Construction method of passage of large-section tunnel by water diversion fault

Abstract

The invention discloses a construction method of passage of a large-section tunnel by water diversion fault. The construction method includes: firstly, exploring the fault to provide material basis for next tunnel design; secondly, laying out the tunnel design according to exploration conditions; thirdly, grouting and ponding before the tunnel passes the fault; and fourthly, supporting the surrounding rock when the tunnel passes the fault. The construction method is a complete technique integrating exploring, dredging, gushing prevention, and floor-ceiling reinforcement and allowing for passage of the large-section tunnel by the water diversion fault. Supporting measures are taken in response to different conditions, and safety of the tunnel in long-term use is guaranteed.

Description

technical field

[0001] The invention relates to roadway construction technology. Background technique

[0002] In the field of mining, large-section roadways refer to underground roadways with a section of more than 20 square meters. In some mining areas with complex hydrogeological conditions, large static water reserves, high water pressure, and well-developed faults, it is necessary to pass through such water-conducting faults when excavating roadways, and water inrush accidents are likely to occur if insufficient measures are taken. At present, there is some water control experience in this type of ordinary roadway excavation, but further research is needed for the development of roadways with large cross-sections that pass through faults, which poses a great safety threat to construction. Contents of the invention

[0003] The purpose of the invention is to propose a safe and effective construction method for the problem of safely crossing a water-conducting fault du...