风筒距迎头距离对掘进面风流场的影响研究  

Study on the Influence of the Distance between Air Duct and Heading Face on the Air Flow Field of Heading Face

作　　者：赵建明 刘伦伦 黎旭博 ZHAO Jianming;LIU Lunlun;LI Xubo(Shaanxi Zhengtong Coal Industry Co.,Ltd.,Xianyang713600,China)

机构地区：[1]陕西正通煤业有限责任公司,陕西咸阳713600

出　　处：《煤》2024年第8期6-10,16,共6页Coal

基　　金：国家自然科学基金面上项目(52174194)。

摘　　要：矿山开采机械化、自动化、智能化水平的提高,使得矿井产尘量急剧增长,严重威胁了矿工生命健康和仪器的使用寿命。而压入式通风的风筒出风口距离巷道迎头的位置可直接影响具体的通风效果。为此,以高家堡煤矿1号回风大巷掘进工作面为研究背景,通过现场详细的勘探对比,建立等比例物理模型,模拟风筒位置对整体巷道的通风效果,结果表明:当风筒的位置设置在距离迎头1 m、3 m、5 m时,压风筒出口处风速为17.8 m/s、16.2 m/s、15.3 m/s;距离迎头50 m处风速为11.6 m/s、6.4 m/s、5.2 m/s;巷道后部的风速为8.7 m/s、6.6 m/s、4.6 m/s.工作面整体风速逐渐降低;随着风筒距迎头距离增加,在掘进机迎头处以及压风筒出风口处粉尘质量浓度逐渐升高,靠近迎头位置的高浓度粉尘占比增大,粉尘质量浓度降低的效果并不明显。With the improvement of mining mechanization,automation and intelligentization,the mine dust output increases rapidly,which threatens the life and health of miners and the service life of instruments.However,the distance between the outlet of forced ventilation duct and the roadway head-on position can directly affect the specific ventilation effect.Therefore,based on the research background of No.1 return air roadway heading face in Gaojiapu Coal Mine,through the detailed exploration and comparison on the spot,an equal-scale physical model is established to simulate the ventilation effect of the location of air duct on the whole roadway,the results show that the air velocity at the outlet of the pressure duct is 17.8 m/s,16.2 m/s,15.3 m/s,when the position of the pressure duct is set at a distance of 1 m,3 m,5 m from the head.The wind speed at the distance of 50 m is 11.6 m/s,6.4 m/s,5.2 m/s and the wind speed at the back of tunnel is 8.7 m/s,6.6 m/s,4.6 m/s.With the increase of the distance from the air duct to the head,the dust concentration at the head of the roadheader and at the outlet of the air duct gradually increases,and the proportion of the high-concentration dust near the head-on position increases,the effect of dust concentration reduction is not obvious.

关 键 词：掘进工作面 风筒布局 粉尘防治 数值模拟 

分 类 号：TD714.4[矿业工程—矿井通风与安全]