附壁风筒出风口参数对掘进工作面控尘效果的影响  

Influence of outlet parameters of wall attached air duct on dust control effect in heading face

作　　者：王建国 李尧尧 WANG Jianguo;LI Yaoyao(College of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China)

机构地区：[1]西安科技大学安全科学与工程学院,陕西西安710054

出　　处：《煤矿安全》2023年第10期50-55,共6页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51904231)。

摘　　要：为明确径向出风式附壁风筒出风口宽度、径轴向出风比对综掘工作面控尘效果的影响,以冯家塔煤矿某综掘工作面为原型,运用FLUENT软件,对建立的长压短抽式通风综掘巷道模型进行数值模拟,并对模拟结果进行现场验证。结果表明:保持压抽比为1.3,径向出风口长为0.8 m时,随着出风口宽度增加,巷道空间内的粉尘浓度先减小随后增大,改变出风口宽度,当出风口宽度为0.05 m时,司机处粉尘浓度降至100 mg/m^(3),距掘进工作面20 m巷道内基本无粉尘,控尘效果最佳;保持最佳出风口宽度为0.05 m,随着径轴向出风比变小,巷道内粉尘浓度先减小后增大,当径向轴向出风比为1:2时,粉尘被集中控制在负压抽吸区,掘锚机司机位置处粉尘浓度降至1.2 mg/m^(3),此时径向出风式附壁风筒控尘效果最佳。In order to clarify the influence of the air outlet width and the ratio of radial and axial air outlet of the wall attached air duct on the dust control effect of the fully mechanized face,taking a fully mechanized face in Fengjiata Coal Mine as the prototype,the numerical simulation of the long pressure and short extraction ventilation roadway model is carried out by using FLUENT software,and the simulation results are verified on the spot.The results show that when the pressure extraction ratio is kept at 1.3 and the length of the radial air outlet is 0.8 m,with the increase of the width of the air outlet,the dust concentration in the roadway space first decreases and then increases,and the width of the air outlet is changed.When the width of the air outlet is 0.05 m,the dust concentration at the driver is reduced to 100 mg/m^(3),20 m away from the heading face,there is basically no dust in the roadway,and the dust control effect is the best.Keeping the optimal outlet width of 0.05 m.As the radial and axial air outlet ratio decreases,the dust concentration in the roadway first decreases and then increases,when the radial and axial air outlet ratio is 1∶2,the dust is centrally controlled in the negative pressure suction area,and the dust concentration at the driver’s position of the anchor digger decreases to 1.2 mg/m^(3).At this time,the radial outlet wall attached air duct has the best dust control effect.

关 键 词：附壁风筒 出风口宽度 出风比 混合式通风 控尘效果 

分 类 号：TD714[矿业工程—矿井通风与安全]