岩巷综掘工作面通风除尘系统的数值模拟

陈举师, 蒋仲安, 谭聪

(教育部金属矿山高效开采与安全重点实验室(北京科技大学),100083 北京)



摘要:

为了解决岩巷综掘工作面粉尘质量浓度超标的问题,对比分析已制定的通风除尘系统布置方案,以薛村矿南翼皮带运输巷为背景,依据气固两相流理论,运用计算流体力学的离散相模型(DPM)对岩巷综掘工作面通风除尘系统进行数值模拟,并与现场实测数据进行对比分析,模拟结果与实测数据基本一致．研究表明:粉尘颗粒自尘源产生后,纵向随风流方向运动,横向随机扩散;掘进巷道内粉尘质量浓度沿程先急剧上升至最大值,后逐步缓慢降低;通风除尘系统布置方案中,降尘效果按优劣排序为二者同时安装、安装附壁风筒、安装除尘器、压入式通风．根据现场实测数据,以压入式通风条件为基准,安装附壁风筒、安装除尘器及二者同时安装条件下平均除尘率分别为49.4％、67.1％及86.2％．

关键词:  岩巷  综掘工作面  气固两相流  通风除尘  数值模拟

DOI：10.11918/j.issn.0367-6234.2015.02.018

分类号:TD714.2

基金项目:国家自然科学基金(51274024);中央高校基本科研业务费专项资金(FRF-TP-14-039A1);中国博士后科学基金(2014M560891).



Numerical simulation of dust removal and ventilation system in the rock comprehensive tunneling face

CHEN Jushi, JIANG Zhongan, TAN Cong

(The Key Laboratory of Ministry of Education for High Efficiency Exploitation and Safety of Metal Mine(University of Science and Technology Beijing), 100083 Beijing, China)

Abstract:

To solve the problem that the dust concentration exceeds on the rock comprehensive tunneling face, the dust fall plan is established according to comparative analysis for improving working environment. On the background of belt transport lane in the south of Xue village mine, the discrete phase model (DPM) for computational fluid mechanics is used for numerical simulation of dust movement rule on rock comprehensive tunneling face on the basis of the gas-solid two phase flow theory. In contrast to the field measured data, the simulation result almost conforms to the measured data. The study found that, after dust source generated, the dust moves with air flow direction on vertical, random diffuses along the merry tangential direction on transverse. The frictional dust concentration in roadway drivage rises sharply to maximum, then gradually slows down. In comprehensive dust fall scheme, the order of the dust fall effect, according to quality, is: both installation at the same time, installation of mural ram, installation convulsions shaker system, press in type ventilation. According to the measured data, taking the press condition ventilation as reference, the average removal rates of installing air duct, installing dust collector and installing the two at the same time are 49.4％, 67.1％ and 86.2％, respectively.

Key words:  rock roadway  fully mechanized excavation face  gas-solid two phase flow  dust removal by ventilation  numerical simulation