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液压传动所使用的工作液必须是不可压缩的、粘性的和具有良好的润滑性。由于矿物油具有所需要的性能,而得到广泛的使用,但是矿物油容易发火並因此引起灾难性的事故。1956年8月8日在比利时的Marcinelle矿,由于一个罐笼撞坏了一条压力油管道和一根电缆引起了一场火灾,导致10个国籍的263名矿工死亡。1972年7月22日在美国的Blackvillc,由于短壁采煤机的油箱意外地触及架线而发火,这场火灾由于无法及时扑灭而导致9人死亡。矿井机械由于其不同的结构特点而具有不同程度的发火危险。根据其危险程度的不同,
The hydraulic fluid used in the working fluid must be incompressible, viscous and has good lubricity. Because of their desirable properties, mineral oils are widely used, but mineral oils can easily ignite and thus cause catastrophic accidents. On August 8, 1956, at the Marcinelle mine in Belgium, 263 miners of 10 nationalities were killed as a result of a fire that crashed a pressurized oil pipe and a cable in a cage. July 22, 1972 In Blackvillc, United States, nine people were killed as a result of inadvertent extinguishment of the short-cut shearer’s fuel tank on the wireline. Mine machinery because of their different structural characteristics and have different degrees of fire hazard. Depending on the degree of danger,