2. The national invention patent of outburst prevention coal mining method with multiple protective layers applied to coal seam group mining.
3. National invention patent of "gas drainage method for coal seam roof".
4. The national invention patent "Method of pressure relief gas in overlying long-distance mining area by synchronous pre-pumping in the whole layer of surface drilling".
5. National invention patent "Method of gas extraction while pumping in coal seam roadway".
6, deep roadway surrounding rock fracture simulation device, national invention patent.
7, hydraulic jack and loading system, invention patent.
8. A coal mine ventilation and collection device, with an invention patent.
9. Gas extraction device and hydraulic support in the upper corner of coal mining face, invention patent.
10, gas ground filling device suitable for model test, invention patent.
1 1, coal seam water injection system, invention patent.