大倾角煤层采空区N_(2)运移规律研究  

Research on N_(2) migration law in goaf of large inclined coal seam

作　　者：李文涛 赵小岗 董昊福 张玮 刘冬亮 史波波[2] 宋小林[2] LI Wen-tao;ZHAO Xiao-gang;DONG Hao-fu;ZHANG Wei;LIU Dong-liang;SHI Bo-bo;SONG Xiao-lin(Huating Coal Industry Group Co.,Ltd.,Pingliang 744100,China;China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]华亭煤业集团有限责任公司,甘肃平凉744100 [2]中国矿业大学,江苏徐州221116

出　　处：《煤炭科技》2024年第2期94-97,104,共5页Coal Science & Technology Magazine

基　　金：江苏省自然科学基金(BK20211585)。

摘　　要：基于东峡煤矿大倾角煤层的特点,构建了相似模拟实验系统,开展了不同倾角煤层采空区注N_(2)惰化实验,实验结果表明,采空区地板区域,沿着工作面走向方向,N_(2)运移后基本呈“L”型分布,且采空区深部N_(2)的分布影响范围更广;空间范围内,采空区走向上,N_(2)运移分布规律为高处范围广、低处范围窄的“倒梯形”。结合东峡煤矿37121-1工作面实际情况,得出应在运输巷采空区侧注N_(2),现场实际应用效果表面防灭火效果较好。Based on the characteristics of the large inclined coal seam in Dong-xia Coal Mine,a similar simulation experiment system was constructed to carry out N_(2) injection inertization experiments in the goaf of different inclined coal seams.The experimental results showed that in the floor area of the goaf,along the direction of the working face,the N_(2) migration exhibited a basic L-shaped distribution after transportation,and the distribution range of N_(2) in the deeper part of the goaf was wider.Within the spatial range,the distribution pattern of N_(2) migration in the goaf along the strike direction formed an inverted trapezoid shape,with a wider range in higher areas and a narrower range in lower areas.Combined with the actual situation of the 37121-1 working face in Dong-xia Coal Mine,it is concluded that N_(2) should be injected into the goaf on the lower side of the downstream entry,the actual application effect on-site has a good surface fire prevention and extinguishing effect.

关 键 词：大倾角煤层 采空区注N_(2) N_(2)运移规律 注N_(2)优化 

分 类 号：TD75[矿业工程—矿井通风与安全]