高层建筑消防炮弹道特性分析与射表编制

高层建筑消防炮主要是为应对高层火灾而研制的一种消防设备.高层建筑消防炮采用气动方式实施远距离发射,灭火弹出膛后在空中自由飞行直至侵彻建筑物玻璃进入火场后起爆灭火.基于高层建筑灭火炮的工作特点,研究了灭火弹在诸力作用下的运动规律,建立了弹道数学模型,结合算例进行了求解.弹道模型主要描述了内弹道过程、标准外弹道分析和非标准气象条件下的外弹道过程.根据所得弹道诸元编制了射表,确定了射表搜索策略,为消防炮控制提供了必要参数.     

Introduction of firefighting methods in U.S. underground mines

Underground mine fire always exists since the mining activity was practiced.It poses a severe safety hazard to the mine workers and may also cause a tremendous economic loss to the mines.Methods for controlling and extinguishing fires in underground mine have long been studied and there have been significant improvements.In order to know clearly about the firefighting technology used,this paper summarizes most of the underground mine firefighting methods used in the United States the past 150 years.This paper describes not only the accepted firefighting theories,but also the technologies,both direct and indirect attacking,in accordance to regulations or codes,with special attention is given to the indirect attack method and its related technologies.Further research needed is also briefly discussed at the end of this paper.     

自动喷水灭火系统在现代城市消防中的运用

就自动喷水灭火系统的组成，论述了现阶段自动喷水灭火系统在城市消防中的运用情况，及存在的问题。     

平庄古山矿厚煤层开采防灭火技术应用

结合平庄煤业集团公司古山矿自然发火严重的实际问题，论述了均压、黄泥灌浆、回采推进速度、封堵井下漏风、填堵地表裂隙等各项防灭火技术手段在厚煤层分层回采工作面的实际应用过程和方法，这些防灭火手段在古山矿均取得了较好的防灭火效果，现场应用时，应结合现场实际，采用一种或几种防灭火方法，以达到防灭火的目的和要求的效果。     

凝胶泡沫防灭火材料的研制及应用

由于大倾角坚硬顶板煤层采空区地质条件复杂,漏风规律复杂多变,因而煤自燃危险性较大,必须采取有针对性的防灭火措施。通过理论分析和实验研究,确定了凝胶泡沫材料中合适的发泡剂、稳泡剂、胶凝剂、交联剂。通过实验得到凝胶泡沫材料的最佳配方为:发泡剂为月桂酸钠和SDS按2:3比例复配,浓度为0.6%;稳泡剂CMC浓度为0.1%;胶凝剂AM浓度为0.3%;交联剂MBA浓度为0.3%。经过程序升温实验和封堵实验,该凝胶泡沫具有优良的防自燃阻化性能和封堵性能。在东龙煤矿7162工作面采空区灌注凝胶泡沫材料进行防灭火。现场监测结果表明,凝胶泡沫材料有效抑制了采空区自燃,保证了安全开采。     

新型冷气溶胶灭火剂灭火性能的研究

为防止对臭氧层的破坏,哈龙灭火剂先后在多国宣告停止使用。随之出现了很多哈龙灭火剂的替代产品,冷气溶胶灭火剂就是其中之一,但因其制备过程中,超细颗粒的表面能较高,易团聚,现有的制备工艺通常是在超细颗粒中加入一些改性剂,以降低其表面能,从而使其满足使用的要求。而本文提出了一种新型的冷气溶胶制备方案,通过将灭火物质NH4H2PO4溶于水中,并利用高压气体喷射形成气溶胶,通过不同组实验的对比,发现不同浓度、压力及出口直径,对灭火效果均有显著影响,通过本次试验,取得了一定的研究成果,为冷气溶胶灭火剂的大规模使用提供了一种创新性的思路。     

真空断路器的使用和维护

无油化改造工程在我厂的实施，扩大了真空断路器的应用范围。论述了真空断路器的使用特点、使用维护过程中应注意的问题，并指出不仅要重视设备的更新改造而且要重视设备的检修和维护，才能确保其良好运行。     

基于BP网络的锅炉燃烧系统控制

文章提出了一种基于BP神经网络的锅炉炉膛火焰温度的灭火预警、报警系统。燃烧火焰图像由CCD摄像机、传像光纤和图像卡采入计算机,经预处理后由训练过的神经网络计算出锅炉的温度,计算结果通过A/D转换器来达到锅炉系统的控制。     

Experimental study on fire extinguishing with a newly prepared multi-component compressed air foam

A multi-component compressed air foam system (MCAFS) was developed with newly prepared multi-component foaming agents. Extinguishing of wood crib and oil pool fires was performed under different conditions, such as foam concentration, mixing chamber forepart structure and working pressure. It was found that the foam concentration had sufficient effects on fire extinguishing efficiency, and an optimized concentration value exists. For instance, for diesel oil pool fires, this value is about 2.2% while it is about 4.0% for wood crib fires. The results also show that the system with a coaxial mixing chamber has greater efficiency than a T-shape. The effects of working pressure on fire extinguishing are evident in experiments, i.e., the higher the working pressure is, the more readily the fire is extinguished. Supported by the Natural Science Foundation of China (Grant No. 50774072), National Key Technology R&D Program (No. 2006BAK06B07) and Program for New Century Excellent Talents in University (No. NECT-07-0794)