DTH Down The Hole Hammer Drilling Mission 30

Product Details

Product introduction

1. Drill model: MD30/MD-50/MD-80
The utility model relates to a drilling rig which belongs to a high torque and full hydraulic power head drill.
The slope of a hydropower station, railway or highway project, drilling grouting, can also be used to prevent or solve geological disasters, such as landslides, landslides, etc..
2. Drilling ability, wide application range, rapid drilling speed and high drilling efficiency, and strong ability of handling the accident.
3 rig structure independent design, fast and convenient installation and transportation.
4. The rig is suitable for various drilling methods such as carbide bit drilling, auger drilling, DTH hammer drilling, follow-up casing drilling, etc.


Hole depth 50-60m
Rod dia 110-180mm
Hole angle(°) -1-90°
Output rotary speed of power head Forward: 20/40/56/111/167r/min
Reverse: 20/40/56/111/167r/min
Stroke of power head 1700mm
Output torque of power head 2000N.m
Lifting force of power head 25KN
Feeding force of power head 17kN
Power Electric motor: 18.5KW
Weight 1200KG
Dimensions (L×W×H) 2978×700×1205mm

Pipe roof method is an advanced supporting structure for shallow underground excavation in underground structure engineering. Its essence is buried in arc arch lining implicit quasi excavation of the underground tunnel or structural engineering, pre drilled and thick wall steel pipe installation high inertia, temporary shoring, prevent soil collapse and surface subsidence, excavation and support to ensure the follow-up process safety operation.

Pipe roof support method is a newly developed technology for tunnel excavation in soft rock. Pipe roof method was first used as an auxiliary method of tunnel construction, through the loose belt, belt, soft ground breaking in soft rock tunnel, inflow of water, sand play an important role. Because the embedded piperoof roof and side wall support. To lay a solid foundation for the follow-up of the tunnel excavation, and the construction speed, high safety, short construction period. The construction method is considered to be the most effective and reasonable solution of roof collapse in tunnel construction.

DTH Hammer Drilling /DTH Drilling with the Casing

Special seamless steel tube

Purpose: Soft stratum, broken soft rock layer, goose, difficult hole formation

Tunnel engineering, railway tunnel, highway tunnel, subway tunnel, High speed road tunnel.

Name Steel grade O.D I.D Tube boots wall thickness Steel mill length Thread
Overburden drilling system R780 108mm 99mm Supporting 4.5mm Baosteel 1500mm 4.5mmLeft screw type
Overburden drilling system R780 127mm 118mm Supporting 4.5mm Baosteel 1500mm 6mmLeft screw type
Overburden drilling system R780 146mm 136mm Supporting 5mm Baosteel 1500mm 6mmLeft screw type
Overburden drilling system R780 168mm 156mm Supporting 6mm Baosteel 1500mm 6mmLeft screw type


Pipe shed construction process: 

1: The arch arch arch steel installation in the guide tube 
2: Tie arch steel mesh 
3: Installation of arch bottom die 
4: Arch steel banding 
5: Arch template reinforcement and pump installation  
6: After the removal of the drilling pipe arch shed hole 
7: Hole of drill pipe roof 
8: The arch pipe roof construction digging machine to send
9: Pipe roof grouting 
10: The arch is completed 


The information about dth drill bit you may like to know before order:

1. Methods of Payment:
T/T (Telegraphic Transfer) or Western Union or L/C at sight

2. Handling time for an order
Based on order quantity, normally it takes 20 days for production.
in 3 working days after receiving the advance payment

3. Shipping way
Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air
Bulk order: we suggest by air or by sea.

4. Quality Control
We have our own experienced QC.
There will be strict inspection and testing for every order before shipping out.

5. After Services:
a. Our sales team will response for your question within 24 hours (Holidays Excluded)
b. Technical Support will be available in any time

6. Quality & Service:
A. There will be strict inspection and testing for every order before shipping out.
B. Our sales team and Technical Support will response for your question within 24 hours through skype: ROSCHEN.TOOL and WhatsApp/Wechat: +86-13764195009
C. Free replacement will provide once the failure confirmed caused or our product quality.