在粉尘颗粒气固两相流运动理论研究的基础之上,基于ANSYS Fluent软件,从多尘源角度出发,针对长压短抽混合式通风的岩巷掘进工作面,以掘进机截割破碎产尘为主要产尘源、落岩扬尘、装载扬尘为叠加尘源,进行了多尘源粉尘颗粒叠加扩散规律...在粉尘颗粒气固两相流运动理论研究的基础之上,基于ANSYS Fluent软件,从多尘源角度出发,针对长压短抽混合式通风的岩巷掘进工作面,以掘进机截割破碎产尘为主要产尘源、落岩扬尘、装载扬尘为叠加尘源,进行了多尘源粉尘颗粒叠加扩散规律数值模拟。结果表明,掘进机截割过程中,截割主尘源在通风风流的影响下,绝大部分截割粉尘颗粒随抽风侧风流回流,并先后与落岩扬尘与抽风侧装载扬尘叠加后扩散并趋于稳定,少量截割粉尘颗粒在回风风流的影响下先后与落岩扬尘以及进风侧装载扬尘产生叠加扩散,在扩散趋于稳定后部分粉尘颗粒受回风风流影响,沿掘进机体向后方扩散,部分则滞留积聚在进风风筒下侧,缓慢沿壁面向巷道后方扩散。On the basis of the theoretical study of gas-solid two-phase flow of dust particles, based on ANSYS Fluent software, from the perspective of multiple dust sources, numerical simulation of the superposition and diffusion law of dust particles from multiple dust sources was carried out for the rock tunnel excavation working face with long pressure and short suction mixed ventilation, using the main dust sources of cutting and crushing by the excavator, rock falling dust, and loading dust as the superimposed dust sources. The results showed that during the cutting process of the tunneling machine, the main dust source was affected by the ventilation airflow, and the vast majority of the cutting dust particles flowed back with the exhaust side airflow, and then diffused and stabilized with the falling rock dust and the loading dust on the exhaust side. A small number of cutting dust particles were affected by the return airflow and diffused successively with the falling rock dust and the loading dust on the inlet side. After the diffusion stabilized, some dust particles were affected by the return airflow and diffused backward along the tunneling body, while others were trapped and accumulated on the lower side of the inlet air duct, slowly diffusing along the wall towards the rear of the roadway.展开更多
文摘在粉尘颗粒气固两相流运动理论研究的基础之上,基于ANSYS Fluent软件,从多尘源角度出发,针对长压短抽混合式通风的岩巷掘进工作面,以掘进机截割破碎产尘为主要产尘源、落岩扬尘、装载扬尘为叠加尘源,进行了多尘源粉尘颗粒叠加扩散规律数值模拟。结果表明,掘进机截割过程中,截割主尘源在通风风流的影响下,绝大部分截割粉尘颗粒随抽风侧风流回流,并先后与落岩扬尘与抽风侧装载扬尘叠加后扩散并趋于稳定,少量截割粉尘颗粒在回风风流的影响下先后与落岩扬尘以及进风侧装载扬尘产生叠加扩散,在扩散趋于稳定后部分粉尘颗粒受回风风流影响,沿掘进机体向后方扩散,部分则滞留积聚在进风风筒下侧,缓慢沿壁面向巷道后方扩散。On the basis of the theoretical study of gas-solid two-phase flow of dust particles, based on ANSYS Fluent software, from the perspective of multiple dust sources, numerical simulation of the superposition and diffusion law of dust particles from multiple dust sources was carried out for the rock tunnel excavation working face with long pressure and short suction mixed ventilation, using the main dust sources of cutting and crushing by the excavator, rock falling dust, and loading dust as the superimposed dust sources. The results showed that during the cutting process of the tunneling machine, the main dust source was affected by the ventilation airflow, and the vast majority of the cutting dust particles flowed back with the exhaust side airflow, and then diffused and stabilized with the falling rock dust and the loading dust on the exhaust side. A small number of cutting dust particles were affected by the return airflow and diffused successively with the falling rock dust and the loading dust on the inlet side. After the diffusion stabilized, some dust particles were affected by the return airflow and diffused backward along the tunneling body, while others were trapped and accumulated on the lower side of the inlet air duct, slowly diffusing along the wall towards the rear of the roadway.
