in this paper, methane distribution law of in goaf and down-corner angle of Wu-21191 fully-mechanized coal faces is analyzed and studied by using mathematical simulation and actually measurement, thus providing theory base for comprehensive controlling methane in this coal face.

Gas accumulation automatic monitoring-processing method on upper corner of fully mechanized coal mining face;

The study on the Numerical Simulation and determination of parameters in gas control at the upper corner in U-Type ventilation face;

Study on low-concentration methane disposal at upper corner based on PSA

The effective and feasible fuction of gas auumulation mining face top corner are improved.

Aimed at top corner gas management at the low gas blasting face,by upper goaf drainage with decompression in self coal seam,the experience is tried,the effect is obvious.

Aim at the problem of top corner gas big at work face,seriously influences safety and restrains production,the method of direct drawing top corner gas has been proved sucessful.

The gray dynamic forecasting model research applies in the top corner gas consistence;

Optimization of top corner gas content prediction and control method;

The influence factors in the excavate coal face top corner corner's gas consistence were analyzed,and authors consider that the change of top corner gas consistence is affected and restricted by many factors,it is difficult to describe its variety rule.

The study of influence of the crossbeam and corner prop on shear-lag in the thin-wall curve box beams;

The influence of the crossbeam and the corner has been explored in the beeline box beams which have different width-to-span ratio.