“U+L”型通风系统条件下采空区三维流场实验研究  

Experimental study on gob three-dimensional flow field of “U+L”ventilation system

作　　者：蔡佳文[1,2,3] 杨胜强[1,2,3] 焦汉林[1,2,3] 秦毅[1,2,3] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116 [2]中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116 [3]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《煤炭工程》2016年第8期89-92,共4页Coal Engineering

基　　金：国家自然科学基金项目(51174198);煤炭资源与安全开采国家重点实验室自主课题项目(SKLCRSM11X01)

摘　　要：基于采空区三维流场模拟实验台,进行了U型和"U+L"型通风系统模拟实验研究。通过改变进回风压力差及尾巷联络巷与工作面的距离,分析不同参数下的采空区压力场和瓦斯浓度场的分布规律。实验结果表明:采空区漏风强度与进回风压差有一定关联;高瓦斯区主要集中在偏向回风侧的压实区内,其位置及范围随通风参数的改变而变化,在现场可对此区域进行重点抽采;缩短尾巷联络巷距工作面步距,可在一定程度上控制采空区内高瓦斯区域的范围。The paper studied ＂U＂ type and ＂U＋L＂ type ventilation system by the offshore module ＂Test Rig of Three- dimensional Flow Field＂. By changing the distance between connection roadway and working face, the pressure between the intake airway and return airway, gas distribution law of gob is analyzed under different parameter. The results show that the gob air leakage intensity is linked with the pressure between the intake airway and return airway. High gas zone mainly distributes in the compaction zone side of return air roadway. Its location and range change along with the variation of ventilation parameters, and gas drainage in this area should be emphasized in the site. Shortening the distance between tail connection roadway and working face, to some extent, can control the range of high gas zone in goal.

关 键 词：U+L型通风 采空区三维流场 漏风强度 压力场 瓦斯浓度场 

分 类 号：TD724[矿业工程—矿井通风与安全]