据初步调查，事故系矿井下电缆短路引发火灾。
An initial investigation indicates the fire was caused by a short circuit in underground cables.
调查人员说，由于断电，矿井内的通风设备停止运行，矿井内瓦斯积聚。
Investigators say gas accumulated during a power outage that shut down the mine's ventilation system.
据调查，当前矿井设计过程中，遇到该类求解问题时，多是通过作图法粗略求解。
According to the investigation, during the current mine designing, when meet such problems mostly solve it by the method of making diagram.
应用推荐