Tunnel hard rock non-blasting excavation method
A non-blasting, hard rock technology, applied in the direction of tunnels, earthwork drilling, mining equipment, etc., can solve the problems that the construction efficiency is greatly affected, the number of drilling holes is large, and the construction efficiency is affected, achieving significant technical advantages and overcoming the blasting effect , High excavation efficiency
Inactive Publication Date: 2021-11-02
WUHAN UNIV
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Abstract
The invention provides a tunnel hard rock non-blasting excavation method. The tunnel hard rock non-blasting excavation method can realize efficient excavation of complete or relatively complete hard rock without adopting large excavation equipment such as a heading machine and the like , and is characterized by comprising the following steps of 1, drilling contour holes along a tunnel face contour line so as to determine a tunnel excavation range, and determining each drilling and grooving position according to the excavation range, then, forming and drilling a plurality of cavity expanding holes in the position close to the positions; 2, drilling a plurality of rows of guide holes between the contour holes and the cavity expanding holes; 3, drilling groove forming holes which are meshed and overlapped with each other at the determined drilling and grooving positions, and finally forming a groove cavity; 4, enabling the cavity expanding holes near the groove cavity to be subjected to impact crushing, and therefore expanding excavation is conducted on the groove cavity; 5, according to a certain excavation sequence, starting from the guide holes close to the expanded and excavated groove cavity, adopting a hydraulic breaking hammer for conducting impact breaking on the guide holes, so that excavation of the rock mass of a main body part is completed; and 6, conducting impact crushing on the contour holes.
Application Domain
Tunnels
Technology Topic
Drill holeEnvironmental geology +3
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Examples
- Experimental program(1)
Example Embodiment
PUM
Property | Measurement | Unit |
Depth | 1.0 ~ 5.0 | m |
Diameter | 2.0 ~ 76.0 | mm |
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