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天然裂隙
相关语句
  natural fracture
     AN EXPERIMENTAL STUDY ON THE PERMEABILITY LAWOF NATURAL FRACTURE UNDER 3D STRESSES
     三维应力作用下天然裂隙渗流规律的实验研究
短句来源
     Application of Gaussian Curvature Method in Forecasting Natural Fracture Zones in Coal Seam
     运用高斯曲率法预测煤层天然裂隙发育区
短句来源
     The way and principle of Gaussian curvature method for forecasting natural fracture zones in coal seam are discussed.
     论述了高斯曲率法预测煤层天然裂隙发育区的基本原理和方法.
短句来源
     Based on the review of exploration history of coalbed methane(CBM)in this region,the main geological factors affecting the CBM recovery are discussed,such as the permeability of coal seam,the ancient and present stress fields,the development of natural fracture in coal seam and the present effective stress,as well as reservoir pressure,isotherm adsorption/desorption,gas saturability and velocity of gas diffusion and so on .
     在回顾该地区煤层气勘探历史的基础上,从影响煤层气开采的主要地质因素出发,论述了煤层渗透性及决定煤层渗透性的古、今地应力场特征、煤层天然裂隙发育程度、现今有效地应力大小以及地层压力、等温吸附/解吸特征、含气饱和程度及气体扩散速率等;
短句来源
     It is concluded that the Gaussian curvature method can reflect the shape variation of coal seam curvature, and the method is effective to forecast natural fracture zones in coal seam.
     分析表明,高斯曲率法可相对真实地反映煤层曲面形态变化,用该方法预测煤层天然裂隙发育区是切实可行的.
短句来源
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  “天然裂隙”译为未确定词的双语例句
     Analytical model for the progressive deformation of natural fissured slopes
     天然裂隙土坡渐进变形解析
短句来源
     On the basis of dual-media theory, two-dimensional models of water flow and pollutant migration are established for natural fractural systems both in their fracture domain and porous rock mass domain.
     本文用双重介质理论,在天然裂隙系统中对其裂隙域和孔隙岩块域建立了二维水流和污染质运移模型。
短句来源
     As for the main coal reservoirs of the lower Permian Shanxi Formation in the central-southern Qinshui basin, the permeability gradient of coal reservoirs tends to increase in exponential fanction and the pressure gradient to rise in logarithmic function with the increase of the principal stress difference σ1-σ3 of modern tectonic stress field, which is predominantly controlled by the correlation between the main stress direction and the preferentially developed direction of natural fissures in coal reservoirs.
     山西沁水盆地中、南部下二叠统山西组主煤储层现代构造应力场主应力差增大,煤储层渗透率梯度呈指数形式增长,煤储层压力梯度呈对数增长,这种规律主要受控于现代构造应力场主应力方向与煤储层天然裂隙优势发育方向之间的相互关系。
短句来源
     Cleats are the endogenetic fracture systems which are widely distributed in the coal bed and are of great significance for the coal-bed gas to be produced,being the natural fractures formed by desiccation,coalification,lithification and tectonic force.
     割理是广泛存在于煤层中对煤层气的产出具有重要意义的内生裂隙系统 ,是煤层经过干缩作用、煤化作用、岩化作用和构造压力等各种过程形成的天然裂隙
短句来源
     The tectonic stress affects coal reservoir substantially through controlling the open-close degree of the fissures in coal reservoir.
     构造应力实质上是通过对天然裂隙开合程度的控制而对煤储层渗透率施加影响。
短句来源
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  相似匹配句对
     Analytical model for the progressive deformation of natural fissured slopes
     天然裂隙土坡渐进变形解析
短句来源
     Study on Fracture Seepage in the Imitative Nature Roke
     仿天然岩体裂隙渗流的实验研究
短句来源
     Natural Seasoning
     天然调味料
短句来源
     Natural Slate
     天然板石
短句来源
     Slit Lamps
     裂隙
短句来源
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  intrinsic fracture
A fracture criterion based on finite extension strain energy release rate, is proposed to capture the intrinsic fracture toughness.
      
Extrapolation of fracture energies to zero additive or porosity levels, as well as analysis of CVD Si3N4 all indicate an intrinsic fracture energy of 20-30J m-2.
      
A basic statistical fracture description for the intrinsic fracture of whiskers was derived, which predicts a plateau in the intrinsic whisker strength.
      
Prediction of intrinsic fracture toughness for brittle materials from the apparent toughness of notched-crack specimen
      
In this investigation, fracture process zone model is used to establish a new relationship to predict the intrinsic fracture toughness from the apparent fracture toughness of a notched-crack specimen.
      
更多          
  natural fracture
A stochastic approach is commonly used to generate a synthetic fracture network from the statistics measured at a natural fracture network.
      
The approach presented herein is able to incorporate the structures found in a natural fracture network into the synthetic fracture network.
      
