查询词典 surrounding rock

Proceeding from the thought of blasted fragments having the fractal characteristics, the calculation of blasted fragment sizes was related to the mechanism of blasting in jointed rock masses by the new concept of "rock mass fracture ratio" presented and , thus, the model of damage mechanics for blasting in rock masses was established, which reflects the blasting essence of both rock masses breaking along joint planes and rock breaking.

从爆破岩块具有分形特征的思想出发，通过提出&岩体破裂比率&概念，将爆破块度计算同节理岩体爆破机制相联系，建立起岩体爆破块度的损伤力学模型，该模型反映了岩体沿节理面破裂和岩石本身破裂的岩体爆破本质。

With the geometry model of the roller cone rock bit and kinematics model, by setting up rock failure model of bottom rock and interaction model between teeth and rock, the interaction dynamic modeling of Bits and rock is established in the process of petroleum drilling.

本文对在钻井过程中由于牙轮钻头与岩石互作用及钻柱的弹性变形导致牙轮钻头和钻柱在钻井过程的振动问题进行了深入地分析研究。

With the geometry model and kinematics model of roller cone rock bit, the interaction model of rock bit and rock is established which was based on the experiment of interaction between single tooth and rock. It is a good fundament for the computer simulation on working action of rock bit drilling.

在牙轮钻头几何学、运动学基础上，利用单齿压入与刮切岩石实验建立了钻头与岩石互作用力学模型，实现了对钻头在钻井过程中工作行为的仿真计算； 2。

In the process of impact of abrasive jet on rock, resulting dynamic stress plays an important role in rock destruction. The stress wave resulted makes local rock tensile and shearing, then makes rock destructed. In the conditions of some hypotheses, the mechanical model that rock is applied by stress wave, i.e. jet wave basic equations, are set up by wave theory, and the formula of the maximum normal stress resulted by stress wave is deduced according to known boundary conditions.

描述了岩石材料在磨料射流的冲击下破坏的主要原因，分析了应力波就是岩石局部受到拉伸和剪切并最终使岩石发生破坏的根本因素，在这一假设的前提下采用波动理论建立了岩石受应力波作用的力学模型即射流波动的基本方程，在已知的边界条件下推导出了由波动引起的最大正应力的计算公式。

While the organic matters in the carbonate rock and the mud rock are all more than that in Ordovician, especially, source rock thickness of carbonate rock is a suite of very important marine facies source rock in Tarim basin.

而寒武系无论是碳酸盐岩还是泥岩，其有机质丰度均高于奥陶系，尤其是碳酸盐岩烃源岩厚度也较大，因而是塔里木盆地一套十分重要的海相烃源岩。

England is also credited with being the birthplace of many musical genres and movements such as hard rock, British invasion, heavy metal, britpop, glam rock, drum and bass, progressive rock, punk rock, gothic rock, shoegazing, acid house, UK garage, trip hop and dubstep.

英格兰还记的诞生地与目前的许多音乐流派和运动，如坚硬的岩石，英国入侵，重金属，英伦摇滚，华丽摇滚，鼓声和低音，前卫摇滚，朋克摇滚，哥特摇滚， shoegazing ，酸房子，英国车库，行程hop和dubstep 。

Making use of petrochemical analysis and petrography,Werecover ancient rock's construction on the Archaean Era,Through the practice,We find bedrock consists of a set of neutrality and basis volcanic rock ,volcanoclastic rock ,deposition rock and partial volcanic rock with acidity.

利用岩石化学分析法并结合岩相学等特点将太古宙变质岩进行了原岩建造恢复，认为太古宙原岩为一套中、基性火山岩、火山碎屑岩和沉积岩，局部夹酸性火山岩建造。

The key of longwall mining along strike safely and efficiently is efficacious controlling of surrounding rock, and the difficult points of surrounding rock controlling are dynamic stability of system "R-S-F" has be made clear by the facts from site test, experimental study and theoretical analysis, and three patterns may cause system "R-S-F" destabilization, such as dislocation, consequentiality and retrogradation among R, S and F in the process of longwall face advancing is put forward in the paper .

大倾角煤层走向长壁工作面开采方法与装备研究由于其矿压显现和围岩破断活动的复杂性而进展缓慢，较少见到国外主要产煤国家此方面的专门文献，我国目前的研究、试验与使用水平处于国际该领域的前沿。

First, considering the volume expansion process of corroded bolt, the displacement model of mortar inner surface leaded by bolt corrosion is established after the loss of corrosion production is denoted by a filling factor. Second, based on elastic theory, the mortar cracking process is analyzed after the concept of influence coefficient of surrounding rock is introduced in the course of analyzing, and the degree of cracking course affected by surrounding rock parameter is also analyzed; the finite element method is adopted to verify the results.

考虑锚杆锈蚀体积膨胀过程，以填充系数表示砂浆开裂过程中锚杆锈蚀产物的损失，建立了锚杆锈蚀后砂浆内部位移模型，以弹性力学为基础，引入围岩参数影响系数概念，对锚杆锈蚀导致砂浆保护层开裂过程以及围岩参数对开裂过程的影响程度等进行了分析研究，并采用有限元分析方法对其进行了验证。

The observation results reveal the difference between surrounding rock pressures of shallow tunnel calculated by exiting methods and test results is large, pressure figure seems cat ear, surrounding rock pressure of deep tunnel belongs to clastic pressure, the test result is consistent with result by modified KAKE formula, the invert stress properties of shallow tunnel and deep tunnel are different, the axial force of lattice girder is at pressure in majority, and the stress of second lining is relatively small in loess highway tunnel.

实测结果表明：现有浅埋隧道围岩压力公式计算结果与实测结果偏差较大，其分布呈"猫耳朵"形状；深埋隧道围岩压力属形变压力，其实测值与修正卡柯公式计算结果较为一致；深埋与浅埋隧道中仰拱的受力性态有所不同；格栅拱钢筋轴力以受压为主；黄土公路隧道二次衬砌受力相对较小。

Researches reveal that students who suffer from corporal punishment tend to resort to violence in their future life.

研究表明遭受过肉体惩罚的孩子倾向于在他们今后的人生中使用暴力。

Total sugar of sarcocarp and chlorophyll of pericarp increased firstly, and then decreased afterward along with altitude; Titratable acidity, ascorbicacid and anthocyanin of pericarp were increased along with altitude; The content of protein increased firstly and decreased afterward along with altitude; Carotenoid of pericarp were decreased along with altitude.

果肉总糖和果皮叶绿素含量随海拔高度升高先升高后降低；可滴定酸、维生素C和果皮花青苷含量均随海拔升高而升高；蛋白质在1720m处最大，1420m处最小；果皮类胡萝卜素随海拔升高而降低。