Meanwhile, degree of coalification is promoted because of tectonic rebuilding in some locations..Mechanical property of rock is tested. Stress field is simulated in Libi gorge anticline.
高陡背斜煤层气富集的构造控气机制，进行了煤岩的力学性质实验，计算了沥鼻峡背斜盐井矿区的应力场，研究了应力分布与煤层气富集的关系。
We understand sector pillar stress distribution in the course of up-layering working face and pillar stress affecting on floor rock strata. According to this result, we make sure the fitness position of alternate exterior entry; by using theory calculation and finite element calculation, we define the width of up and down-layering pillars.
清楚了上分层回采过程中区段煤柱上的载荷分布以及煤柱载荷对底板岩层的影响，以此为依据确定外错巷道的合理位置；通过理论计算和数值模拟确定了上、下分层区段护巷煤柱的宽度，确定出巷道的外错距和合理布置方案。
The project rockburst occurs much in the depth portion understructure work, belongs to three bearing conditions, three principal stress disparities are not big, the energy liberation becomes more and more difficult, therefore under the high crustal stress condition the rock mass can deposit the massive energies of deformation.
工程岩爆多发生在深部地下工程中，属于三项受压状态，三个主应力差距不大，能量释放变得越来越困难，高地应力条件下岩体能够储蓄大量的变形能。
Therefore, this paper start work form opening out the stress state and the method of rock slope degree on expressway.
为此，本文从揭示公路岩石边坡中的应力状态出发，结合公路岩石边坡坡度确定方法的研究。
In this paper, according to the homogeneity and liner elastic model, on the basis of study on in-situ stress and rock-strength of one gas field, using the Mohr-Coulomb rock-failure criterion, the wellbore-stability is analyzed under different in-situ stress environment, different Biots factor and with the influence of pressure depletion.
文章以均质各向同性和线－弹性模型为依据，在某气田地应力、岩石强度等参数研究的基础上，应用Mohr-Coulomb强度判别准则，就不同地应力环境、不同孔弹性系数以及压力衰竭对水平井井壁稳定性的影响进行了研究。
The properties of rock cutting fracture stress are further analysed by fractography of rock chip.
文中采用显微观察法，对三种硬岩的切削过程作了研究。
This Paper studies the propagating laws of blasting stress wave in the kelvin rock body, sets up numercal value calculating method of stress wave propagation, research makes clear that discontinuity of stress in the front of wave no exists, the propagation speed of lower stress is higher than that of higher stress, the rising time of stress wave is more and more, and the damping exponent has something to do with charge diameter because of viscosity influence.
本文从理论上研究了粘弹性岩体中爆炸应力波的传播规律，建立了粘弹性应力波传播的数值计算方法。研究表明，由于粘滞数应，应力波波阵面的不连续性已不复存在，低应力的传播速度高于高应力的传播速度，应力波的上升时间越来越大，且应力波的衰减指数与装药直径有关。
Rocks typically have several cracks and flaws, and for this reason the amplitude of the stress wave attenuates with propagation distance when the rock specimen is loaded under loads that are substantially lower than the yield point.
在冲击荷载下，即便是在作用荷载比较低的阶段，由于岩石内部自然缺陷的存在，应力波随着传播距离延伸，其幅值有较大的衰减。
Some lamprophyre existences in foundation rock will be harmful to the dam stability and foundation stress transfer, so it has to be treated for the dam safety.
坝区基础岩体中存在大量煌斑岩脉，对建筑物的稳定性、基础应力传递等极为不利，必须进行稳妥可靠的处理。
On recent classification of wall rocks, the basic concept of rock mechanics and mathematical statistics method, such as initial stress field, displacement of tunnel surrounding as well as the measured value of information and etc.
