quadrant pit是什么意思

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Mathematical model of mine shaft deformation and its application;

矿山井筒变形的数学模型及应用

According to the factual problem of shaft deformations due to assistant shaft water of Jinqiao coal mine,it has studied the real time observation of shaft’s movement non?linear and deformation by GPS and applied cataclysm theory to build a cataclysm model of shaft damage.

针对金桥煤矿副井涌沙引发井筒变形的实际问题 ,研究了采用GPS技术实时监测井筒动态非线性变形方法 ;运用了突变理论 ,建立了井筒破坏的突变模型 ;给出了井筒变形的控制变量与状态变量表达式 ;对有效地治理损害的井筒具有重大指导作用 。

This,paper analyzes thepattern of vertical shaft deformation and destruction den to underground coal mining.

分析了地下开采引起立井井筒变形与破坏规律，并提出了井筒变形现场观测研究的理论根据、方法和手段。

Effect analysis of development by fracturing with rectangular well pattern in Zhaoyuan Oilfield of Daqing

大庆肇源油田矩形井网压裂开发效果分析

Current construction situation of the rectangle blind shaft is discribed and measures be necessarilytaken are proposed after analysing the reasons by which the construction speed is affected.

针对矩形盲井目前的施工现状,分析了影响成井速度的因素并采取必要的技术措施。

Based on proper assumption and the state of rectangular caisson under the load of pipejacking, calculation is made using the principle of dynamic balance to obtain the maximum earth pressure at the thrust wall of the rectangular working shaft while considering the mechanism of three dimensional forces and eccentric load on the earth.

通过适当的假定并根据矩形沉井在顶管工作时的受力状态 ,运用力的平衡原理 ,考虑土体三维受力机理以及在偏心荷载作用下 ,矩形工作井后背墙土体所能提供的最大土压

Study on the Prediction of Shaft Deformation with Huge Unconsolidated Soil Layer Based on FBG Monitoring

基于光纤光栅监测的厚松散层井筒变形预测研究

Similar Simulation and Experimental Analysis on Surrounding Rock Displacement and Deformation around Surface Borehole

地面钻井井筒围岩移动变形的相似模拟实验分析

Shut-in static pressure calculation of condensate gas wells considering phase behavior change in borehole

考虑井筒相态变化的凝析气井关井静压计算

The Construction Methods of the Outside Tube Wall withφ17.80M under the Tower Shaft in Dragon Mine

龙家堡煤矿主井井塔筒形基础施工方法

VARIATION LAW OF PRESSURE DROP AND PRODUCTIVITY RATE IN HORIZONTAL GAS WELL

水平气井井筒压降及产量变化规律研究

The application of Frequency Control on Steady Vehicles Group in Shaft Construction

稳车群变频调速在井筒施工中的应用

The Energy Dissipation Experiment and Mechanism Study of Circular Stilling Wells;

圆形深筒式消力井试验及消能机理研究

STUDY ON MODEL OF TEMPERATURE AND PRESSURE DISTRIBUTION IN CO2 WELL BORE FLOW INCLUDING THE FLUID PHASE CHANGE

CO_2井筒相变流动温度压力计算模型研究

Study on characteristics of horizontal well inflow performance considering variable mass flow in solution gas drive reservoirs

考虑井筒变质量流动的溶解气驱油藏水平井流入动态特性研究

Temperature-pressure field coupling calculation model considering phase behavior change in CO_2 injection well borehole

考虑相态变化的注CO_2井井筒温度压力场耦合计算模型

Finite Element Simulation of the Thin-wall Hydraulic Cylinder's Clamping Deformation

薄壁液压缸筒夹紧变形的有限元模拟

Intermittent flow is a very important flow pattern in actual gas - liquid two phase flow in horizontal wellbore.

间歇流是实际水平井筒气液两相流动中非常重要的一种流动形态。

Unified incremental solution of thin cylinder under step deformation path

薄壁圆筒在阶形变形路径下的统一增量解

Code for design of inclined shaft and chambers of coal mine

煤矿矿井斜井井筒及硐室设计规范

Experience on the shrink shaft drilling construction reserve period

缩短立井井筒凿井施工准备期的经验

The Designing of Observing Zhangbei s Chief Mine s Headframe s Base s Subsidence and Deformation;

张北主井井架基础沉降及变形观测设计

Workover Analysis and Understanding of Casing Deformation of Yuanba-2 Well

元坝2井套管变形错断修井分析与认识

Applying Combined Supporting to Controlling Arch Body Deformation and Damage of Auxiliary Shaft Wall

利用联合支护手段治理副井井壁碹体变形破坏