综采工作面U型下行通风的适用性及其瓦斯抽采技术试验研究  

Applicability of U-type Downward Ventilation in Fully Mechanized Coal Face and Experimental Study on Gas Extraction Technology

作　　者：张劲松 ZHANG Jinsong(China Coal Technology and Engineering Group Chongqing Research Institute,Chongqing 400037,China)

机构地区：[1]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《煤炭技术》2022年第7期117-119,共3页Coal Technology

基　　金：“十三五”国家科技重大专项资助项目(2016ZX05043-005)。

摘　　要：对U型下行通风条件的适用性进行了分析、研究,影响下行通风实施的主要因素为瓦斯涌出量、煤层倾角、采高、工作面长度和工作面风速,研究表明:实施下行通风的工作面煤层倾角小于20°为最佳。试验表明:下行通风条件下在靠近采空区回风侧区域瓦斯浓度有明显的“一”字型分布特征,下行通风+“分支L型”埋管抽采工艺有效控制了回风隅角的瓦斯浓度,瓦斯抽采纯量提高了1.8倍左右,瓦斯治理效果有显著提升。The applicability of u-type downward ventilation condition is analyzed and studied,the main factors affecting the implementation of downward ventilation are gas emission,coal seam dip angle,mining height,face length and face wind speed,studies have shown the best inclined angle of coal seam is less than 20°.The tests showed that:under the condition of descending ventilation,the gas concentration in the area near the return air side of goaf has obvious "—" shape distribution characteristics,the gas concentration in the corner of the return air was effectively controlled by the down-ventilation "branch L" buried pipe extraction technology,the gas extraction purity has been increased about 1.8 times,the effect of gas control has been greatly improved.

关 键 词：下行通风 瓦斯风压 瓦斯抽采 分布特征 试验研究 

分 类 号：TD724[矿业工程—矿井通风与安全] TD712