In view of the three-bifurcation-door supporting situation at the two lane exit of the working face, the damage causes and characteristics of three-bifurcation-door are analyzed and the three bifurcation door supporting technology is reformed, to solve the three-bifurcation-door support problem under the influence of mining pressure.%针对工作面两巷出口处三岔门支护现状，对三岔门的破坏原因及特征进行分析和研究，革新三岔门支护工艺，解决采动压力影响下三岔门支护难题。
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