(2) through the vein roadway - every 15 to 20 meters to open a pulse. The veins are arranged at the high boundary of the mine and the column, and the mine and the column share a vein. This arrangement saves the amount of mining work by arranging a pulse through each of the mine room columns.
(3) Flow mines - According to the length of the mine, at least two mines should be arranged in one mine.
(4) Filling wells - A filling well is arranged in the middle of the mine. The section is 2 × 2 m 2 and the inclination is 80 ° ~ 90 °. The pipe side and the ladder are set. It is one of the safety exits.
(5) Pedestrian dewatering wells - A mine has a dewatering well. Its structural requirements are: should meet the requirements of water discharge.
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