A much better understanding of the physics of fluid flow in a natural fracture from a sample of granite has been obtained from metal casts of the complex topography of the surfaces of the fracture as it is subjected to normal stresses up to 85 MPa.
      
Effect of induced fracturing based on a natural fracture system in a dimension stone quarry in the Offerdal Nappe, Sweden
      
Little consensus exists on how best to analyze natural fracture spacings and their sequences.
      
更多          


In this Paper the mechanical tests of hard coal samples of Datong coalfield were carried out by using the stiff loading system, and wire strain gages and the microcracks were observed by scanning electron microscope. The results of testing showed that there were many natural microcracks in the coal samples, which developed along their lengths with the increase of the compression stress. When the stress increased to a given level, new cracks occurred in the samples. The relationship between the stress and strain...

In this Paper the mechanical tests of hard coal samples of Datong coalfield were carried out by using the stiff loading system, and wire strain gages and the microcracks were observed by scanning electron microscope. The results of testing showed that there were many natural microcracks in the coal samples, which developed along their lengths with the increase of the compression stress. When the stress increased to a given level, new cracks occurred in the samples. The relationship between the stress and strain was nonlinear. Before reaching the stress peak, the total deformation included mainly elastic deformation and some residual deformation and the latter was represented by closure of the cracks when being compressed. A mechanical model is proposed, which can simulate the nonlinear deformation of coal,the elastic deformation, the residual deformation and the relationship between the stress and strain after the stress peak.

本文利用刚性加载系统、扫描电子显微镜及电阻应变仪等设备,对大同硬煤试样作了力学试验及微观裂隙观察。试验结果说明,煤内部存在大量天然裂隙,在压力作用下,裂隙沿长度方向发展。当应力增加到某一定值以后,产生新的裂隙。煤的变形呈非线性,包括大部分可逆变形及小部分不可恢复的残余变形,后者表现为裂隙受压闭合。文中提出一种模拟煤的非线性变形、可逆变形、残余变形及应力峰值以后的应力一应变关系的力学模型。

On the basis of dual-media theory, two-dimensional models of water flow and pollutant migration are established for natural fractural systems both in their fracture domain and porous rock mass domain.Expression formulae and calculation methods of the coupling term(r)are discussed separately for cases when the rock mass is of parallelepiped shape, elliptic cylinder shape or irregular shape. Quantitative analyses are made separately for the control and influence of factors like flow speed, diffusivity and porosity...

On the basis of dual-media theory, two-dimensional models of water flow and pollutant migration are established for natural fractural systems both in their fracture domain and porous rock mass domain.Expression formulae and calculation methods of the coupling term(r)are discussed separately for cases when the rock mass is of parallelepiped shape, elliptic cylinder shape or irregular shape. Quantitative analyses are made separately for the control and influence of factors like flow speed, diffusivity and porosity on pollutant migration. Finally, the migration of Cl~- ions in a karstic aquifer of about 85km~2 area in the eastern suburb of Jinan city is simulated, in which rather satisfactory results are obtained.

本文用双重介质理论,在天然裂隙系统中对其裂隙域和孔隙岩块域建立了二维水流和污染质运移模型。讨论了岩块为斜方体、椭园柱体和任意不规则几何形态条件下,耦合项(Γ)的表达式及计算方法。分别对流速、弥散度、孔隙度等因素对污染质运移的控制和影响进行了定量分析。最后,模拟了济南东郊约85km~2岩溶含水层中Cl~-离子的运移情况,取得了比较满意的结果。

One of the important reasons that obstruct the application of dual-porosity model is the estimating of parameters in porous blocks and fractures.A set of new equations has been develooed for modeling groundwater flow in dual-porosity aquifers at drawdown and slug conditions, respectively. The transmissivities and storage coefficients in fractures and porous blocks can be determined based on the solutions of the equations.Procedure for estimating the parameters is outlined by using a drawdown test in a karst...

One of the important reasons that obstruct the application of dual-porosity model is the estimating of parameters in porous blocks and fractures.A set of new equations has been develooed for modeling groundwater flow in dual-porosity aquifers at drawdown and slug conditions, respectively. The transmissivities and storage coefficients in fractures and porous blocks can be determined based on the solutions of the equations.Procedure for estimating the parameters is outlined by using a drawdown test in a karst aquifer which has the characters of dual-porosity.

双重介质模型能较好地刻画天然裂隙含水层的非均质性及液体流动和溶质迁移特征。在石油开采、核废物处置安全评价和环境水文地质等方面受到广泛重视。但是,双重介质模型的实际应用远远落后于其理论发展。其原因除了双重介质模型复杂、计算工作量大以外,模型参数确定的理论和测试方法很不完善,难以取得两套较客观的模型参数是另一重要原因。本文就双重介质含水层参数的确定问题,从其介质特征和水流运动特征入手,探讨了双重介质含水层中抽水和注水条件下的井流动力学方程及其求解方法,并讨论了其适用条件及存在的问题,最后,用实际资料说明了求参过程,检验了公式。

 
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