【摘要】 为了研究长压短抽通风条件下湿喷施工作业产尘在掘进巷道空间内的弥散规律,应用Fluent软件中的离散相模型,对湿喷中的初喷施工产尘、复喷施工与凿岩机破岩同时作业时产尘进行数值模拟,得到了粉尘在巷道中的弥散规律。研究结果表明:压风侧初喷作业粉尘质量浓度高于抽风侧初喷作业粉尘质量浓度,且掘进巷道端头附近尤为明显;压风侧或抽风侧复喷施工与凿岩机破岩同时作业时,粉尘质量浓度变化规律均为沿程先降低,后因复喷作业而升高,然后再降低。根据粉尘弥散规律,提出了相应的防尘建议,以减轻粉尘对施工作业人员的危害。更多还原

【Abstract】 In order to study the dispersion rule of wet-spraying dust in excavation roadway under far-pressing-nearing-absorption,the discrete phase model in Fluent software was applied to simulate the dust production in the initial spray of wet spraying,dust production as spray construction and drill break the rock at the same time,the dispersion law of dust in roadway was obtained. Research results show that the dust concentration of the press air side initial spray is higher than the air pumping side initial spray,and it is particularly obvious near the end of the excavation roadway; when the press air side or air pumping side multiple spray and drill breaks the rock at the same time,the change rule of dust mass concentration is first reduced along the exit direction of the roadway,then increased due to multiple spray produces dust,and then decreased again. According to the rules of dust dispersion,some suggestions are made to reduce the damage of dust to workers.更多还原