小保当一号煤矿采空区垂直漏风规律研究

Study on vertical air leakage law in goaf of Xiaobaodang No.1 Coal Mine

小保当一号煤矿112207工作面埋藏浅、易自燃,受采动影响极易形成裂隙与地表沟通,给工作面煤自燃防治带来了压力。为保障煤矿安全生产,更好地开展小保当一号煤矿112207工作面自燃的防治工作,利用SF_(6)示踪气体检漏技术,对112207工作面进行现场漏风观测,分析得出其地表垂直漏风规律,采空区对应地表漏风范围工作面后240~466 m;通过计算得到,采空区对应地表位置沿工作面倾向距回风巷越近,漏风程度越大;沿工作面走向距工作面越远,漏风程度越小;相邻采空区之间存在内部水平漏风,根据所得规律提出相应的漏风控制措施,降低采空区外部漏风的可能性。

The 112207 working face of Xiaobaodang No.1 Coal Mine is shallowly buried and prone to spontaneous combustion.Under the influence of mining,it is easy to form cracks and communicate with the surface,which brings pressure to the prevention and control of coal spontaneous combustion in the working face.In order to ensure the safe production of the coal mine and better carry out the prevention and control of spontaneous combustion in the 112207 working face of Xiaobaodang No.1 Coal Mine,the SF_(6) tracer gas leak detection technology was used to conduct on-site air leakage observation on the 112207 working face,and the surface vertical air leakage law was analyzed:The corresponding surface air leakage range of the goaf is 240~466m behind the working face;According to the calculation,the closer the corresponding surface position of the goaf is to the air return roadway along the working face,the greater the degree of air leakage;The farther away from the working face along the direction of the working face,the smaller the degree of air leakage;There is internal horizontal air leakage between adjacent goafs,and corresponding air leakage control measures are proposed according to the obtained laws to reduce the possibility of external air leakage in goafs.