近期的围岩分类中，引进了岩体力学的基本概念和数理统计方法，如考虑初始应力场、坑道周边位移值，以及量测信息等，使围岩分类逐渐从定性分类向定量分类方向发展。
Finally, the different work conditions such as the construction, operation, inspection on one pumped-storage power station project in Liaoning Province are analyzed by 3-D non-linearity FEM method; the surrounding rock stability and the stress-strain situation of branch pipe are studied; two different kinds of designing theory based on surface force and seepage body force of water load are analyzed; different calculation methods are draw out; the thickness of concrete lining and the quantity of rebar are designed by adopting simplified spring model.
最后对辽宁某抽水蓄能电站工程钢筋混凝土岔管的施工、运行、检修等不同工况进行了三维非线性有限元分析，分析了岔管围岩的稳定性和衬砌的应力应变情况；分析了水荷载基于面力和渗透体力两种不同设计理论，提出了不同的计算方法；采用弹簧简化模型对混凝土衬砌厚度以及配筋进行设计。
It was shown that the variations of the stress field of rock strata, deformation and displacement of discontinuous blocks, strata collapse and abscises could be efficiently figured out by means of DDA.
应用DDA数值方法模拟分析了深部煤矿开采中上覆岩层的应力场变化和变形移动规律，并与相似物理模型试验进行了对比。
The maximum horizontal principal stress direction is nearly, which is in accord with the general direction of the regional maximum horizontal principal stress determined by measuring points in surrounding areas. The authors suggest that the long axis of the underground reservoir should be oriented in a nearly E-W direction in the future, and the in situ stress state, rock mass structure and rock strength will in the main ensure the rock mass stability.
测量结果表明：最大和最小水平主应力都远大干对应深度处的垂向应力，三向主应力的关系为：SH〉Sh〉Sv，应力大小在该深度范围属中等偏大级别；工程场区最大水平主应力方向近EW方向，与测点外围确定的区域最大水平主应力总体方向较为一致；建议未来地下硐库长轴按近EW分布，地应力状态、岩体结构构造、岩石强度等基本保证了其岩体稳定性。
Analysis on the stress and strain of the reacting wall of Baixugong grand karst cave and the time-varying characteristic of the surrounding rock pressure borne by temporary supporting wall at Laohuzui during construction was performed to discuss the disturbance of the surrounding rock induced by different excavation methods, and the reaction of the accessory structure was also analyzed.
通过对白须公特大溶洞隧道的溶洞支顶结构的应力应变以及老虎嘴处临时支撑结构承受上部围岩压力在施工过程时间变化特性分析，探讨不同的隧道开挖方式对围岩的扰动影响，并分析了地下附属结构物的回应。
Te is defined as theoretical flexure thickness of elastic thin plate equivalent with bending moment produced by the actual stress distribution in the lithospheric plate, standing for a depth of elastic behavior converted to rheological behavior that took place when the rock suffered a pressure over 100MPa in geological time scale.
Te定义为与岩石圈板块中实际应力分布所产生的弯矩相等的理论弯曲弹性薄板厚度，标志着在地质时间尺度内岩石承受超过100MPa压力时发生弹性行为和流变行为转变的深度。
By using the fast Lagrangian analysis of continua in 3-dimensions (finite element analysis software-Flac3D), taking the fragmentation chamber of Dongguashan copper mine as an example, one dynamic load is applied on the above boundary of the chamber model, the dynamic response of the surrounding rock is simulated and calculated. We observed the influence of the intensity of dynamic load to wall rock of chamber to get the distribution of stress and plastic area of it in different time by loading the peak value of dynamic.
利用三维快速拉格郎日法（Flac3D有限元分析程序），以冬瓜山铜矿某破碎硐室为实例，在硐室围岩模型的上边界施加动力载荷，以模拟外界动力扰动对硐室围岩稳定性的影响，再通过加载峰值，来考察动载强度对硐室围岩的影响，得出了硐室围岩在不同时刻的应力和塑性区分布情况。
Insights dependent on dynamic and physical analysis o f experimental results may be summarized as follows:①The relationship between the deformation of the rock and the migration of oil-gas under action of palaeo t ectonic stress are non-synchronous in time. The migration of oil and gas lagged behind the initial stage of structural deformation.②The orientation and magni tude of maximum principal stress controlled the distributions of the stress conc entration and high potential energy in the non-homogeneous media.③Horizontal angle between the orientation of maximum principal stress and the trend of the f ault is less than 90°. The orientation of minimum principal stress is approxima tely parallel to the trend of the faults.
