Introduction
Tunnel drilling rig is a heavy mechanical equipment used for tunnel excavation and geological exploration. Its core function is to drive the drill bit deep into the rock layer for crushing and coring through a combination of rotation and impact, thereby achieving the purpose of excavation and sampling. Tunnel drilling rigs are widely used in mines, transportation tunnels, underground infrastructure and other scenarios.
Features
High Torque Output Capability
Tunnel drilling rigs have high torque output, for example, the rated output torque of the ZLJ350 model is 350N.M, and the rated output torque of the ZLJ-750 model is as high as 750N.M. This high torque design can provide strong rotational force during drilling, improve drilling efficiency and penetration, and is especially suitable for strata containing hard rock blocks, fault zones or multi-layered rock and soil layers.
Multiple Drill Rod Size Options
Tunnel drilling rigs support a variety of drill rod sizes, for example, the ZLJ350 model supports Ø33.5/42 mm, and the ZLJ-750 model supports Ø42/50 mm drill rods. This design is flexible and can adapt to different engineering needs. For example, when conducting geological exploration, usually only small-diameter drill rods are needed, which can not only meet the drilling needs, but also reduce drilling resistance and improve drilling efficiency. In large-scale projects such as tunnel main road excavation, large apertures are usually required to ensure construction space, and even provide sufficient working channels for the installation of subsequent blasting or support equipment.
Deep Drilling Capability
Tunnel drilling rigs have deep drilling capabilities, among which the maximum drilling depth of the ZLJ350 model is 200 meters, while the ZLJ-750 model can reach 250 meters. This feature enables it to play an important role in deep exploration and tunnel excavation, especially suitable for scenes such as mines and traffic tunnels that need to go deep underground. In mines, deep drilling helps to find the exact location of mineral resources; in traffic tunnel construction, deep drilling can provide important geological information. By conducting deep drilling below the actual drilling depth of the tunnel, unstable factors such as possible faults, weak layers or groundwater can be identified in advance.
Strong Pull-out And Driving Force
Pull-out force refers to the force used by the drill to pull the drill rod out of the hole during drilling, while driving force refers to the force used to push the drill rod into the rock. The tunnel drilling rig has strong pull-out and driving forces, with the rated pull-out force of the ZLJ350 model being 12KN and the driving force being 9KN, while the rated pull-out force of the ZLJ-750 model is 50KN and the driving force is 30KN. Strong pull-out and driving forces ensure that the drill rod will not get stuck in hard or unstable formations, while also reducing the risk of equipment being damaged by geological pressure.
High-speed Vertical Axis Rotation
The tunnel drilling rig has a high-speed vertical axis rotation function, with the rotation speed range of the ZLJ350 model being 115/205/360 R/MIN, while the ZLJ-750 model is 123/219/385 R/MIN. High-speed rotation can significantly improve the cutting efficiency of the drill bit, quickly penetrate the formation, and greatly increase the drilling speed, making it suitable for high-intensity continuous operations.
Parameters
|
Model |
ZLJ350 |
ZLJ-750 |
|
|
Rated output torque(N.M) |
350 |
750 |
|
|
Drill pipe(MM) |
Ø33.5/42 |
Ø 42/50 |
|
|
Drilling depth(M) |
200/150 |
250/200 |
|
|
Drilling diameter(MM) |
Open hole |
Ø89 |
Ø108 |
|
End hole |
≥Ø50 |
≥Ø76 |
|
|
Vertical shaft diameter(MM) |
Ø44 |
Ø54 |
|
|
Vertical shaft rotation speed (R/MIN) |
115/205/360 |
123/219/385 |
|
|
Vertical shaft stroke (MM) |
400 |
400 |
|
|
Rated pulling force (KN) |
12(7MPA) |
50(10MPA) |
|
|
Rated driving force (KN) |
9(7MPA) |
30(10MPA) |
|
|
Drilling Angle range(°) |
0-360 |
0-360 |
|
|
Winch lifting capacity(KN) |
8.7/4.74/2.69 |
18/10/5.7 |
|
|
Oil pump rated pressure(MPA) |
16 |
20 |
|
|
Oil pump rated flow(L/MIN) |
16 |
20 |
|
|
Motor power(KW) |
7.5 |
11 |
|
Applications
Traffic Tunnel Construction
Tunnel drilling rigs can conduct geological exploration before tunnel excavation so that engineers can understand the structure, hardness and softness of underground rock formations, and whether there are faults or groundwater. This exploration can help develop safe and efficient construction plans and reduce unforeseen geological risks encountered during excavation. When the tunnel is officially excavated, the tunnel drilling rig can cooperate with blasting operations to complete efficient tunnel excavation tasks.
Water Conservancy Projects
Tunnel drilling rigs also play an important role in large-scale water conservancy projects, such as the construction of reservoirs, underground water pipelines and water diversion tunnels. Through the drilling operations of tunnel drilling rigs, drainage channels or underground water storage pipelines can be established deep in the stratum to prevent surface water and groundwater from infiltrating into the building structure. In addition, tunnel drilling rigs can also conduct hydrogeological exploration to help understand the distribution of groundwater, so as to develop safer water conservancy project construction plans.
Underground Infrastructure Construction
With the acceleration of urbanization, underground space is being used more and more, such as underground integrated pipe galleries, drainage tunnels, power tunnels, etc. Tunnel drilling rigs can efficiently excavate underground space and provide channels for the laying and maintenance of pipelines. In addition, when it is necessary to dig a subway or underground pedestrian walkway, the tunnel boring machine can also complete the relevant drilling and excavation work, greatly improving construction efficiency and reducing the impact on ground buildings and the environment.
Pictures
