Shandong Bureau of the National Mine Safety Administration
Zaozhuang Mining(Group)Co.

为了解决采空区漏风造成遗煤自燃的难题,提出了一种煤矿井下调整采空区两端压差的方法,对滕东煤矿通风系统现状进行分析。以均压防灭火机理为依据,设计滕东煤矿均压防灭火工艺方案,利用连通管将各封闭空间互相连接,以此维持封闭空间的压力,保持采空区两端压力平衡,达到防止向采空区漏风供氧的目的。通过在滕东煤矿的井下现场试验,均压防灭火技术能够使密闭内外压力差降到0~20Pa,使采空区密闭内外压力达到均衡,阻止气体的逸出,有效防止向采空区漏风供氧,从而防止采空区遗煤发生自燃,在滕东煤矿取得较好的防治效果。

In order to solve the problem of coal spontaneous combustion caused by air leakage in the goaf, a method for adjusting the pressure difference at both ends of the goaf underground in coal mines is proposed, analyze the current situation of the ventilation system in Tengdong Coal Mine. Based on the mechanism of pressure equalization fire prevention and extinguishing, design a pressure equalization fire prevention and extinguishing process plan for Tengdong Coal Mine. By connecting each enclosed space with a connecting pipe, the pressure of the enclosed space is maintained, ensuring a balanced pressure at both ends of the goaf and preventing air leakage and oxygen supply to the goaf. Through on-site testing in Tengdong Coal Mine, the pressure equalization and fire prevention technology can reduce the pressure difference between the inside and outside of the closed area to 0-20 Pa, achieve equilibrium between the inside and outside of the closed goaf, prevent gas leakage, effectively prevent air leakage and oxygen supply to the goaf, and thus prevent spontaneous combustion of residual coal in the goaf. The pressure equalization fire extinguishing technology has achieved good prevention and control effects in Tengdong Coal Mine.