The development of ZWC-95 mid-pressure air DTH hammer;

Inner Hole Obstruction Mechanism Analysis of DTH hammer;

Combining traditional DTH hammer with pneumatic rock drill,by reference to the rotational mechanism of rock drill,studies the rotational mechanism of DTH hammer and introduces a new type of DTH hammer that uses backstroke energy of piston to drive drill to rotate.

Drilling experimental study of run-through DTH in complicated broken stratum;

Experimental Research on Run-through DTH Counter-Circulation Drilling Technique;

Visual Software Development on Pneumatic DTH Design;

It is difficult to drill or can not drill if we use routine methods, using through down-hole hammer air drill method not only raise rate of drilling, but also reduce pollution to the aquifer, promoting exploration and development for the deep underground water.

By analysis of enforcement of drilling tools of air downhole hammer's following pipe, the factors affecting the drilling speed and depth of the following pipe are obtained.

Connecting with the practices of the shafting work in the water-source location of Sujigou, Zhungghar Banner, this paper expounds the technical details and drilling measures of the downhole hammer in the shafting process.

The down-the-hole hammer drilling is to use compressed air as circulation medium substituted conventional mud,has solved problems of coalfield sealed fire area exploration high temperature water burst in boreholes,burnt rock loosen and developed fissures,instable and easy to collapse,broke through low drilling efficiency in hard rocks.