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Search Results: 1 - 10 of 247097 matches for " br>赵阳升 "
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EXPERIMENTAL RESEARCH ON MECHANICAL PROPERTIES OF WATER-COOLED GRANITE UNDER HIGH TEMPERATURES WITHIN 600 ℃
600℃内高温状态花岗岩遇水冷却后力学特性试验研究

XI Baoping,ZHAO Yangsheng,<br>郤保平,赵阳升
岩石力学与工程学报 , 2010,
Abstract: 通过对600 ℃内高温状态花岗岩遇水冷却后的力学特性试验研究及花岗岩体遇水热破裂劣化机制的探讨,发现高温状态花岗岩遇水冷却过程中,由于岩体内温度急剧变化,岩体内产生热破裂或热冲击现象,岩体力学性能劣化,从而导致超声波速、单轴抗压强度、抗拉强度及弹性模量随温度逐渐减小。具体表现为:(1) 高温状态花岗岩遇水冷却后超声波速随着经历温度的升高呈负指数函数关系降低;(2) 花岗岩经过高温遇水冷却处理,峰值应力和峰值应变及其单轴抗压强度都受到很大影响;(3) 高温状态遇水冷却处理对花岗岩的抗拉强度影响明显,抗拉强度随温度的变化规律符合负指数函数关系;(4) 高温状态花岗岩遇水冷却后其弹性模量随温度的升高呈负对数规律减小。
TESTING STUDY ON MECHANICAL PROPERTY OF THENARDITE ROCK SALT
岩盐力学特性的试验研究

Liang Weiguo,Zhao Yangsheng,<br>梁卫国 赵阳升
岩石力学与工程学报 , 2004,
Abstract: Testing study is made on the basic mechanical property of thenardite salt rock,which includes uniaxial compressive,indirect tensile and angle changed shear tests. Through the testing and analysis,it is found that thenardite salt rock is a kind of soft rock,the strength of which is low and the deformation is distinct. Moreover,the uniaxial compressive deformation and damage of thenardite are different from other rocks during four deformation phases. With variation of shearing angles,the strength curve equation of thenardite and calcium thenardite salt rocks are deduced.
GAS-LIQUID TWO-PHASE CRITICAL SEEPAGE LAW IN SINGLE FRACTURE AND ITS RANDOM AND COMPOUND MATHEMATICAL MODEL
裂缝中气液二相流体临界渗流现象及其随机混合渗流数学模型研究

YANG Dong,ZHAO Yangsheng,<br>杨栋,赵阳升
岩石力学与工程学报 , 2008,
Abstract: 通过对裂缝中气液二相流体临界渗流现象的分析推理,建立描述这一现象的随机混合渗流数学模型.应用该模型,对出现临界渗流现象的概率分布范围、临界渗流区内气水连通团的微观分布特征以及临界渗流区内压力梯度的分布特征进行数值模拟,从而揭示这一现象产生的机制,并确定临界渗流现象在气体相对饱和度为44%~70%时都可能出现,但出现临界渗流现象的概率范围大于0.8的气体相对饱和度范围为47%~65%,在气体饱和度为57%~60%时,出现临界渗流现象的概率为1.0.
CORRELATIVITY OF ROCK INHOMOGENEITY AND ROCK BURST TREND
岩石非均质性与冲击倾向的相关规律研究

Feng Zengchao,Zhao Yangsheng,<br>冯增朝,赵阳升
岩石力学与工程学报 , 2003,
Abstract: The index E/l of rock burst trend is an import parameter which reflects possibility of rock brust,type of rock burst and intensity of rock burst. Based upon a great deal of numerical tests,the stress-strain curve of inhomogeneity rock is studied. It is found that the relation of rock burst trend index E/l and inhomogeneity parameter m is exponential function,and rock burst trend index decreases as inhomogeneity parameter m increases.
CONTROL EFFECT OF FISSURE SCALE ON DEFORMATION AND FAILURE OF ROCK MASS
岩体裂隙尺度对其变形与破坏的控制作用

FENG Zengchao,ZHAO Yangsheng,<br>冯增朝,赵阳升
岩石力学与工程学报 , 2008,
Abstract: Rock mass contains large-scale deficiencies,such as pores,fissures and faults,which are usually referred to rock defects.Faults,cracks and fissures are called high-level defects,micro-cracks,pores are called low-level defects.Rock defects of rock deformation and the damage control will have close relationship with different fissure scales.The relationship of quantity and scale of rock mass fissure is analyzed,including great crack and microcosmic fissure.Then with numerical simulation,it is found that the fractures of rock samples will increase gradually;and the control effects from microcosmic fracture scale to deformation and the rock mass failure are studied.The result indicates that the arrangement defect controls the deformation,stability and rock mass failure when the scales of crack,fissure,cavity,spacing,hole are coexisting in rock masses.
瓦斯压力在突出中作用的数值模拟研究
赵阳升
岩石力学与工程学报 , 1993,
Abstract: 本文详细论述了冲击地压与突出的特征,并深刻地研究了二者的统一机制,进而提出了突击的数学模型:失稳判据与控制方程.并给出了失稳理论的数值分析方法,提出了孔隙压初应力分析法与失稳判断的单位载荷法及FEM程序框图.基于以上工作,选择了15个数值试验方案,研究了煤体冲击倾向,孔隙瓦斯压及围岩应力对突出的影响.
THEORETICAL RESEARCH ON THERMAL CRACKING FRACTALS LAWS OF OIL SHALE
油页岩热破裂规律分形理论研究

