Abstract:In most mining roadways,the floor is mainly composed of mudstone. The mudstone can slake severely under the conditions of unloading,weathering,water and external load effect. With the scanning electron microscopy(SEM) and X-ray diffraction(XRD),the main mineral components of mudstone are analyzed. Based on the analysis of SEM,the mechanism of mudstone argillization is studied. To stabilize the slaking mudstone,a practicable solidified agent is developed. The effect and mechanism of the agent are also studied in detail. In general,the stabilized mudstone may slake once again under the conditions of water and loading. To prevent the mudstone from re-slaking,a kind of polypropylene fiber is used to reinforce the mechanical behaviors of the solidified mudstone. Some unconfined uniaxial compression tests are conducted. Experimental results show that the polypropylene fiber can improve the mechanical behavior of solidified mudstone,especially the tensile strength and water resistance. With the SEM analysis,the fibers play two important roles in stabilization. A single fiber works through its surface bounding with slaking particles,i.e. surface friction effect. A bundle of fibers just work as a spatial frame. This frame not only restricts the fibers each other,but also supplies active constraint to solidification particles.