基于时间尺度的综采工作面粉尘运移规律研究
|
摘要
为探究综采工作面在不同时间尺度与空间结合下粉尘的运移规律,运用ANSYSFLUENT求解器对其进行数值模拟,分析截割产尘20、40、80 s后综采面不同空间位置的粉尘浓度分布及运移轨迹,并通过现场实测验证模拟结果的准确性。结果表明:前滚筒中心至下风侧10.3 m,底板上方2.1 m至顶板的架前空间以及前滚筒中心至下风侧45.1 m、底板上方0.9 m至顶板的人行道空间出现最大风速分别为3.1、2.7 m/s的高速风流区。随着产尘从20 s增至80 s后,前滚筒截割尘流由采煤机道涌入架前及人行道的位置由其中心下风侧4.1、10.3 m分别缩减至2.1、6.2 m,后滚筒截割尘流的污染区域由其中心下风侧39.8 m逐渐覆盖架前及人行道的全断面空间。
In order to explore the movement laws of dust production in different time scales and space combination in fully mechanized coal mining face, ANSYS-FLUENT solver was used to carry out numerical simulation. The dust concentration distribution and trajectory in different space positions of fully mechanized coal mining face after cutting dust production 20 s, 40 s and 80 s were analyzed, and the accuracy of simulation results was verified by field measurement. The results show that high-speed air flow zones with maximum wind speeds of 3.1 and 2.7 m/s respectively occur in the front drum center to the downwind side 10.3 m, the frame front space from 2.1 m above the bottom plate to the roof, the sidewalk space from the center of the front drum to the downwind side 45.1 m, and the sidewalk space from 0.9 m above the bottom plate to the roof. With the increase of dust production from 20 s to 80 s, the positions of the front drum cutting dust flow from the shearer lane to the front of the shelf and the sidewalk are reduced from 4.1 m and 10.3 m to 2.1 m and 6.2 m respectively at the downwind side of the center, and the pollution area of the back drum cutting dust flow is gradually covered by 39.8 m at the downwind side of the center.
In order to explore the movement laws of dust production in different time scales and space combination in fully mechanized coal mining face, ANSYS-FLUENT solver was used to carry out numerical simulation. The dust concentration distribution and trajectory in different space positions of fully mechanized coal mining face after cutting dust production 20 s, 40 s and 80 s were analyzed, and the accuracy of simulation results was verified by field measurement. The results show that high-speed air flow zones with maximum wind speeds of 3.1 and 2.7 m/s respectively occur in the front drum center to the downwind side 10.3 m, the frame front space from 2.1 m above the bottom plate to the roof, the sidewalk space from the center of the front drum to the downwind side 45.1 m, and the sidewalk space from 0.9 m above the bottom plate to the roof. With the increase of dust production from 20 s to 80 s, the positions of the front drum cutting dust flow from the shearer lane to the front of the shelf and the sidewalk are reduced from 4.1 m and 10.3 m to 2.1 m and 6.2 m respectively at the downwind side of the center, and the pollution area of the back drum cutting dust flow is gradually covered by 39.8 m at the downwind side of the center.
引文
[1]时训先,蒋仲安,褚燕燕.煤矿综采工作面防尘技术研究现状及趋势[J].中国安全生产科学技术,2005,1(1):41-43.
[2]聂百胜,李祥春,杨涛,等.工作面采煤期间PM2.5粉尘的分布规律[J].煤炭学报,2013,38(1):33-37.
[3]李德文,马骏,刘何清.煤矿粉尘及职业病防治技术[M].徐州:中国矿业大学出版社,2007.
[4]姚锡文,鹿广利,许开立,等.基于FLUENT的大倾角综放面通风降尘系统[J].东北大学学报,2014,35(10):1497-1501.
[5]程卫民,聂文,周刚,等.煤矿高压喷雾雾化粒度的降尘性能研究[J].中国矿业大学学报,2011,40(2):185.
[6]赵丽娟,田震,王野,等.采煤机外喷雾系统数值模拟研究[J].煤炭学报,2014,39(6):1172-1176.
[7]聂文,刘阳昊,程卫民,等.综采面架间喷雾引射除尘技术[J].中南大学学报,2015,46(11):4384-4390.
[8]白若男,张琦,于海明,等.综采工作面风速对粉尘分布规律影响的数值模拟分析[J].煤矿安全,2015,46(9):180-183.
[9]王洪胜,谭聪,蒋仲安,等.综放面多尘源粉尘分布规律数值模拟及实测[J].哈尔滨工程大学学报,2015,47(8):106-112.
[10]周刚,张琦,白若男,等.大采高综采面风流-呼尘耦合运移规律CFD数值模拟[J].中国矿业大学学报,2016,45(4):684-693.
[2]聂百胜,李祥春,杨涛,等.工作面采煤期间PM2.5粉尘的分布规律[J].煤炭学报,2013,38(1):33-37.
[3]李德文,马骏,刘何清.煤矿粉尘及职业病防治技术[M].徐州:中国矿业大学出版社,2007.
[4]姚锡文,鹿广利,许开立,等.基于FLUENT的大倾角综放面通风降尘系统[J].东北大学学报,2014,35(10):1497-1501.
[5]程卫民,聂文,周刚,等.煤矿高压喷雾雾化粒度的降尘性能研究[J].中国矿业大学学报,2011,40(2):185.
[6]赵丽娟,田震,王野,等.采煤机外喷雾系统数值模拟研究[J].煤炭学报,2014,39(6):1172-1176.
[7]聂文,刘阳昊,程卫民,等.综采面架间喷雾引射除尘技术[J].中南大学学报,2015,46(11):4384-4390.
[8]白若男,张琦,于海明,等.综采工作面风速对粉尘分布规律影响的数值模拟分析[J].煤矿安全,2015,46(9):180-183.
[9]王洪胜,谭聪,蒋仲安,等.综放面多尘源粉尘分布规律数值模拟及实测[J].哈尔滨工程大学学报,2015,47(8):106-112.
[10]周刚,张琦,白若男,等.大采高综采面风流-呼尘耦合运移规律CFD数值模拟[J].中国矿业大学学报,2016,45(4):684-693.