Y型通风工作面流场及瓦斯场分布特征的分区量化  

Partition quantization of flow field and gas field distribution characteristics in"Y-type"ventilation working face

作　　者：和树栋 He Shudong(State Key Laboratory of Coal Mine Disaster Prevention and Control,Chongqing 400037,China;CCTEG Chongqing Research Institute,Chongqing 400037,China)

机构地区：[1]煤矿灾害防控全国重点实验室,重庆400037 [2]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《能源与环保》2024年第7期21-26,33,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：中煤科工集团重庆研究院有限公司重点研发项目(2022ZDXM09);中国煤炭科工集团有限公司重点研发项目(2022-2-TD-ZD010)。

摘　　要：为掌握Y型通风工作面的流场和瓦斯涌出规律特征,依据黎曼积分原理,建立了风流、瓦斯的几何模型和平衡方程。以霍尔辛赫Y型通风工作面为研究对象,提出了流场的分区定量测定方法,研究了Y型通风工作面的风流分配及漏风量的空间特征,进而得到了采面瓦斯涌出量的构成及分布。研究表明:①采面的漏风率平均值为8.31%;采面风流场分为2个区段,工作面前0~100 m为漏风严重区段,需要采取措施减少漏风量;在工作面100~220 m出现反风现象,漏风小且稳定。②工作面的瓦斯涌出来源主要是煤壁及落煤,约占总瓦斯的93.5%,需加强煤层瓦斯预抽,以减少生产时的落煤及煤壁瓦斯涌出。③支架后瓦斯浓度大于采面瓦斯浓度,两者差值为0.044%~0.148%,越靠近回风侧,差距越大,需重点关注回风留巷中的瓦斯浓度,防止瓦斯超限事故发生。In order to research the flow field and gas emission law characteristics of a"Y-type"ventilation working face,a geometric model and balance equation for airflow and gas based on the Riemann integral principle were established.Taking the"Y-type"ventilation working face of Huoerxinhe as the research object,a quantitative zoning measurement method for the flow field was proposed.The spatial characteristics of the airflow distribution and air leakage of the"Y-type"ventilation working face were studied,and the composition and distribution of gas emissions from the mining face were obtained.It was concluded that:①the average air leakage rate of the mining face was 8.31%.The airflow field of the mining face was divided into two sections.The 0-100 m section in front of the working face was a severe air leakage section requiring measures to reduce air leakage.Reverse wind phenomenon occured at 100-220 m of the working face,with small and stable air leakage.②The main source of gas emission from the working face was the coal wall and coal falling,accounting for approximately 93.5%of the total gas.It was necessary to strengthen the pre-drainage of coal seam gas to reduce coal falling and coal wall gas emissions during production.③The gas concentration after hydraulic support was higher than that of the mining face,with a difference of 0.044%-0.148%.The closer the location was to the return air side,the greater the difference.It was necessary to pay attention to the gas concentration in the return airflow of the retaining roadway to prevent gas exceeding the limit.

关 键 词：Y型通风工作面 黎曼积分 分区量化 漏风 瓦斯 

分 类 号：TD712[矿业工程—矿井通风与安全]