Mining roadway roof different-level control method

The invention relates to a mining roadway roof different-level control method. Roadway roof caving is controlled in four levels, wherein auxiliary supporting materials are used for preventing surface layer roof detritus from falling off; a high-density anchor rod with the normal length controls falling of shallow part roof dangerous rock and local roof leakage; a high-extensibility lengthened anchor rod or a middle-long anchor cable is used for maintaining the whole stability of surrounding rock in a roof plasticity area, and preventing harmful expansion of the surrounding rock in the roof plasticity area and roof large-block caving; a long anchor cable controls large-range instability and collapse of the deep part layer roof during tunneling, and reinforces the surrounding rock in the plasticity area again. A main support parameter determining method for the high-extensibility lengthened anchor rod, the middle-long anchor cable and the long cable is provided. Meanwhile, a different-level support way can be adopted, the roadway roof safety can be effectively ensured, the roadway forming speed can be obviously increased, and the method has the important significance in ensuring safety and high efficiency of mining production.