Method and device for carrying out grouting between adjacent gateroads in internal-staggered split-level coal mining

A method for carrying out grouting between adjacent gateroads in internal-staggered split-level coal mining, the method comprising:

• excavating a roadway;
• drilling grouting holes;
• and
• performing grouting through the grouting holes while excavating the roadway;
• wherein a stoping coal seam is a thick coal seam;
• a return air gateroad of a stoping face and an inlet air gateroad of a heading face are not on the same level;
• the return air gateroad of the stoping face is arranged along a roof of the stoping coal seam;
• the inlet air gateroad of the heading face is arranged along a floor of the stoping coal seam;
• there is a height difference between the return air gateroad of the stoping face and the inlet air gateroad of the heading face in a vertical direction;
• and during construction, the inlet air gateroad of the heading face is excavated at a delay distance of 180-200 m from the return air gateroad of the stoping face such that an inlet air gateroad of the heading face is excavated after the return air gateroad of the stoping face is stable;
• and
• wherein each gateroad is a roadway created by excavating the roadway;
• drilling grouting holes;
• and performing grouting through the grouting holes while excavating the roadway.