综掘工作面通风控尘参数匹配关系研究及应用

Research and Application of Ventilation and Dust Control Parameters Matching in Fully Mechanized Driving Face

针对综掘工作面产尘量大,降尘效率不佳等问题,基于气固两相流原理、流体力学,研究长压短抽分流压风除尘系统的最佳匹配参数。以羊场湾Ⅱ020605综掘面为研究背景,采用FLUENT数值模拟软件,研究长压短抽分流控尘时巷道内部粉尘分布和运移规律,对比分析了轴径向压风比、附壁风筒位置、整流风筒位置对粉尘运移规律的影响。研究发现:羊场湾Ⅱ020605综掘面,在轴径向压风比为1∶3,附壁风筒距迎头11~13 m,整流风筒距迎头6~8 m时,能够有效地控制粉尘扩散,极大降低巷道粉尘质量浓度,综合降尘效率超过92%,保证了作业人员的工作环境质量。

In view of the problems of large dust production and poor dust reduction efficiency in fully mechanized excavation face,based on the gas-solid two-phase flow principle and fluid mechanics,the optimal matching parameters of long pressure short suction and split flow compressed air dust removal system are studied.Taking Yangchangwan Ⅱ 020605 fully mechanized driving face as the research background,uses FLUENT numerical simulation software to study the dust distribution and migration law in the roadway when the long pressure and short suction is used to separate and control the dust.The influence of axial and radial pressure air ratio,the position of wall attached air duct and the position of rectification air duct on dust migration rule is compared and analyzed.The results show that:when the ratio of axial and radial air pressure is 1:3,the distance between the wall attached air duct and the head-on air duct is 11 to 13 m,and the distance between the rectification air duct and the head-on is 6 to 8 m,the dust diffusion can be effectively controlled and the dust concentration in the roadway can be greatly reduced.The comprehensive dust reduction efficiency is more than 92%,which ensures the working environment quality of the workers.