The single hydraulic prop for the external supply of constant resistance type single hydraulic prop, it can be matched with various top beam, can also make use of column. For the blasting mining face supporting the roof, also can do other temporary supporting the use of.

The single hydraulic prop for coal seam dip angle is less than the inclined coal seam mining working face 25 degrees --35 degrees, the adaptation of the coal seam roof and floor conditions is: the roof behind does not affect the pillar recovery, the bottom should not be too soft, integrity pillar pressure into the floor depth is not deteriorated plate should be added, or large base.

Within the mining face in coal more loose cannon, to take measures to protect the active column body surface coating, to prevent the collapse. Pillar and the wooden bar with or do some column when in use, should be changed into the column top hat, so as not to damage the wooden beams.