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fractures
相关语句
  裂缝
    THE CHARACTERISTICS AND CONTROLLING FACTORS OF SINIAN FRACTURES IN ZIYANG AREA
    资阳地区震旦系裂缝特征及控制因素初探
短句来源
    Detecting the formation fractures in Yancheng depression by analysing the four-component VSP data of S-wave source.
    利用横波源四分量VSP资料检测盐城凹陷地下裂缝
短句来源
    THE APPLICATION OF FRACTAL: THE QUANTITATIVE DESCRIPTION OFFEATURES OF FRACTURES
    分维的应用——定量描述裂缝发育程度
短句来源
    Application of the borehole-to surface electric potential image technique to monitoring hydraulic fractures of coalbed methane
    井地电位成像技术在煤层气水力压裂缝探测中的应用
短句来源
    THE MATHEMATIC MODEL RESEARCH OF COMPLICATED FRACTURES SYSTEM IN COALBED METHANE WELLS
    煤层气井复杂水力压裂裂缝模型研究
短句来源
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  断裂
    METHEMATICAL STATISTICS ANALYSIS OF METALLOGENIC ELEMENTS RELATED TO THE FRACTURES
    与断裂有关的成矿元素数理统计分析
短句来源
    Fractal Features of Fractures and Their Relation to Silver-Gold Mineralization in Southeast Guangxi
    桂东南地区断裂构造分形特征与金银成矿关系研究
短句来源
    The deep fractures of NE strike control the distribution of four granite bodies in the region;
    NE向深断裂控制了区内4个花岗岩体分布;
短句来源
    It is suggested that trapped fractures ore-beaing formed only when the ratio E1/E2 between the elastic modulus E1 of rocks at upper part and that E2 of rocks at lower part is smaller than compressive strength ratio Rc1/Rc2 between the rocks, i.e., E1/E2
    圈闭断裂形成必要条件是浅部地层岩石与深部地层岩石的弹性模量之比小于其两者岩石抗压强度的比值(即E1:E2< Rc1:Rc2)。
短句来源
    Through lithogeochemical surveying, the primary geochemical anomalies of elements W, Sn, Cu, Zn, As, B, F have been outlined in Shanhu W-Sn orefield, Changyingling-Longmenchong region. The primary halos are strictly controlled by two structural groups——NE and NW fractures.
    通过对珊瑚矿田长营岭-龙门冲地区岩石地球化学测量,圈定了该区W、Sn、Cu、Zn、As、B、F等元素异常,原生晕严格受NE和NW两组断裂控制。
短句来源
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  “fractures”译为未确定词的双语例句
    The Influence of Montmorillonite Filling in Fractures on the Stability of a Tunnel
    裂隙充填蒙脱石对巷道稳定性的影响
短句来源
    Study of features of distribution of overlaying stratum fractures caused by mining
    覆岩采动裂隙分布特征的研究
短句来源
    THE FRACTAL CHARACTERISTICS OF FRACTURES IN Ⅵ16—17COAL OF NO5 MINE AND ITS IMPLICATION
    平顶山五矿己_(16—17)煤裂隙分形特征及其研究意义
短句来源
    Physical model experiment of wave field characteristic relating to reservoir fractures
    储层裂隙波场特征物理摸型实验研究
短句来源
    The application study of complex analysis in detection of shear wave splitting due to vertical fractures
    用复分析检测垂直裂隙横波分裂的应用研究
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  fractures
The tough fractures on the surface of the PU/PVC composite sample following impact are quite obvious.
      
Stress centralization will, in turn, cause a lot of fractures and faults to develop, and ultimately, result in a gas chimney, which is a seismic smear zone beneath or above the reef flat.
      
A system of two nonlinear equations in partial derivatives, of the hyperbolic type, is obtained for the concentration of one of the liquids in fractures and blocks.
      
The latter problem may be formulated, for example, so as not to permit closure of the fractures in the bottom zone.
      
The equations of horizontal displacement of miscible fluids from thin fractured porous formations are derived with allowance for all three mechanisms of mass transfer between the blocks and the fractures.
      
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This article was written on the bases of observation data obtained from the course of several years of strata movement at the Fushun mining area. By making use of the method of interrelation analysis and the prineiple of least square method, linear equa-tions of displacement angle, border angle, fracture angle and maximum angle of draw in relation to dip of coal seams, under conditions of sand-flushing method for inclined seams of particularly great thickness have been derived. These equations for calculating...

