Prediction and evaluation on building damages of strip pillar mining under villages;

Determination of surface subsidence prediction parameters for strip pillar mining

Based on the specific geological and mining conditions and the status of Nanying buildings,the results show that it is feasible and reasonable to extract the coal reserves under village using strip pillar mining method in this coal mine,and the strip pillar mining plans and their parameters were presented.

Research on surface movement parameters of strip-partial mining;

Coal pillar stability of deep and high seam strip-partial mining;

Whether the strip coal pillar is stable or not is one of the key problems of strip-partial mining.

Dimension design of coal pillar with weak plane in strip mining;

Deformation features of a roadway affected by strip mining;

Numerical simulation of overlying strata and ground movement value induced by strip mining below thin bedrocks;

Numerical analysis on ascending mining in coal seam group with shallow burying and near interval;

Study and application of ascending mining method in Daming No.1 Coal Mine;

Under the instruction of this thought,the surface subsidence law and ascending mining law were analyzed and compared.

Analysis on the damage zone of overlying strata and safety layer distance on the upward mining above the longwall goaf

Feasibility on the upward mining of the left-over coal above goaf with pillar supporting method

According to the actual condition of geology and character parameter of rock mechanics,the feasibility on upward mining of 1-2 seam of yima mine was studied.