一、国内电气安全情况概述1、矿井电气事故的原因分析在矿井电网中,电缆是最薄弱的环节。一个年产百万吨的矿井,高、低压电缆遍布整个矿井,总长达几十公里甚至上百公里。与沼气接触的机会最多。尤其是低压橡套电缆,最容易受到机械损伤。受损的电缆或漏电、或打火、或短路燃弧、或引起电缆着火酿成火灾、或引起瓦斯(煤尘)爆炸。 First, an overview of the domestic electrical safety situation 1, mine electrical accident analysis In the mine power grid, the cable is the weakest link. An annual output of 1 million tons of mines, high and low voltage cables throughout the mine, a total length of tens of kilometers or even hundreds of kilometers. The most opportunities to contact with biogas. In particular, low-voltage rubber cables, the most vulnerable to mechanical damage. Damaged cables or leakage, or ignition, or short circuit arcing, or cause the cable fire caused by fire, or cause gas (coal dust) explosion.