Aiming at the actuality of plentiful pressed coal under buildings and environment polluted by the piled coal refuse on the ground in our country,based on the analysis of the current mining methods under buildings,the tunnel mining with coal refuse backfilling under buildings was presented.

The spot observation research on the surrounding-rock deformation laws of roadway in fully-mechanized sub-level caving mining face;

Research on Destruction Mechanism and Supporting in Roadway of the Steep Coal Seam of Taiping Coal Mine;

The roadway deformation mechanism and establishment of mechanical model of thick seam

Stability analysis of the mining roadways with bolt supporting;

Study on the strata and fracture features of surrounding rocks and the bolting effect in actual mining roadways;

Theoretical determination of bolt pre-tightening force on the bolt combined effect in the roof of mining roadway

Coupling support technology with bolt/steel mesh/anchor for deep mining gateway in Jining No.2 Mine;

Practices on floor heave prevention and control technology of mining gateway in Wuyang Mine;

Practices on bolt support for mining gateway under geological conditions of broken surrounding rocks;

Influenced of coal pillar width on deformation and fracture of gateway surrounding rocks in fully mechanized top-coal caving mining;

Numerical simulation on stability of gateway under the influence of the thickness of immediate roof;

Study on taking shotcrete precautions against gateway fire in fully mechanized mining with sublevel caving;

Based on the experiment by using split rockbolt support at Peifeng Mine Yanwu +35m-21#,Fujian Coal and Electricity Corporation,the paper proves that split rockbolt support in developing entry has advantages over the traditional support and other rockbolt supporting types.