大垂距双层采空区流场平衡控制技术  

Control Technology of Flow Field Balance in Double-layer Goaf with Large Vertical Distance

作　　者：杜春宁 宁德义 姜文忠 DU Chunning;NING Deyi;JIANG Wenzhong(China Coal Research Institute, Beijing 100013, China;China Coal Technology and Engineer Group Shenyang Research Institute, Fushun 113122, China;Stale Key Lab oratory of Coal Mine Safety Technology, Fushun 113122,China)

机构地区：[1]煤炭科学研究总院,北京100013 [2]煤科集团沈阳研究院有限公司,辽宁抚顺113122 [3]煤矿安全技术国家重点实验室,辽宁抚顺113122

出　　处：《煤矿安全》2019年第2期152-155,共4页Safety in Coal Mines

摘　　要：为了解决大垂距火区下综放面均压通风防治上部火区有害气体下泄时将采空区瓦斯压入火区引发次生灾害的问题,采用理论研究的方法,对大垂距双层采空区流场平衡的控制条件进行分析,确定了双层采空区流场平衡的安全调节区间。在同忻煤矿西8101工作面进行应用,结果表明:当连接双层采空区的U型水柱计压差满足(350+0.016l,538+0.016l),l∈(85,1 600)时,工作面上隅角CO体积分数在回采期间始终保持在24×10-6以下,有效地保障工作面的安全回采。In order to solve problem of the secondary disaster caused by the goaf gas pressed into the fire area when the method of pressure balancing ventilation is used to prevent the harmful gas of upper fire area discharge in the fully mechanized caving surface under large vertical distance fire area, by using the method of theoretical research, the control condition of flow field balance in double-layer goaf with large vertical distance is analyzed, and the safe adjustment interval of flow field balance in double-layer goaf is determined. It is applied in the western 8101 working face of Tongxin Coal Mine, and the results show that,when the gauge pressure difference of U-shaped water column connecting the double-layer goaf meets(350+0.016 l,538+0.016 l),l ∈(85,1 600), the volume fraction of CO at the corner of the working face is always kept below 24 ×10^-6 during the mining period, which effectively guarantees the safe mining of the working face.

关 键 词：特厚煤层 上部火区 气体下泄 流场平衡 均压通风 

分 类 号：TD752.2[矿业工程—矿井通风与安全]