论文部分内容阅读
一、前言新乡地区吴村煤矿系年产40多万吨的扩建矿井,自1973年左右恢复生产以来,长期使用两台70B_2型轴流式主扇并联工作。前段时期,两台风机同时工作的总风量每分钟可达1500立方米,后来发现风量大幅度下降到900多立方米,仅与一台风机单独工作时的风量相差无几。致使井下风量不足,影响矿井正常生产。
I. Introduction The Wucun coal mine in Xinxiang area has an annual output of over 400,000 tons of expanded coal mines. Since the resumption of production in about 1973, two 70B_2 axial-flow main fans have been used for a long time in parallel. In the previous period, the total air volume of two turbines working at the same time could reach 1,500 cubic meters per minute. Later, it was found that the air volume dropped drastically to more than 900 cubic meters and the air volume was only similar to that of a single fan when working alone. As a result, the air volume in the underground is insufficient, affecting the normal production of the mine.