Laboratory experiment and studying on bidirectional pneumatic DTH hammer

In order to illustrate the application future of virtual prototyping technology in geological engineering machinery,a pneumatic DTH hammer was selected as an example to be simulated and evaluated with the sof.

Differential-volume DTH was presented in the paper,which was totally different to traditional pneumatic DTH hammer with two-side inlet-exhausted structure,the energy efficiency and work efficiency are anticipated 20% higher than DTH hammer.

CJ-130 two-way pneumatic DTH is a new type drilling machine,which has been successfully applied to the construction in the field of anchor engineering.

According to sticking accident in anchorage hole drilling in landslide stratum,a pneumatic DTH was developed with two-way impact.

Visual Software System Development on Pneumatic DTH Design;

The Modal Analysis of Pneumatic DTH Short Drillstring;

cone bit/disc cutter drilling method, percussive drilling method (no circulation and reverse circulation) and air/fluid powered DTH drilling method, is described with concrete proposals initiated for increasing the technical level of large diameter rock socket drilling.

The principle of air DTH hammer is a drilling method to use compressed air as circulatory medium to flush borehole,cool bits,bring cuttings from bottom to surface.