对该实验结果进行物理学和动力学分析，得到的认识概括为：①油气运聚与古应力作用导致的岩石应变之间具有时间上的非同步性，油气运聚滞后于构造变形雏形幕；②最大主应力作用方向和强度控制着非均匀介质中应力集中区和高势能区的分布；③最大主应力作用方向与断层系之间的水平夹角小于90°，最小主应力作用方向与断层系走向之间往往近于平行；④应力轨迹图可能描述了应力传递方向与油气运移方向之间的几何关系，应力级值区分布图是确定低势能区和预测油气有利成藏区的重要佐证。
Based on statistical analysis of disced rock cores and rockburst about rock mass in exploration adit at the dam site where high ground stressis surrounded the causes of high ground stress are discussed in many respects, combined with characteristics of ground stress field, including the power source condition which is the regional tectonic setting and geological conditions, power storage conditions which is characteristic of lithology and structure of rock mass, power transformation and adjustment which is late reformation of rock mass. It is considered that high ground stress release is synthetical result caused by factors mentioned above.
针对坝区特定的高应力条件下岩体的应力释放现象，包括岩芯饼裂和勘探平硐岩爆发育普遍的特征，在统计分析的基础上，从力源条件-区域构造背景和地质构造条件、能力存储条件-岩性特征和岩体结构条件、后期演化-能量释放、转换与调整等分析的基础上，结合坝区地应力场分布的特征阐述了坝址区高地应力成因，认为坝区高地应力释放现象是上述各因素综合作用的结果。
The stress wave theory and wave function expansion method are used to analyze the interaction mechanisms of blasting seismic wave and the grouted rockbolts and deduce the analytical solution of stress and displacement of rockbolt, grout and rock mass body. Based on the stress and velocity calculated, the safe PPV for grouted rockbolt is decided.
利用波函数展开法，研究了爆破地震波与砂浆锚杆相互作用的机理，推导了爆破地震波作用下锚杆、砂浆以及围岩内的应力和位移表达式，根据砂浆边界上的应力和振速分布，确定了不同爆破地震频率下砂浆的安全振速范围。
The wave function expansion method is used to analyze the interaction of blasting seismic wave and the adjacent chambers, the influences of such factors as the radius of tunnel, the frequency of incident blasting seismic wave, rock mass types etc, on dynamic response and safe peak partical velocityof circular tunnel are discussed. The conformal mapping method is adopted to deduce the general solution of stress and displacement of arbitrary shape tunnels under the acting of the incident blasting seismic wave with different frequency and incident angle. Taking the arch tunnel with vertical sidewalls as the example, the distribution of stress and vibration velocity of rock mass is presented and analyzed, and then the safe peak particle vibration velocity is decided. The multi polar coordinate transform and complex function are used to study the dynamic response of shallowly buried circular tunnels under the blasting vibration.
利用波函数展开法，分析了爆破地震波与邻近圆形洞室的相互作用，讨论了洞径、入射波频率、围岩类型等因素对圆形洞室动态响应及安全振速的影响；利用保角变换方法，推导了不同频率的爆破地震波以不同角度入射于不规则洞室时，洞室围岩的应力和位移的一般解，并以直墙拱形洞室为例，求解了其围岩的应力和振速分布规律，进而求出其安全质点振速；采用复变函数法和多极坐标移动技术研究了爆破振动作用下浅埋圆形洞室的动力响应，研究了自由面的存在对地下洞室动力响应的影响。