CAJ | 학술논문

以高庄煤矿3上1109综放工作面为例,根据气固两相流理论,采用Fluent软件模拟了移架风速、产尘源高度和产尘源浓度变化时粉尘浓度的变化规律. 研究表明,粉尘浓度随着风速的增大呈减小趋势,处于紊流区的粉尘浓度受风速影响较小;同一位置处粉尘浓度随着产尘源高度的增大而减小,处于紊流区的粉尘浓度受产尘源高度影响不大;只改变产尘源的质量流率,沿z轴方向粉尘浓度变化趋势一致;由于处于紊流区的粉尘受影响比较大,与煤壁距离不同位置处粉尘浓度变化情况不同. 数值模拟粉尘浓度变化规律与现场采样结果相吻合. 综合考虑风速和尘源质量流率的影响,研究了移架作业粉尘浓度沿程分布的拟合函数.
이고장매광3상1109종방공작면위례,근거기고량상류이론,채용Fluent연건모의료이가풍속、산진원고도화산진원농도변화시분진농도적변화규률. 연구표명,분진농도수착풍속적증대정감소추세,처우문류구적분진농도수풍속영향교소;동일위치처분진농도수착산진원고도적증대이감소,처우문류구적분진농도수산진원고도영향불대;지개변산진원적질량류솔,연z축방향분진농도변화추세일치;유우처우문류구적분진수영향비교대,여매벽거리불동위치처분진농도변화정황불동. 수치모의분진농도변화규률여현장채양결과상문합. 종합고필풍속화진원질량류솔적영향,연구료이가작업분진농도연정분포적의합함수.
The variation law of the dust concentration in the change process of the wind speed during support advance, the height of dust source and the dust concentration at the dust source was simulated with Fluent software by taking No. 1109 fully mechanized caving face of 3 up seam in Gaozhuang Coal Mine as an example and based on the theory of gas-solid two-phase flow. Research showed that the dust concentration reduced with the increase of wind speed, and the dust concentration in the turbulent region was less affected by the wind speed;the dust concentration at the same location decreased with the increase of the height of dust source and the dust concentration in the turbulent region was less affected by the height of the dust source;when the mass flow rate at the dust source was merely changed, the change trend of the dust concentration in the direction of z axis was consistent;since the dust concentration in the turbulent region was subjected to great influence, the change of the dust concentration at the locations in different distance to the coal wall was different. The variation law of the dust concentration obtained by numerical simulation was basically coincident with the measured results, Based on the comprehensive consideration of the influence of the wind speed and the mass flow rate, research was made on the fitting function of dust concentration distribution during support advance operation.