A tunneling machine and tunneling method suitable for soft rock geology
A technology for roadheaders and geology, which is applied in earth-moving drilling, underground chambers, shaft equipment, etc., can solve the problems of effective support of surrounding rock, large ceiling distance, easy occurrence of jamming and shielding, etc., to ensure stability. , the effect of preventing the overall decline
Active Publication Date: 2022-06-24
CHINA RAILWAY CONSTR HEAVY IND
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Problems solved by technology
[0003] In the prior art, 1. The open type TBM has a relatively large empty top distance (that is, the distance from the tunnel face to the support system along the excavation direction), and there is a long range of exposed surrounding rock from the tunnel face to the support system. , there is no timely and effective support for the surrounding rock, and there are hazards such as landslides; 2. The shield-type TBM uses shields to support the surrounding rock. When a TBM is excavating in a soft rock formation, it is difficult to ensure that the propulsion system is provided with a sufficient supporting reaction force by only relying on the support shoes of the support shield, resulting in the failure of the excavation
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[0054] A roadheader suitable for soft rock geology, comprising a cutter head 1, a front shield 2, a main drive 4, a propulsion system 5, a holding shield 7 and an auxiliary support system 8; the auxiliary support system 8 is slidably arranged on an external auxiliary device 10, like Figure 1-5 shown, as follows:
[0055] like figure 1 As shown, the cutter head 1, the front shield 2, the holding shield 7 and the external auxiliary equipment 10 are arranged in sequence along the driving direction.
[0056] The cutter head 1 is close to the face and is used for excavation; the main drive 4 is arranged in the front shield 2 and is used to drive the cutter head to work.
[0057] like figure 2 As shown, the upper end of the front shield 2 is provided with an installation part 2.1; the advanced support assembly 3 is arranged on the installation part for the support and stabilization of the surrounding rock; the advanced support assembly 3 includes a support 3.1 and an anchor 3....
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The invention discloses a tunneling machine suitable for soft rock geology, which includes a cutter head, a front shield, a main drive, a propulsion system, a tension shield and an auxiliary support system; the auxiliary support system includes a mounting part, a shoe assembly, a power part, a first The expansion part and the second expansion part; the power part can drive the support shoe assembly to tighten on the cave wall according to the working conditions, and provide support reaction force for the tension shield, and the tension shield cannot provide support reaction force and cannot When changing steps, the auxiliary support system can tighten the cave wall to provide support reaction force and push the tightening shield forward to complete the step change; at the same time, when the roadheader is excavating in an inclined shaft, the auxiliary support system can provide additional support to prevent the roadheader from overall decline. The invention also discloses a tunneling method, which includes using a tunneling machine suitable for soft rock geology to tunnel under three working conditions, through the tunneling methods under three different working conditions, it can adapt to various emergencies in the construction process , to facilitate the orderly construction.
Description
technical field [0001] The invention relates to the field of roadheaders, in particular to a roadheader and a roadhead method suitable for soft rock geology. Background technique [0002] During the construction of TBM (tunnel boring machine) in soft rock strata, the surrounding rock often encounters shrinkage, deformation or collapse. How to solve the problem of rapid TBM support is extremely important to improve the safety of TBM construction in soft rock strata. [0003] In the prior art, 1. The open-type TBM has a large ceiling distance (that is, the distance from the tunnel face to the support system along the tunneling direction), and a long range of surrounding rock is exposed from the tunnel face to the support system. , there is no timely and effective support for the surrounding rock, and there are hazards such as landslides; 2. The shield-type TBM uses a shield to support the surrounding rock. When the soft rock shrinks and deforms greatly, it is prone to jam and ...
Claims
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IPC IPC(8): E21D9/087E21D11/00E21F17/00
CPCE21D9/0873E21D11/00E21F17/00
Inventor 彭正阳龙斌李深远黄强苏翠侠欧阳涛刘龙
Owner CHINA RAILWAY CONSTR HEAVY IND