摘要
为研究袁店二矿7_(2)22综采工作面内断层对采空区漏风流场的影响,采用采空区预埋束管和双示踪技术相结合的方法,对该下行通风工作面采空区内气体流场进行了试验研究。结果表明:从老风巷密闭墙漏入采空区进风侧"三角煤柱"的漏风强度要比从工作面进风隅角的漏风强度更大;老风巷外密闭墙内漏风风流是由"三角煤柱"流向采空区机、风巷;工作面试验断层在采空区内起到了类似"封堵墙"的作用,导致在7_(2)22工作面采空区进风侧局部区域内构成回风系统,使得从工作面进风隅角漏入采空区的风流又很快从工作面进风侧区域流回至工作面,而在试验断层后方的漏风流,大部分从漏风通道直接流向采空区回风侧,并从回风隅角流出。
To study the influence of faults in 7_(2)22 fully mechanized working face of Yuandian No.2 mine on air leakage flow field in goaf.An experimental study on the airflow field in downward ventilation goaf was carried out by using the embedded bundle tube and double tracer technology.The air leakage intensity of the"triangular coal pillar"leaking into the air inlet side from the closed old air lane wall is stronger than the air inlet corner;the air leakage flow inside the closed wall outside the old air lane flows from the"triangular coal pillar"to the goaf machine and the air lane;and the faults in the working face test play a similar role of"plugging wall"in the goaf area,which results in the entry of the goaf area of 7_(2)22 working face.The local area of the wind side constitutes a return air system,which makes the airflow leaking into the goaf from the air inlet corner return quickly to the working face from the air inlet area,while the leakage airflow behind the test fault mostly flows directly from the air leakage passage to the air return side of the goaf and from the corner of air return.
作者
程亚东
戴广龙
骆大勇
唐明云
周亮
CHENG Yadong;DAI Guanglong;LUO Dayong;TANG Mingyun;ZHOU Liang(School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China;Chongqing Vocational Institute of Engineering,Chongqing 402260,China)
出处
《煤炭技术》
CAS
北大核心
2022年第2期162-165,共4页
Coal Technology
基金
国家自然科学基金资助项目(51574009,51774014)
重庆市教委科学技术研究项目资助(KJQN201803401)。
关键词
工作面断层
双示踪气体
漏风流场
漏风通道
危险区域
working face fault
dual tracer gas
air leakage flow field
air leakage channel
hazard area
