A tunnel excavation method
A technology for tunnel excavation and excavation equipment, which is applied in tunnels, earth-moving drilling, mining equipment, etc., can solve the problems of large impact on the surrounding environment, change of construction technology, low efficiency of rock boring machines, etc., to achieve efficient excavation and improve excavation efficiency. Effect
Inactive Publication Date: 2019-07-09
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology
But when encountering hard rock, such as the uniaxial compressive strength is greater than 80MPa, and the rock is relatively complete, the efficiency of the rock boring machine is low, and even the construction cannot be done.
If the traditional blasting excavation method is used, firstly, it will have a great impact on the surrounding environment, and secondly, the construction process needs to be changed, so the efficiency cannot be guaranteed
Method used
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Embodiment Construction
[0018] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0019] It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0020] In the embodiment of the present invention, excavation equipment is used in conjunction with loosening blasting for tunnel excavation. Excavation equipment is used to excavate where the excavation equipment can successfully excavate. Where the excavation target is too hard and the excavation ability of the excavation equipment is not enough to successfully excavate, first Loose blasting is carried out on the excavation target, and the degree of blasting damage is subject to being able to be excavated by excavat...
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The embodiment of the invention discloses a tunnel excavating method, and relates to the field of constructional engineering. Hard rock can be efficiently excavated under the condition that the surrounding environment is not affected. The tunnel excavating method which utilizes excavating equipment and loosening blasting to excavate jointly comprises the steps that a first blast hole is formed intarget rock, and single point blowing up is conducted by utilizing the first blast hole; the damage of single point blowing up to the target rock is determined, and a damage threshold value corresponding to the excavation capability of the excavating equipment is determined; a plurality of second blast holes are formed in the target rock to conduct blasting on the target rock, and the distances among the second blast holes are related to the damage threshold value; and excavation is conducted on the target rock which is subjected to blasting by utilizing the excavating equipment. The tunnel excavating method can be used for tunnel excavation.
Description
technical field [0001] The invention relates to the technical field of construction engineering, in particular to a tunnel excavation method. Background technique [0002] In the construction process of urban subways, pipe corridors or other underground space projects, in order to make the construction continuous and reduce the interference to the surrounding environment, mechanical excavation is usually used, especially the cantilever rock boring machine. But when encountering hard rock, such as the uniaxial compressive strength is greater than 80MPa, and the rock is relatively intact, the efficiency of the rock boring machine is low, and even the construction cannot be performed. If the traditional blasting excavation method is used, firstly, it will have a great impact on the surrounding environment, and secondly, the construction process needs to be changed, and the efficiency cannot be guaranteed. Contents of the invention [0003] In view of this, an embodiment of t...
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IPC IPC(8): E21D9/00
Inventor 李胜林梁书锋方真刚张会哥
Owner CHINA UNIV OF MINING & TECH (BEIJING)