By describing close distance coal seam fully-mechnized mining, the paper analysed the effects of hydraulic supports and initial resistance and working resistance of the supports as well as the adoption to close distance coal seam mining.

Imaging at close distance leads to uneven illumination images in practical application.

Gas migration law of coal mining in seam with short distance to protection seam;

The application of the flexibility protective stand coal mining in steep slope, short distance and thin seam in Muchengjian Coal Mine proved that this method was effective in solving the difficulty of mining.

This paper presents a new calibration method of short distance precision of total station which is called indoor baseline, and discusses its measuring steps and data processing.

Roadway support at nearby seams in Wangcun mine;