山西某矿U型通风工作面采空区漏风及防控技术研究  

Air Leakage and Control Technology in the U-shaped Ventilation Working Face of A Mine in Shanxi Province

作　　者：刘旺 张孟浩 LIU Wang;ZHANG Menghao(Shanxi Datong University,Datong 037009,China)

机构地区：[1]山西大同大学,山西大同037009

出　　处：《山西煤炭》2024年第1期57-63,共7页Shanxi Coal

基　　金：山西大同大学2022年研究生教育创新项目(22CX49)。

摘　　要：针对山西某矿8203综采工作面采空区火灾隐患问题,建立了U型通风采空区三维模型,运用CFD软件模拟1 m/s、2 m/s、3 m/s和4 m/s不同风速下综采工作面采空区速度场状态,根据模拟结果对综采工作面风量进行计算并分析漏风原因;最后根据模拟结果提出相应的防控策略以防止采空区煤自燃。研究结果表明:工作面进风端水平距离0~30 m,为综采工作面采空区漏风主要区域;采空区漏风时,进风侧漏风较严重,已发生煤自燃现象;在进风速度为3 m/s且高度相同时,采空区氧化面积最大。结合煤矿实际情况,在进风侧采空区实施堵漏风防灭火技术、注浆防灭火和注氮防灭火联合防控技术,提高矿井开采安全性。Given the fire hazard in the goaf of the No.8203 fully mechanized mining face of a mine in Shanxi province,we established a three-dimensional model of U-shaped ventilation to simulate the velocity field of goaf with wind speeds of 1 m/s,2 m/s,3 m/s,and 4 m/s with CFD software.According to the simulation results,we calculated the air volume of the mining face,analyzed the causes of air leakage,and finally proposed the control strategies to prevent the coal spontaneous combustion in goaf.The results showed that the air leakage area of the working face was mainly within the horizontal distance of 0 to 30 m from the air inlet side of the working face.When the air leakage occurred,the air leakage on the air inlet side was more serious,and spontaneous coal combustion occurred.When the wind speed was 3 m/s with the same height,the oxidized area of the goaf was the largest.In the context of the actual situation,combined prevention and control technologies were implemented in goaf on the inlet side to improve the mining safety,including air leakage plugging,grouting,and nitrogen injecting fire extinguishing technology.

关 键 词：采空区 煤自燃 U型通风 漏风 防控技术 

分 类 号：TD752.2[矿业工程—矿井通风与安全]