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一、矿井反风前的基本情况 白皎煤矿为平硐、立井开拓,盘区开采,年产65万吨。沼气涌出、煤与沼气突出和自燃都比较严重。采用多进风口、多分区主扇联合运转的通风系统(见附图)。东、南风井的主扇都是2.4米的轴流式风机。西风井的主扇是1.8米的轴流式风机。动轮叶片安装角度分别是:东主扇为30°,南主扇为30°,西主扇为35°。各主扇都采用反风绕道和反风门的反风方式。由于总进风口较多(有主、副平硐和旧南风井),而且有多条大巷(东、西大巷和东、西改造大巷)分别与三个盘区沟通,故总进风网的风阻很小,三个盘区的阻力以西
First, the basic situation before the mine anti-wind Bai Jiao mine for the adit, vertical shaft development, panel mining, with an annual output of 650,000 tons. Biogas emission, coal and biogas salience and spontaneous combustion are more serious. The use of multi-air inlet, multi-division main fan operation of the ventilation system (see photo). The main fan of the east and south wind wells are all 2.4 m axial fans. Westerly main fan is 1.8 meters axial fan. The mounting angles of the rotor blades are respectively: 30 ° for the east main fan, 30 ° for the south main fan and 35 ° for the west main fan. The main fans are used anti-wind bypass and anti-wind door anti-wind way. As the total air inlet is more (main, secondary adit and the old southerly well), and there are a number of lanes (east and west lanes and east and west transformation of the lane) and the three panels respectively, so the total Wind resistance into the wind is very small, the resistance of the three panels west