湖北电力调度软交换容灾备用系统建设研究

针对“省为地备、地为县备”的容灾建设机制,文章在分析湖北电力通信调度系统现状的基础上。对通信网络容灾中采用软交换方式建设全省的调度电话备用系统展开讨论。通过建立调度软交换备用系统这种方式来满足容灾机制要求,提高调度交换系统网络安全性,扩展调度通信系统业务新模式。     

应用于矿井的RFID应答器设计

采用RFID(射频识别)芯片IA4420设计了一款主动式应答器,主要应用于矿井安全生产管理。其工作中心频率为905 MHz,数据通信的核心部分是印刷偶极子天线,从仿真结果来看:其相对带宽约为40%,增益约为4.236 dB,输入阻抗接近纯电阻50Ω,性能参数较好。     

Research on prevention and cure against heat-harm in constructing mines

With the mine exploitation depth getting deeper and deeper, the mine heat-harm turns into another natural disaster after the five disasters, which are the roof, the gas, the fire, the dust and the flood disaster. Compared with other researches on prevention and cure against the heat-harm, the research on prevention and cure against the heat-harm in constructing mine are less. Referring to the experience of prevention and cure against the heat-harm home and ＇abroad, analyzing the characteristic of cooling in the constructing mine, and based on the ground former freezing equipments and the modified mine temporary cooling equipments, the paper proposed four technical projects. By comparing with the four technical projects, the second project is preponderant both in technology and economy and can solve the heat-harm of the constructing mine, which is proved by the forecast and calculation. The project can be widely applied in de-temperature tasks of high temperature and heat-harm mines during the mine constructing period and in the exploiting preparing phase.     

Study on rock burst of fully mechanized sublevel caving mining in deep mine

The theoretical analysis, numerical simulation and field observation were used to study distribution characters of abutment pressure of fully mechanized sublevel caving face in deep mine, fully mechanized sublevel caving and pressure relief in entries along goaf to the influence of rock burst. The results show that： （1） With the increasing of mining depth, the abutment pressure zone is larger, its peak point is transferred to the front of face, the danger area occurring rock burst in the two fully mechanized sublevel caving entries is larger, and its position is far from the face; （2） There is larger failure area in the upper coal in front of the fully mechanized caving face, and strata possibly occurring rock burst transferred to the upwards or far from faces because of the main roof＇s buffer effect to the dynamic pressure burst, then possibility and strength reduced; （3） The position occurring rock burst is stress concentration zones （abutment pressure along the goaf and residual tectonic stress） and zones with geological structure; （4） Strenuous activities of roof is the inducing factor occurring rock burst.     

Research on prediction for coal and gas outburst based on Matlab neural network toolbox and its application

In order to predict the danger of coal and gas outburst in mine coal layer correctly, on the basis of the VLBP and LMBP algorithm in Matlab neural network toolbox, one kind of modified BP neural network was put forth to speed up the network convergence speed in this paper. Firstly, according to the characteristics of coal and gas outburst, five key influencing factors such as excavation depth, pressure of gas, and geologic destroy degree were selected as the judging indexes of coal and gas outburst. Secondly, the prediction model for coal and gas outburst was built. Finally, it was verified by practical examples. Practical application demonstrates that, on the one hand, the modified BP prediction model based on the Matlab neural network toolbox can overcome the disadvantages of constringency and, on the other hand, it has fast convergence speed and good prediction accuracy. The analysis and computing results show that the computing speed by LMBP algorithm is faster than by VLBP algorithm but needs more memory. And the resuits show that the prediction results are identical with actual results and this model is a very efficient prediction method for mine coal and gas outburst, and has an important practical meaning for the mine production safety. So we conclude that it can be used to predict coal and gas outburst precisely in actual engineering.     

光纤感温火灾预警监测系统的设计与应用分析

阐述光纤感温预警监测系统的工作原理、系统设计及应用研究方面的概况及意义,探讨光纤感温火灾预警监测系统的设计与应用.     

矿用防爆变频技术及应用研究

本文首先对防爆技术进行了介绍,并对矿用防爆变频系统及其在煤矿中的相关应用进行了研究,给出了智能局扇、乳化液泵、皮带机、刮板机变频驱动系统、绞车提升机系统五种不同负载工况的应用方案。最后给出了研制500kW/1140V隔爆兼本质安全型变频器的系统方案,提出了隔爆兼本质安全结构和电气系统的设计方法。其研究结果具有较大的工程价值和实践意义。     

一种多目标打击时火炮定位的新方法

为提高半自主式坦克火控系统的连续打击能力,针对当前坦克火控系统无法实现多目标跟踪的现状,克服了在坦克上安装雷达等方式存在的改造成本高、易暴露和资源浪费等弊端,结合装备特点提出了一种基于新型坐标体系和GPS定位的打击多目标时的火炮定位新方法。该方法通过在新型坐标体系下的目标位置记忆、目标位置预测和火炮角度定位,可实现对多个目标位置的粗略跟踪。实验证明,此方法对于数量为4个以下的多目标跟踪具有较高的准确率和良好的应用前景。     

连发武器射频与固有频率匹配关系研究

在建立武器有限元模型与散布精度影响模型的基础上 ,构造了影响武器连发射击精度的多元目标函数 ,通过采用改变射击频率的方法 ,找出了连发武器射击频率与结构固有频率的合理匹配关系 ,其结果已得到实验验证     

煤矿采矿工程中的采矿工艺与技术

阐述了煤矿采矿工程的特点,分析了目前常用的采矿工艺与技术,主要包括充填采矿工艺、空场采矿工艺、煤与瓦斯联合开采技术,并对智能化采矿技术的发展做了简要分析.