Construction technology of shallow-buried faulted section in Qingdai tunnel;

Simulating of determining reasonable working resistance of support in shallow seam of thick clay layers;

Post-buckling behavior for roof strata in shallow seam longwall mining;

Study on catastrophe mechanism for roof strata in shallow seam longwall mining;

Study on stability of overburden stratum structure by numerical simulation for shallow coal seam;

Criterion of broken and limit stride calculation in shallow coal seam coved with thick loose layer;

Simulating test on damage regularities of thick sandy soil layer and load distribution on key roof block in shallow coal seams;