p) in ( 1 ) to solve D(α, p), then making use of the borehole conditions to correct V(r, p), the corrected V(r, p) is inserted into ( 1 ) to solve D(α, p) again until the mstable V(t, p) is obtained. Thus ( 1 ) can be reduced to the standard Fredhol integral equation of the second kind.when the radius of the borehole approximates to zero, the equation is identical with Sih's solution for relevant problem of finite line-shaped crack in 1972. The solution of the equation ( 2 ) is got by iteration mentioned above and it leads to the Laplace transforms of the stress components, subsequently they are inverted by a combination of numerical means and an application of the Cagniard-DeHoop inversion technique. It has shown that the space distribution of the singular stress field of the crack discussed here is the same as Sih obtained, while the dynamic stress intensity factor k1,(t) reflects the affecting of the borehole. These are essential information in the application of the current theory of fracture mechnics, The numerical calculations demonstrate the feasibility of the DS1 method and the results provide the quantitative basis for us to simplify the practical problem, and make us fully understand the interaction of wave and the crack in this problem. The inferences from above results are in agreement .with others' experiments. Upon this the reasonable loading method is recommended. Moreover a number of theoretic extensions of the work and the ways to carry out the technique (fracture control) simply and economically in practice are proposed. Among these the most important one is that the DSI method can be extended to study the problem of the HLS crack moving at a constant velocity, which comes from the approximation of the propagation of the HLS crack under dynamic loading.

本文讨论由钻孔壁刻出的两个对称径向裂纹在孔壁及裂纹面上突加正压力作用下的瞬态响应,此问题来自于控制断裂。借助于叠加原理和积分交换方法,问题简化对偶积分方程,基于预测校正法的概念将孔壁边界条件对此方程的影响解耦,从而得到了第二类Fredholm积分方程,以迭代法和Cagniard-DeHoop反演技术求得解。结果表明在此裂端奇异场的空间分布与Sih 1972年就相应线状裂纹问题所得相同,而动态应力强度因子k_1(t)反映了孔的影响,当钻孔半径趋于零时解趋于Sih的解;并使得我们对本问题中波和裂纹的相互作用有了全面的了解,基于此提出了较为合理的加载方法,此外还提出了对本文工作的一系列理论推广以及简便和经济地应用控制断裂技术的方法。

 
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