煤矿井下长期采用单回路的供电系统,局部通风机经常由于供电线路故障而停风,致使井下工作面常常发生瓦斯积聚和超限事故。经过专业技术人员的论证及实验,将供电系统改造成双回路方式,可极大地降低因供电线路故障而引发的瓦斯积聚和超限,更加降低瓦斯爆炸的可能性。 Coal mine long-term use of single-loop power supply system, local fan often stop due to power supply line failure, resulting in downhole face often occur gas accumulation and overrun accident. After professional and technical personnel’s demonstration and experiment, the power supply system is transformed into a double-circuit mode, which can greatly reduce the gas accumulation and over limit caused by the failure of the power supply line and further reduce the possibility of gas explosion.