岩石抗拉强度

采用Griffith强度理论，得到了用岩石抗拉强度表示的地下洞室开挖中发生岩爆的临界应力公式。

Based on Griffith theory and using the tensile strength of rock , the formulae of critical stress for rock burst in underground opening have been obtained .

采用平台巴西圆盘试样测试岩石抗拉强度的方法

Method to determine tensile strength of rock using flattened Brazilian disk

同时，参量2~（1/2）U可以取做为含有随机分布较小裂隙的岩石抗拉强度。

The parameter 2 ~ ( 1 / 2 ) U may be taken also as a tensile strength of rock which contains small randomly distributed preexisting cracks .

试验方法对岩石抗拉强度测定的影响

Influence of Test Methods on Measured Results of Rock Tensile Strength

中等应变速率下岩石抗拉强度实验研究

Experimental Study of Rock Tensile Strength Under Intermediate Strain Rate

岩石抗拉强度试验方法的探讨

Approach to Test Method of Rock Strength in Uniaxial Tension

平台巴西圆盘劈裂和岩石抗拉强度的试验研究

Experimental study on split test with flattened disk and tensile strength of rock

用水力破裂法测得岩石抗拉强度的统计分析

The Statistical Analysis for Tensile Strength of Rock by Laboratory Hydraulic Fracturing Method

圆盘厚度对岩石抗拉强度公式的影响性研究

Effect of Disc Thickness on Rock Tensile Strength Formula

岩石抗拉强度特性的劈裂试验分析

Splitting Test and Analysis of Rock Tensile Strength

孔压致裂法获得的岩石抗拉强度值偏高。

The values of rock tension strength from hydrofracturing are higher than those from other methods .

考虑了上覆岩层压力、地层孔隙压力、构造应力和岩石抗拉强度等因素对地层破裂压力的影响。

Taken into consideration is the effect of overlay pressure , formation pore pressure , structure stress and tensile strength on formation-parting pressure .

本方法充分运用了岩石抗拉强度低，和高压水对岩石有利渗透作用的条件，从而达到岩石裂纹的产生与扩展，直到最后劈裂。

This method takes full advantage of the low tensile strength of rock and high permeating ability of high pressure water which enable the initiation and propagation of cracks and the accomplishment of rock fragmentation .

岩石抗拉强度是指岩石试件在外荷载的作用下抵抗抗拉应力的能力，为岩石试件在拉伸破坏时的极限荷载与受拉截面面积的比值。

The tensile strength of rock is the ability to resist tensile stress in the rock specimen as a role of external load and ultimate load in the tensile failure of rock specimen with pull-sectional area .

通过几个有代表性抗拉强度计算式的理论分析与对比研究，从理论上证明这一误差产生的原因和解决的途径，为精确测定岩石抗拉强度提供了理论依据。

Finally , the error cause and resolution is proved theoretically through the theoretical analysis and comparison research for several typical tensile strength formula , which provides theoretical grounds for refined calculation of rock tensile strength .

实验结果表明，射流辅助钻井的门限压力是岩石抗拉强度的4.1倍，是抗压强度的26%；还与井底压差及其它岩石物理力学性质有关。

Testing results indicate that the threshold pressure of jet aided drilling is 4.1 times of rock tensile strength and 26 % of rock compressive resistance , also related with the bottom hole pressure difference and rock physical properties .

本文在研究水压破裂法测试岩石抗拉强度的方法及原理的基础上，用统计断裂力学整理试验结果，并与巴西法作了比较。

Based on the method and principle study of hydraulic fracturing test for measuring tensile strength , the statistic fracture mechanics was used to arrange test results in this paper , and the test results were compared with Brazilian method .

运用水压破裂法测试岩石的抗拉强度

The rock tensile strength measurement using hydraulic fracturing test

围压条件下岩石的抗拉强度

Tension resistent strength of rock under confining pressure

当压力达到破坏压力时，模型沿布置孔的方向的Y方向拉应力超过了岩石的抗拉强度，岩石破裂。

When the pressure reaches the breaking pressure , along the direction of the arrangement hole , the Y-direction tensile stress exceeds the tensile strength of the rock , so rock fracture .

岩石的抗拉强度是岩石的重要力学性质指标之一，也是岩石结构设计中安全与稳定性分析的一个控制性参数。

The tensile strength of the rock is not only one of the indicators of the important mechanical properties of the rock , but also a controlling parameter of the security and stability analysis in rock structure design .

圆盘试样的劈裂试验可以确定岩石的抗拉强度，不过由于压条与试样接触处的压应力极高引起岩石的屈服碎裂，与试验原理不符。

The tensile strength can be determined from the split test of a disk specimen , or Brazil test . However , yield and fracture will occur in the rock near the loading points under high stresses , which is different from its testing principle .

加载速率对岩石抗压和抗拉强度的影响

The Effect of Loading Rate on the Compressive and Tensile Strength of Rocks

不规则岩石试件抗拉强度的套筒致裂试验研究

An Experimental Study on Tensile Strength of Irregular Rock Sample by Sleeve Fracturing Technique

用岩芯进行径向点荷试验，是简单而较精确地获得岩石抗拉、抗压强度的极有前途的方法。

Diametral point load test is a very promising , simple and accurate method for obtaining compressive and tensile strength data of rock core .

若岩石的应变抗拉强度由εt表示，即使岩石三向受压，张性破裂的εt始终是拉应变，岩石的抗拉强度由应变来表征似乎更合理。

And when ε t indicates the tension resistent strength of the rock , the ε t of tensile fracture is always the tension strain , even if the rock sits are in three-directional pressure .

用岩石抗压强度与抗拉强度之比这一参数，可以较好地描述岩爆烈度。

The ratio of the compressive and tensile strengthes can be used to describe the rock burst intensity .