The 1~(st) domestic hydraulic umbrella drill is therefore introduced to accelerate drilling velocity with obvious effect as a new breakthrough for drilling and blasting.

In this paper, the blasting and drilling techniques are improved in the following aspects: drilling by umbrella driller, charging with plastic pipes, detonating with non-electrical detonators.

There are a great deal energy losing when hydraulic drilling machine working.

An analysis on structure of hydraulic wagon drill's working mechanism;

The coal seam hydraulic drill can replace coal electric drill,of coal seam composed of this gear motor will replace electric coal drill,and will be widely used for drilling of coal face.