Study On The Roadway Floor Heave Mechanism And Control Technology Of Soft And Fragmental Surrounding Rock In Zhuxianzhuang Coal Mine

With the increasing of depth and roadway section, roadway floor heave phenomenon is more and more salient, and has become a technique problem which need to settle quickly and a notable feature of rock pressure of such roadway.Takeâ…¡5 return airway in Zhuxianzhuang Coal Mine for example, the paper has summarized and analyzed the previous research fruits and used five methods to study the roadway floor heave mechanics and controlling technology of soft and fragmental surroundings which are theoretical analysis,similar material simulation experiment,numerical analysis,industry and laboratory experiment.The paper has analyzed the property and contents of the typical sample in the mine, and analyzed the microstructure of the rock sample using TEM experiment; summarized the main influence factor to the roadway floor heave which are wall rock behavior of the floor,rock pressure,water,supporting resistance and section figure of the roadway; constituted a mechanical model of floor stress state, and got the floor heave result under horizon and vertical stress; analysed rheology specialty of extrusion and fluid roadway floor heave in soft and fragmental surroundings; simulating and analyzing the distortion and destruct area of the roadway surroundings by similar material simulation experiment; simulating and analyzing different kinds of roadway section shape such as Circular arch,Rectangle,Horse-shoe arch and Horse-shoe with Invert Roadway using creep model"viscous"of software FLAC, contrasting the effect of supporting; designed the roadway supporting form based on the idea of grading process control technology and strengthening support technique instrument. Locale observation indicates a good status of the roadway supporting. The study of the paper has definite reference to roadway floor heave of soft and fragmental surroundings.