陈向军, 刘金钊, 司朝霞,等.切顶卸压留巷开采模式下工作面及采空区内风流运移特性[J].河南理工大学学报（自然科学版）,2020,39(6):1-9.

CHEN X J, LIU J Z, SI Z X, et al.Characteristics of air flow in working face and goaf under the mining mode of pressure relief by roof cutting of retaining gateway[J].Journal of Henan Polytechnic University(Natural Science) ,2020,39(6):1-9.

切顶卸压留巷开采模式下工作面及采空区内风流运移特性

陈向军1,2,3, 刘金钊2, 司朝霞4, 杜云飞2, 常廷豪5

1.河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地，河南 焦作 454000;2.中国矿业大学（北京）深部岩土力 学与地下工程国家重点实验室，北京 100083;3.煤炭安全生产河南省协同创新中心，河南 焦作 454000;4.河南理工大学 测绘与国土信息工程学院，河南 焦作 454000;5.神华神东煤炭集团哈拉沟煤矿，陕西 榆林 719315

摘要:针对切顶卸压留巷开采模式下工作面和采空区内风流运移特性不明确的现状，以哈拉沟煤矿12201回采工作面为工程背景，采用Fluent软件分别模拟工作面和采空区内风流运移，结果表明：切顶卸压留巷开采模式下，靠近工作面两端隅角处的采空区内分别存在一个较大涡流区，紧邻工作面的采空区内存在部分较小涡流区；采空区内风流与工作面及留巷内风流均存在质量交换现象；沿工作面倾向存在18 ~ 85 m和304 ~ 325 m 2个重点漏风区段，321 ~ 325 m为严重漏风区段；留巷内22 ~100 m和390 ~ 398 m为重点漏风区段，22 ~30 m为严重漏风区段。重点和严重漏风区段是工作面漏风重点防范区段，需制定封堵、引导风流措施。研究结果可为防范切顶卸压留巷开采工作面采空区漏风、瓦斯气体体积分数超限爆炸、煤层自燃提供参考。

关键词:切顶卸压留巷;Y型通风;数值模拟;风流运移

doi:10.16186/j.cnki.1673-9787.2020.6.1

基金项目:国家自然科学基金青年基金资助项目（51874122 ）；河南省高等学校重点科研项目（18A440004 ）；河南省高校科技创新团 队支持计划项目（17IRTSTHN030）；河南理工大学创新型科研团队支持计划项目

收稿日期:2020/01/16

修回日期:2020/03/26

出版日期:2020/11/15

Characteristics of air flow in working face and goaf under the mining mode of pressure relief by roof cutting of retaining gateway

CHEN Xiangjun1,2,3, LIU Jinzhao2, SI Zhaoxia4, DU Yunfei2, CHANG Tinghao5

1.State Key Laboratory Cultivation Base for Gas Geology and Gas Control（ Henan Polytechnic University） ，Jiaozuo  454000 ， Henan， China;2.State Key Laboratory Geomechanics and Deep Underground Engineering （ China University of Mining & Technology， Beijing） ， Beijing  100083 ， China;3.Collaborative Innovation Center of Coal Work Safety， Jiaozuo  454000 ， Henan， China;4.School of Surveying and Land Information Engineering， Henan Polytechnic University， Jiaozuo  454000 ， Henan， China;5.Halagou Coal Mining， Shenhua Shendong Coal Group Co. ， Ltd. ， Yulin  719315 ， Shaanxi， China

Abstract:In view of the current situation that the characteristics of air flow movement in the working face and retaining gateway are not clear under the mode of roof cutting and pressure relief， taking the 12201 working face of Halagou coal mine as the engineering background， the air flow movement rules in the goaf， working face and remaining gateway were simulated by FLUENT software. The results showed that there was a large eddy current area in the gob close to the corner of both ends of the working face and a small eddy current area in the gob close to the working face under the mode of roof cutting and pressure relief. There is mass exchange between the air flow in the gob and the air flow in the working face and retaining gateway. Two serious air leakage areas with 18~85 m and 304~325 m along the direction of the working face inclination 321~325 m was the serious air leakage section， the 22~100 m and 390~398 m in remaining gateway were the key air leakage areas ，and the 22~30 m was the key air leakage section. The key air leakage areas and sections were the key prevention areas for air leakage in the working face，and measures for blocking and guiding air flow should be taken.

Key words:pressure relief by roof cutting of retaining gateway;Y type ventilation;numerical simulation;air

切顶卸压留巷开采模式下工作面及采空区内风流运移特性_陈向军.pdf