Unlock instant, AI-driven research and patent intelligence for your innovation.

Construction method of advanced low-level controllable drainage through water-conducting faults

A construction method and fault technology, applied in drainage, earthwork drilling, mining equipment, etc., can solve problems such as high grouting cost, inability to achieve effective safety, and danger

Active Publication Date: 2020-09-08
CHANGSHA DESIGN & RES INST OF CHEM IND MIN
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN104532864B discloses the advanced radial precipitation channel system and method: "In the construction of the tunnel through the fault, the horizontal precipitation channel is constructed in advance in the excavation surface of the tunnel and the drainage borehole is constructed in the channel, and the bottom drainage borehole is drained by a vacuum pump. In this method, the risk of constructing a small-section horizontal precipitation channel in advance in the fracture zone is less than that of a large-section tunnel, but the small-section precipitation channel is also affected by the structure and water content of the fracture zone, and the construction and support are very difficult. , Dangerous, the gushing water in the channel entrains a large amount of sediment in the broken zone, causing the face to fall out of control. In addition, the rock in the broken zone is very broken and the air tightness is poor. Use a vacuum pump to suck the gushing water in the bottom borehole due to the entry of external air. If it fails, it cannot effectively reduce the water level in the excavation face and cannot achieve controllable drainage.
CN102808628B adopts the grouting process, which is the current mainstream construction process in the fractured zone of large faults. Specifically, it is the combination of pre-grouting on the face of the face and grouting behind the wall. High-pressure chemical grouting, the grouting process is complicated, difficult, and costly
[0003] To sum up, at present, most of the broken zones in the industry are grouting water blocking technology combined with advanced pipe shed and advanced drainage and other technical measures, but there are high cost of grouting, complicated process, and immature drainage technology cannot be realized Effective and safe low level and controllable drainage

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Construction method of advanced low-level controllable drainage through water-conducting faults
  • Construction method of advanced low-level controllable drainage through water-conducting faults
  • Construction method of advanced low-level controllable drainage through water-conducting faults

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In this example, the mine construction adit passes through a large fault in the area, and the adit goes uphill at 3‰. The fractured zone is mainly composed of fault gouge, a small amount of fault breccia, and the water inflow is relatively large. Due to the poor injectability and cementation of the fault gouges, a large amount of sediment gushed out from the roof and the working face under the entrainment of the gushing water, resulting in out-of-control, and the working face had to be closed and scrapped.

[0020] After analysis, the most unfavorable factor affecting the construction of this project is the underground water gushing. If the water gushing within the excavation surface can be effectively drained and water-isolated to ensure that the excavation surface is not affected by groundwater, the fault can be used with conventional technology and advanced pipe sheds. Tunneling through.

[0021] In this embodiment, the above-mentioned discarded tunnel surface is ret...

Embodiment 2

[0024] In this embodiment, the inclined shaft of the mine construction passes through a large fault in the area, and 10% of the inclined shaft goes downhill. In the broken zone, there are mainly fault breccias, a small amount of fault gouge, and a large amount of water inflow.

[0025] After analysis, the surface stream on the right side of the fault is the supply water source for the fault, and there is no supply water source on the left side. The width k of the water barrier column is 18m, and only the downhill section and the drainage chamber are constructed on the right side. Due to the downhill construction of the inclined shaft, if the drainage hole is to be lower than the excavation level of the inclined shaft in the fault, the length of the downhill section and the engineering volume will be large, and the drainage head will be large. In order to reduce the engineering volume, this implementation adopts adjustment and breaking The slope of the inclined shaft in the belt...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an advanced low-level controlled water drainage construction method for water diversion fault passing. When underground engineering is tunneled to a place at a certain distancefrom a fault, the tunneling is stopped to reserve a water prevention and isolation stud; a downhill section and a water drainage chamber are arranged on two sides of the tunnel face in sequence; a hole is drilled on the rock wall, close to the fault side, of the water drainage chamber to mount a valve in a pouring manner; after the valve is solidified, the valve is opened, and drilling is constructed inwards the fault through a valve body, and finally a circle of water drainage holes are finally formed around an excavated face; a plurality of observation holes and valves are constructed in the tunnel face; when the water pressures and water amounts in the observation holes are reduced to be below a safety value, the tunnel face is re-tunneled under the protection of water drainage and isolation effect of the water drainage holes to pass through the water prevention and isolation stud, the fault and a water prevention and isolation stud on the other side; after alleys or tunnels in thefault and the water prevention and isolation studs on the two sides undergo full cross-section waterproof supporting, the valves at the orifices of the water drainage holes and waterproof closed doors are closed to realize fault water blocking. The method can realize effective controlled advanced low-level water drainage when the underground engineering passes through a water diversion fault, andensure safe, stable and economical fault construction.

Description

technical field [0001] The invention relates to a construction method for underground projects such as mines and tunnels passing through faults and other water-bearing and water-conducting structural belts, and in particular to a construction method for leading low-level controllable water release and crossing water-conducting faults. Background technique [0002] During the excavation construction of mine roadways and tunnels and other underground projects, water-conducting and water-bearing structural fracture zones such as faults are often encountered. At present, advanced grouting of the working face, combined advanced grouting of the ground and the working face, advanced pipe shed or advanced pipe shed are used in the industry Cooperate with grouting and other processes to cross the fault fracture zone. CN104532864B discloses the advanced radial precipitation channel system and method: "In the construction of the tunnel through the fault, the horizontal precipitation ch...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E21F16/02
Inventor 彭云高忠民李寿山郭虎强李波
Owner CHANGSHA DESIGN & RES INST OF CHEM IND MIN