综放开采偏W型通风系统及工作面参数优化研究  

Partial W type ventilation system and its parameters optimization of longwall mining with sublevel caving

作　　者：李英明[1,2] 徐继成[1] 张瀚[1] 杨明东[1] 付永刚 

机构地区：[1]煤矿安全高效开采省部共建教育部重点实验室(安徽理工大学),安徽淮南232001 [2]安徽理工大学矿业工程博士后流动站,安徽淮南232001 [3]段王煤业集团有限公司段王煤矿,山西晋中045400

出　　处：《采矿与安全工程学报》2014年第3期483-488,共6页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51004002);中国博士后科学基金项目(2013M541812)

摘　　要：针对高瓦斯工作面采用传统U型通风上隅角瓦斯超限问题,提出了偏W型通风系统,采用数值模拟方法研究了这一通风系统瓦斯流场特征,及在保证回采安全前提下,进行了最大限度提高回采率的工作面参数优化研究。结果表明:采用偏W型通风系统,其工作面、回风流、上隅角瓦斯体积分数明显降低,有效地解决了U型通风瓦斯超限问题,可保证工作面的安全开采。煤柱留设宽度15 m能够保证掘进和回采期间煤柱稳定,研究成果的现场应用保证了工作面安全高效开采。这一通风系统可为其他高瓦斯综放面安全高效开采提供了一条新的技术途径。In view of methane overrun with U type ventilation, Partial W type ventilation system is put forward. Gas emission law is studied by numerical simulation. Working face parameter is optimized to improve extraction rate as much as possible on the premise of mining safety. Research results show that gas concentration of working face, return current and upper corner drop sharply and methane overrun problem with U type ventilation is solved effectively;when coal pillar is 15 m wide, it will be stable in the course of drifting and mining. Field application of above findings ensures safety and high efficiency mining. The ventilation system provides a new method to realize the safe and efficient mining of high gas longwall mining with sublevel caving.

关 键 词：综采放顶煤 偏W型通风系统 数值模拟 煤柱宽度 

分 类 号：TD724[矿业工程—矿井通风与安全]