IQQ空间背景音乐的设置方法.docVIP

QQ空间背景音乐最简单的一招，首先下载你要设置的音乐到你的电脑，然后打开你的浏览器输入以下网址： /up/info_oper.php?tag=fs2you 然后上传你的音乐到这个网站，然后就可以在网站的底部找到QQ空间背景音乐的链接了。 本设计矿井为大雁矿业集团大雁二矿1.2 Mt/a新矿井设计，共有2层可采煤层17#、25#。设计采用以双立井为主的开拓方式，采区内17#、25#层联合布置开采。采煤方法为走向长壁采煤法，采煤工艺为综合机械化采煤工艺，顶板处理方法为全部垮落法。 矿井通风方式为中央边界式，通风方法为抽出式，采区通风系统为轨道上山和运输上山进风，回风上山回风，采煤工作面采用“U”型上行式通风，掘进工作面采用压入式通风。矿井在容易时期总进风量66.969 m3/s，总阻力993.022 pa，等级孔2.373 m2，属于容易通风；在困难时期总进风量69.888 m3/s，总阻力1794.003 pa，等级孔1.942 m2，属于中等通风。本设计选择主要通风机型号为FBCDZ-8-No22C，共有两台电动机，型号分别为YBFe355L2－8 、YBFe450S3－8。 根据设计矿井的基本情况和通风系统，初步提出了瓦斯、火灾、顶板、热害等灾害的防治措施。 关键词： 矿井通风通风阻力等积孔通风系统通风设计 Abstract This thesis is a presentation about the Geese mining group‘s child mining that is named Geese Second Mining Group .The mine is designed that the coal of yields is 1200, 000 t in a year. The mining is designed to adopts primarily associated exploiting manner of the double shaft. 17#, 25# coal bed is mined respectively by driving a set of slopes in each coal seam. The longwall retreating working is applied, the mining technics of integrative mechanization is used and in the gob area all roof breaks down and falls. The ventilative way of mine is divisional ventilation and the working method of fan is exhausting . Panel ventilation system for rail up the hill and transportation up the hill into wind, return air went up into the mountain return air, coal face the U type ventilation uplink, the heading face pressed into the type ventilation. Air quantity of 66.969 m3/s is afforded to mine in the easy ventilated period , wind resistance is 993.022 pa,the area of Levelhole is 2.373 m2.Air quantity of 69.888 m3/s is afforded to mine in the hard ventilated period, wind resistance is 1794.003 pa,the aera of Levelhole is 1.942 m2. The design chooses one axial FBCDZ-8-No22C ventilator and the ventilator is equipped two YBFe355L2－8 、YBFe450S3－8 electromotor. According to the design and the basic situation of mine ventilation system, This paper puts forward the measures about how to prevent the gas, fire, roo