Tunnel hard rock non-blasting excavation method

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.

Description

Technical field [0001] The present invention belongs to the field of tunnel excavation construction method, and specific methods for unobstructure of tunnel, comparative and complete hard rocks. [0002] technical background [0003] The excavation of tunnel rocks is usually taken by a drill explosion method. The drill explosion method, that is, through drilling, charging, blasting excavation of rock method, the vibration, noise, dust, dust, etc. produced by drill explosion, has a great impact on the environment. When the surrounding environment is complicated, if it is close to the residentally intensive district, there is a strict control requirement for blasting harmful effects. Therefore, the construction requirements cannot meet the construction requirements in the tunnel excavation of the area that requires strict control of the hazardous effects, and the non-burst excavation method is required. [0004] In the unmuttled excavation method of tunnels, milling method is the ex...

AI Technical Summary

Problems solved by technology

This method is the first time to use the method of drilling splitting to excavate the tunnel rock mass, but the number of drill holes required to manufacture the free surface is large, which affects the construction efficiency

[0006] The patent number is "CN 104314574 A" "a hard rock non-blasting excavation block method mechanical construction method". Drilling is used to divide the face into blocks, and finally the tunnel is excavated by hydraulic splitter. This method is complicated in procedure, and in the case of a large face, the number of drill holes required is very large, which affects the construction efficiency. Greater impact

Images