浅埋煤层大采高工作面地表裂隙漏风研究  

Study on air leakage from surface cracks on shallow-buried working face with large mining height

作　　者：叶正亮 尚博 胡冕 郭曦蔓 汪海涛 YE Zhengliang;SHANG Bo;HU Mian;GUO Ximan;WANG Haitao(China Coal Energy Research Institute Co.,Ltd.,Xi'an,Shaanxi 710054,China;China Coal Xi'an Design Engineering Co.,Ltd.,Xi'an,Shaanxi 710054,China)

机构地区：[1]中煤能源研究院有限责任公司,陕西省西安市710054 [2]中煤西安设计工程有限责任公司,陕西省西安市710054

出　　处：《中国煤炭》2024年第8期72-77,共6页China Coal

摘　　要：为了掌握浅埋煤层大采高工作面采空区上方地表裂隙漏风规律,通过地表裂隙考察、SF 6示踪气体现场测试、数据拟合分析等方法进行地表漏风特征分析,并制定专项漏风防控措施进行治理。结果表明:大采高工作面采空区上方距离工作面20 m以上的粘土层地表区域,容易发育形成长期稳定的张开型和塌陷型裂隙;不同区域地表裂隙漏风风速呈现回风侧塌陷型裂隙>中部张开型裂隙>进风侧塌陷型裂隙,且分别距离工作面584、539、487 m后漏风风速基本为零;通过对地表裂隙回填压实和井下回风侧采空区注浆堵漏,在降低上隅角CO浓度的同时增加了O_(2)浓度,有效抑制了采空区的遗煤自燃,减少了采空区惰性气体的涌出。In order to master the air leakage law from surface cracks above the goaf of shallow-buried working face with large mining height,surface cracks investigation,SF6 tracer gas field test,data fitting analysis and other methods were used to analyze the characteristics of surface air leakage,and special air leakage prevention and control measures were developed.The results showed that the surface area of clay layer,which was over 20 m away from the goaf of the working face with large mining height,was easy to develop and form long-term stable opening mode and collapse mode cracks;the air leakage speed of the surface cracks in different regions decreased from high to low as follows:collapse mode crack near the return airway,opening mode crack in the middle of the goaf,collapse mode crack near the inlet airway,and the air leakage speed of different cracks was basically zero after 584 m,539 m and 487 m away from the working face,respectively;through backfilling compaction of surface cracks and grouting plugging of goaf on the return airway side in the underground mine,the concentration of CO at the upper corner was reduced while the concentration of O_(2) was increased,which effectively inhibited the spontaneous combustion of residual coal in the goaf and reduced the emission of inert gas in the goaf.

关 键 词：浅埋煤层 大采高工作面 地表裂隙 SF_(6)示踪气体 遗煤自燃 

分 类 号：TD753[矿业工程—矿井通风与安全]