井下

煤矿井下软起动装置的研究

Research on the Soft Starter in the Pit of the Colliery

煤矿井下局部通风机供电系统的改进

On the Improvement of Power - supply System of the Booster in the Pit

上夜班的矿工应该早就安全地到达井下了。

The night shift should have been safely down the mine long ago .

会谈之后，工人委员会的领袖说他手下的工人们会重回井下工作。

After the talks , the leader of the Workers ' Council said his men would be going back down the mines .

他在井下工作。

He works at ( or down ) the pit .

基于Web技术的煤矿井下供电电网实时监控系统

Web-based Real-time Monitoring and Control System of Electric Power Supply Network Underground Mine

井下介质对相量感应测井x信号影响的理论。

Theoretical Study on the Effect of Subsurface Media on x Signal in Phasor Induction Log .

RS码在井下通信中的应用

Application of RS Code in Underground Communication

目前国内尚没有适合海上油井完井采油的井下安全阀定型产品，为此研制出SF－1型井下安全阀。

A downhole safety valve for offshore well completion is developed .

基于DTC的井下架线式电机车变频调速装置设计与应用

Design of DTC Variable Frequency Speed-Regulating Device in Underground Trolley Locomotive and Application

长庆井下作业系统HSE管理存在问题及下步管理方向

On the Improvement of HSE Management in Down-hole Operation System of Changqing Oilfield

探测井下气层的VSP法方案

A suggestion of detecting gas layer by VSP method

PDMS永久井下监测系统及其应用

PDMS Everlasting Downhole Observation System and Its Application

本文介绍了PLC控制器在井下环境模拟石油仪器测试系统中的应用。该系统可以模拟石油井下温度和压力等，能够对井下各种仪器的性能指标进行测试和校验。

In this paper , we introduce the application of PLC controller in apparatus test system which simulates environment oil well , and can test the performance index of the oil instruments .

通过RFID远距离射频识别技术，定位井下人员的轨迹，通过CAN总线传输到井上计算机，实现人员定位和考勤管理。

The system can locate persons under the mine by RFID technology . Computer can manage the location and check on work information transfered from microcontroller via CAN .

按给定速度图，采用PID高级单元，构成转速、电流PI调节器，实现双闭环调速控制，通过井下、井上的控制信号，实现矿井交流提升机全自动调速控制和手动检修控制。

On the basis of speed chart , the designer used PID units to achieve double closed-loop control by making up speed and current regulator . And realized automatic control for mining AC elevator .

井下接尘工人IL-12和IFN-γ水平与矽尘接触工龄、年龄均无关（P0.05）。

The serum levels of IL-12 and IFN - γ in healthy coal workers were not associated with the duration of exposure to dust and the years of age ( P0.05 ) .

石油井下作业企业如何建立、运行和不断改进ISO9002质量体系

How to establish , operate and perfect the ISO 9002 quality system in the down-hole job

通过对矿井下的具体环境和UWB无线接入系统在井下应用存在问题的分析，证明该技术在煤矿井下应用的实际可行性。

By analyzing the special environment underground and existent problems in the application of UWB wireless access system underground , the practical feasibility of using the technology underground coal mine can be proved .

只要操作者掌握冲击能Ud和断裂功Ak的大小，就能比较可靠地进行井下解卡并打捞或往井下投放其它工具等作业。

The operator can accomplish the operations of retrieving the stuck tool or running some given tool in the hole reliably , so long as he has a good grasp of the impact energy U_d and the shearing work A_k .

分析了各种可能用于井下螺杆泵驱动减速器的优缺点，确定了以N型少齿差行星齿轮减速器用于井下螺杆泵驱动，编制了井下螺杆泵少齿差行星减速器设计的CAD系统。

Various reducers of downhole screw pumps are investigated . It is proved that the prototype of planetary gears with a small tooth difference can be used for reducer in downhole screw pump . The CAD system for designing this kind of reducer is developed .

介绍了针对井下采煤机工作现场振动检测而开发的基于ARM7嵌入式微机的检测仪器。

The paper introduces a kind of inspecting instrument with embedded microcomputer based on ARM7 , which is developed aiming at spot inspection to vibration occurs from silo shearer .

基于S7-224实现的井下车场自动监控系统

Automatic Monitor and Control System for the Truck Yard in Mine Based on S7-224

文章以Petri网理论为基础，构建了煤矿井下皮带机顺序控制系统的网络模型，并根据皮带机控制系统的设计要求，分析了控制模型的组织结构和行为特征。

Based on the theory of Petri nets , a network model of the sequence control system of belt conveyors used in coal mines is constructed . The structure and behavior characters of the control model according with the design requirements are analyzed .

JZS156SFⅠ井下工具组装试验机

JZS 156SF I Assemble-and-Test Machine for Downhole Tools

随钻导向、实时优化、井下动态诊断及其集成技术是解决这些难题的有效途径，基于智能钻柱，提出了把上述三项技术集成为一个整体的集成化的SOD系统；

The steering drilling , real-time optimizing drilling and dynamic diagnosis techniques while drilling as well as the integration of above techniques are right ways for solving above problems . Based on the intelligent drill-string , an integrated steering-optimizing-diagnosis ( SOD ) system was proposed .

基于MUSIC算法和OFDM技术的频域超分辨率TOA算法研究用白噪声中的谐波过程对井下巷道的频域响应建模，将谐波恢复中基于自相关矩阵特征分解的超分辨率谱估计理论应用于TOA估计当中。

Research on super-resolution TOA algorithms based on MUSIC algorithm and OFDM technology The frequency domain channel response was modeled as a broad sense harmonic process , and the super-resolution spectrum estimation theory based on eigen-decomposition was applied to the TOA estimation problem .

UK-12型井下运矿车的研制

Development of underground ore - hauler model UK-12

因此，焊接过程中PDC金刚石层的温度要控制在700℃以下，并要求焊接后PDC与钻头钢体间有足够的抗剪强度，以使PDC能在井下长期工作不失效。

Consequently , during the course of welding , the temperature of diamond layer of PDC should be controlled under 700 ℃, at the same time the sufficient resist shearing intensity between PDC and bit body should be ensured .

当地层倾斜时，利用常规VSP走廊叠加记录标定层位存在误差，而且此误差随着地层倾角的增大而增大，随着井下检波器与地层分界面之间的距离减小而减小。

Using ordinary VSP corridor stack section to label the horizons often causes errors when dip formation exists , and these errors increases with dip of formation increasing and decrease with the distance between the downhole geophone and interface of formations decreasing .