一、建立水平分区通风系统的出发点西华山钨矿是一座具有将近六十年开采历史的老矿山,矿岩含矽量很高。解放前,国民党反动派勾结帝国主义,实行掠夺式开采,一无通风系统,二无防尘措施,劳动条件恶劣,矽尘危害深重。解放后,在毛主席党中央的亲切关怀下,向矽尘展开了坚决的 I. The Starting Point for Establishing Horizontal Zoning Ventilation System Xihuashan Tungsten Mine is an old mine with nearly 60 years of mining history. The ore rock contains a high amount of silicon. Before the liberation, the reactionaries of the Kuomintang colluded with imperialism and practiced predatory exploitation, with no ventilation system, no dust-proof measures and poor working conditions, thus endangering the people. After the liberation, under the cordial concern of Chairman Mao Zong-hui, the Central Committee of the Communist Party of China launched a resolute stance toward silica dust