0前言随着采煤自动化程度的提高,现在液压支架的使用也越来越普遍,起来越广泛,在50年代,液压系统的工作压力很少超过70Kg/cm2。现在普遍达到200～300Kg/cm2。在这样高的压力下,从破裂油管喷出的液压油往往呈雾状,只要遇上300～400℃热表面就会着火。[1]从安全角度出发,现在液压支架普遍使用水包油型乳化液。乳化液通常是指两种互不相溶的 0 Introduction With the increasing degree of automation of coal mining, the use of hydraulic supports is now more and more common and more widespread. In the 1950s, the operating pressure of hydraulic systems rarely exceeded 70 kg / cm2. Now generally reach 200 ~ 300Kg / cm2. Under such high pressure, the hydraulic oil sprayed from the ruptured pipe is often in the form of mist, so long as it meets the hot surface of 300-400 ° C, it will catch fire. [1] From a safety standpoint, oil-in-water emulsions are now commonly used in hydraulic stents. Emulsions are usually two types of immiscible