rock mass strength

A study of tensile-shear crack and strength related to jointed rock mass

节理岩体拉剪断裂与强度研究

Aiming at the deficiencies of using Hoek-Brown strength criterion estimate the rock mass mechanical parameter in the practical application, the microstructure tensor is adopted to describe the parameters of the Hoek-Brown strength criterion, which can consider the anisotropism of slope rock mass.

用微结构张量表示广义Hoek-Brown强度准则参数，使之可以考虑边坡岩体各向异性特性；

The conclusions are as follows: ( 1) Because of bad physical mechanical property of rock mass, low strength, so many structural planes and minor faults which leads to weak strip after weathered, the homeostasis of the slightly weathered rock slope is serious.

得出以下主要结论：（1）浅变质岩风化层边坡岩体的物理力学性质差，强度低，坡体内构造面、小断层发育，风化后形成软弱带，导致浅变质岩风化层边坡自身稳定性差。

At the extent of 55 °≤δ≤ 70 °, maximum shear stress of closer empty element rock mass is all less than compressive strength of coal bed roof and floor plate mudstone including shale interlayer.

在55°≤δ≤70°范围内，煤层开采临空单元岩体最大剪应力皆小于煤层顶、底板泥岩夹页岩的抗压强度，其屈服接近度也大多小于10。

The shearing strength is one of the main indexes of rock mass.

土体的抗剪强度是土体的主要强度指标之一.

Studies on the Comprehensive Shear Strength Character of Compound Slip Surface in Rock mass

岩体复合滑动面综合抗剪强度特性研究

The anisotropy of rock mass strength and deformation directly affects its stability.

岩体强度和变形的各向异性直接影响岩体的稳定.

Because of the constraint of experimental equipment and technology, there are quite few studies on the crack propagation mechanism of rock mass under tensile stress. Compared to the compressive strength, the tensile strength of rock mass is very low.

目前压缩条件下岩体中三维裂隙扩展演化机制的试验研究已有一些，但由于试验设备和技术方面的制约，拉伸条件下相应的成果很少。

RQD value and broken rock mass strength was resolved.

RQD值对破碎岩体强度的影响.

The key block mechanics analysis of roadways' roof unsteadiness in cranny rock-mass and its supporting strength design

裂隙岩体巷道顶板失稳的块体力学分析与支护强度设计

The compress strength of basaltic rock mass increases by 2~ 3 times from upper part, lower part of weakly weathered rock mass to fresh one, While tension strength increases with 1 magnitude.

从弱风化上段、弱风化下段到微新岩体，抗压强度以2～3倍的量级增大；而抗拉强度以一个数量级增大。

During the deformation, disintegration and failure of debris-soil landslides, in space the plastic strain of the sliding mass and shear strength of the rock or soil mass on a sliding plane are different.

在碎石土滑坡变形解体破坏过程中，在空间上滑体塑性应变和滑面上岩土体抗剪强度的发挥程度是不一致的；