神华乌海能源公司安全监控系统联网建设解读

神华乌海能源公司(以下简称"公司")在安全监控联网系统的开发过程中,针对可能出现的各种问题,提出了综合性的联网解决方案。同时又通过强有力的管理手段,保障了系统的稳定可靠运行,使系统达到了预期的应用效果,提升了公司的安全管理水平。     

我国矿井水资源化利用现状及前景展望

针对现阶段我国在矿井水资源化政策制定、科学研究、人才培养及宣传等方面存在的问题,在总结全国53处煤矿矿井水利用率、利用方式、利用价格等现状的基础上,分析了矿井水资源化利用的制约因素,提出了出台落地性政策、加强创新人才建设培养、分质分类利用、加大宣传和发挥行业协会作用等政策方面的建议,指出高质量矿井水的开发、矿井水资源热能利用、产业化和规模化经营、废弃矿矿井水资源化利用等是矿井水热能利用的方向。     

Conceptual digital twin modeling based on an integrated five-dimensional framework and TRIZ function model

Digital twin represents a fusion of the informational and physical domains, to bridge the material and virtual worlds. Existing methods of digital twin modeling are mainly based on modular representation, which limits guidance of the modeling process. Such methods do not consider the components or operational rules of the digital twin in detail, thereby preventing designers from applying these methods in their fields. With the increasing application of digital twin to various engineering fields, an effective method of modeling a multi-dimensional digital twin at the conceptual level is required. To such an end, this paper presents a method for the conceptual modeling of a digital twin based on a five-dimensional digital twin framework to represent the complex relationship between digital twin objects and their attributes. The proposed method was used to model the digital twin of an intelligent vehicle at the concept level.     

Making costly manufacturing smart with transfer learning under limited data: A case study on composites autoclave processing

The integration of advanced manufacturing processes with ground-breaking Artificial Intelligence methods continue to provide unprecedented opportunities towards modern cyber-physical manufacturing processes, known as smart manufacturing or Industry 4.0. However, the “smartness” level of such approaches closely depends on the degree to which the implemented predictive models can handle uncertainties and production data shifts in the factory over time. In the case of change in a manufacturing process configuration with no sufficient new data, conventional Machine Learning (ML) models often tend to perform poorly. In this article, a transfer learning (TL) framework is proposed to tackle the aforementioned issue in modeling smart manufacturing. Namely, the proposed TL framework is able to adapt to probable shifts in the production process design and deliver accurate predictions without the need to re-train the model. Armed with sequential unfreezing and early stopping methods, the model demonstrated the ability to avoid catastrophic forgetting in the presence of severely limited data. Through the exemplified industry-focused case study on autoclave composite processing, the model yielded a drastic (88%) improvement in the generalization accuracy compared to the conventional learning, while reducing the computational and temporal cost by 56%.     

安全高效矿井监控关键技术研究

提出安全高效矿井应采用先进可靠的监控技术,实现供电、排水、通风、压风、运输、提升、瓦斯抽采等固定岗位无人值守和地面远程控制,综采、综放等采煤工作面少人作业和地面远程控制;提出供电、排水、通风、压风、运输、提升、瓦斯抽采等监控系统应具有地面远程控制功能;提出具有远程控制、报警联动、调度指挥等功能的煤矿调度指挥控制中心;提出整合计算机网络机房、程控交换机机房、调度交换机机房、监控系统机房等的数据中心;提出基于煤层瓦斯压力和瓦斯含量、综合指标、钻屑瓦斯解吸指标、复合指标、R值指标、瓦斯涌出量(根据瓦斯体积分数和风量计算)、巷道位置、微震、地音、温度等及其变化的煤与瓦斯突出预警方法;提出基于WiFi的矿用无线传输接口,以便于互通互联;提出通过分布式光纤测温预警煤炭自然发火,较通过监测CO等煤炭自然发火标志气体更直接、更及时、更可靠;提出根据运煤量实时调整输送带速度:当煤量较小时降低输送带运行速度,当煤量较大时提高输送带运行速度,以提高运输效率,减少设备磨损;提出基于光纤综合保护的供电监控系统具有防越级跳闸、地面远程整定和地面远程控制功能,提高了煤矿供电的可靠性,可实现煤矿井下机电硐室无人值守;提出具有煤岩识别与滚筒自动调高,采煤机、刮板机、液压支架3机联动,记忆割煤,地面远程、顺槽近程、手动控制和紧急停机,放顶煤量和煤矸控制,采煤机和刮板机等大型机电设备故障诊断等功能的采煤工作面监控系统。     

基于SPOT-5多光谱影像的矿区塌塘水体提取方法研究

针对基于遥感影像的水体提取方法存在水体提取不完整和误提的现象,提出了一种基于SPOT-5多光谱影像的矿区塌塘水体提取方法。在利用波段合成增加一个可用波段的基础上对已有的水体提取方法进行适当的改进,并基于决策树分类器和改进后的方法进行矿区水体的四级提取,保证了水体提取的完整性,同时减少了误提率;最后利用实测数据对水体提取的精度进行了评定。试验结果表明,基于决策树分类器的水体提取方法具有较高的精度,能满足矿区实际应用的需要。     

基于Multipath的煤矿巷道三维模型构建方法

针对现有煤矿巷道三维模型存在灵活性和可移植性差、数据更新维护困难等问题,提出了一种基于Multipath的煤矿巷道三维模型构建方法。该方法通过定义点弧拓扑数据模型,将煤矿CAD格式数据转换为Geodatabase中的要素类,利用开发的ArcGIS Engine程序、通过插入节点坐标生成巷道三维模型,实现了煤矿巷道自动建模,有效减少了巷道三维建模的工作量。     

基于S5PV210的矿井综合接入网关的设计

针对现有矿井接入网关的专用网关存在可重用性差的问题,提出了一种基于S5PV210的矿井综合接入网关设计方案,介绍了网关的硬件结构和软件的设计,详细分析了多种协议之间的转换原理。该网关采用S5PV210微处理器、嵌入式操作系统和Socket软件技术实现了无线网络、现场总线网络、控制设备与工业以太网的互联,完成了多种协议之间的互转。     

IPv6在矿井工业以太网中的应用研究

介绍了IPv6产生的背景和发展现状,阐述了IPv6应用于矿井工业以太网的发展趋势和研究方向,指出对于所有基于矿井工业以太网的硬件和软件的开发都应带有双协议栈,随着IPv6技术的成熟和普及再研发出只有IPv6协议栈的适用于煤矿的网络设备,如支持IPv6的防爆网络设备、组态软件以及相应的数据采集驱动设备、控制硬件等。     

三相电压不平衡情况下电机车整流技术的研究

针对煤矿井下直流电机车变流系统中存在三相电压不平衡而使传统的PWM整流器的交流侧出现负序电流分量的问题,提出了一种在三相电压不平衡情况下抑制PWM整流器交流侧负序电流分量的控制策略;详细介绍了该控制策略的具体实现。仿真及现场实验结果表明,采用该控制策略后,PWM整流器的交流侧电流波形基本接近正弦波形,实现了单位功率因数运行。