KANG Zhiqin,ZHAO Yangsheng,YANG Dong,<br>康志勤,赵阳升,杨栋
岩石力学与工程学报 , 2010,
Abstract: The oil shale thermal cracking CT images under different temperatures are considered as the analytical objects;and the basic theories of fractals to the thermal cracking procedure of oil shale are applied for the first time. The distribution laws of the thermal fissures within the range of 200 ℃-600 ℃ of oil shale square body of 7.0 mm in length are researched;and the fractals dimensions and initial distribution values of the fissures under different temperatures are obtained. The achieved results show that the thermal fissures have strong self-similarity according with fractals laws,and the values of fractal dimensions are ranged from 1.0 to 1.5. The relationship between fractals dimensions,initial distribution values and temperatures is established. With fractals theory,the thermal cracking procedure of the oil shale,distribution state and complexity of the fissures are analyzed. The derived conclusions for analyzing the evolution of micro-seepage channels in the oil shale pyrolysis have important references;and at the same time,a new method and certain ideas for thermal cracking procedure of other rocks with fractals theory are offered.
INVESTIGATION ON SOLUTION PERVASION AND MECHANICAL CHARACTERISTICS OF GLAUBERITE SALT ROCK
钙芒硝盐岩溶解渗透力学特性研究

LIANG Weiguo,XU Suguo,ZHAO Yangsheng,<br>梁卫国,徐素国,赵阳升
岩石力学与工程学报 , 2006,
Abstract: Solution is an essential character for salt rocks. Pervasion is a liquid movement through porous media under the actions of solute concentration gradients, pressure gradients, or the both. As the difference of solution characters for different mineral components in calcium thenardite, the solution and pervasion mutual actions can be found in the calcium thenardite rock salt body under the action of certain osmotic pressure. Thus the calcium thenardite becomes penetrable porous medium, holding the pervasion and mechanical characteristics that are called solution pervasion and mechanical characteristics, respectively. It is greatly affected by the solubility of sodium sulfate, and one of the components is calcium thenardite. Experiments illustrate that the permeability is the function of solution time and osmotic pressure of calcium thenardite salt rock. Meanwhile, the three-dimensional mechanical characteristics of calcium thenardite salt rock take great changes after a period of solution pervasion actions. The compression strength of calcium thenardite rock salt changes from 46.53 MPa to 11.42 MPa after 49 h solution pervasion with 2.0 MPa confining pressure. Accordingly, the elastic modulus changes from 43.700 MPa to 0.834 MPa. So, it can be concluded that solution pervasion has great effect on mechanical characteristics of calcium thenardite rock salt.
INFLUENCE OF ROCK CELL CHARACTERISTICS AND ROCK INHOMOGENEITY PARAMETER ON COMPLETE CURVE OF STRESS-STRAIN
岩石的细胞元特性及其非均质分布对岩石全曲线性态的影响

Feng Zengchao,Zhao Yangsheng,Duan Kanglian,<br>冯增朝 赵阳升,段康廉
岩石力学与工程学报 , 2004,
Abstract: 采用非均质数值试验方法,研究了在无限大刚度的试验机条件下,岩石的细胞元特性及其非均质分布对岩石单轴压缩全程曲线性态的影响。结果表明,当岩石的非均质参数m≥6时,细胞元的非均质参数m是决定岩石单轴压缩全程曲线性态的主要因素;当m<6时,岩石的细胞元特性是决定岩石单轴压缩全程曲线性态的主要因素。
AN EXPERIMENTAL STUDY ON THE PERMEABILITY LAW OF NATURAL FRACTURE UNDER 3-D STRESSES
三维应力作用下天然裂隙渗流规律的实验研究

Zheng Shaohe,Zhao Yangsheng,Duan Kanglian,<br>郑少河,赵阳升,段康廉
岩石力学与工程学报 , 1999,
Abstract: On the basis of an experimental study, a permeability law of natural fracture under 3D stresses is developed. The relations between fracture closure b and permeability coefficient kf, equivalent normal stress ne and b are also formed. Compared to the modified cub law, the permeability law is proved reasonability. The change of permeability characteristics under high stresses is discussed primarily.
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