This article was written on the bases of observation data obtained from the course of several years of strata movement at the Fushun mining area. By making use of the method of interrelation analysis and the prineiple of least square method, linear equa-tions of displacement angle, border angle, fracture angle and maximum angle of draw in relation to dip of coal seams, under conditions of sand-flushing method for inclined seams of particularly great thickness have been derived. These equations for calculating the above mentioned angles may be referred to in planning out new mining areas with the same or similar geological and mining conditions.

本文是根据抚顺矿区多年来的岩层移动观测资料编写的.用相关分析的方法和最小二乘法原理,解出了在倾斜特厚煤层水砂充填开采条件下的下山岩层移动角、边缘角、破坏角和最大下沉角与煤层倾角的线性方程式. 求算这些角值的方程式,可供在相同地质采矿条件下或类似此条件的新矿区参考.

This paper outlines some of the recent work of the rock mechanics group at Imperial College, London, in the application of rock mechanics principles to under- ground mining excavation design. Types of instability of underground excavations in rock are discussed and a flow chart setting out the steps involved in design is presented A new empirical strength criterion for jointed rock is discussed and its application illustrated for the case of rock fracture around square drives in a deep- level gold mine....

This paper outlines some of the recent work of the rock mechanics group at Imperial College, London, in the application of rock mechanics principles to under- ground mining excavation design. Types of instability of underground excavations in rock are discussed and a flow chart setting out the steps involved in design is presented A new empirical strength criterion for jointed rock is discussed and its application illustrated for the case of rock fracture around square drives in a deep- level gold mine. The use of boundary element methods for calculating distributions of elastic stress and displacement around mining excavations is illustrated for the cases of tabular orebody extraction and a tunnel intersection problem. For other clas- ses of problem, limiting equilibrium methods of analysis may be required. The ap- plication of limiting equilibrium analysis in the study of hangingwall caving and rooffalls is outlined.

本文概述了伦敦帝国学院岩石力学小组,将岩石力学原理应用于采矿坑道设计方面的最近工作。文中讨论了岩体中坑道稳定性的几种类型,给出了表示设计步骤的流程图。讨论了节理性岩石的一种新的经验强度准则,并以深部金矿中方形平巷周围的岩石破坏为例,说明了该准则的应用。以极状矿体开采和坑道交叉问题为例,说明了边界单元法计算采矿坑道周围弹性应力和位移的应用。对其他类型的问题,需要用极限平衡分析法。文中概述了极限平衡分析法在上盘崩落与顶板冒落研究中的应用。

The short life of drill string is mainly caused by premature fracture of steel rod and the failure of tapered shank of bit due to expansion.In this paper, the determination of the longitudinal stresses of steel rods and the expansive loads acted upon the tapered shanks of bits is described. The determination is conducted in a series of drop-hammer tests in 6 different types of media, including steel anvil,hard taconite, lead block, rubber, sand and free air, under simulated working condition of a rock...

The short life of drill string is mainly caused by premature fracture of steel rod and the failure of tapered shank of bit due to expansion.In this paper, the determination of the longitudinal stresses of steel rods and the expansive loads acted upon the tapered shanks of bits is described. The determination is conducted in a series of drop-hammer tests in 6 different types of media, including steel anvil,hard taconite, lead block, rubber, sand and free air, under simulated working condition of a rock drill. For YT-25 drill, the max. longitudinal stress in drill steel amounts to 5300-6000kg/cm2. By analyzing the aforementioned measurements and computations, a theoretical basis for the selection of materials and heat-treatment procedures of drill steels and drill bits is proposed.

钎头、钎杆早期折断和胀裤是目前钎具寿命不高的主要原因。作者在模拟凿岩机工作条件的落锤试验台上,对六种介质(钢砧、坚硬铁矿、铅、橡胶、河沙以及悬空等)测定了钎头、钎杆的轴向应力和胀裤力。对于YT—25型凿岩机,钎杆中最大轴向应力可达5300~6000公斤/厘米~2。根据测定结果,本文提出了分析意见,为钎杆和针头选材和制订热处理工艺提供了依据。

 
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