Construction Technology of Frozen Hole in Roadway
A construction technology and technology of freezing holes, which are applied in tunnels, mining equipment, earth-moving drilling, etc., can solve the problems of well wall damage, ground collapse, drilling rig equipment damage, etc., and achieve the effect of solving the secondary damage of the well wall
Active Publication Date: 2019-11-26
CHINA COAL FIRST CONSTR +1
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
During the construction process, since the upper part of the roadway is a continuous sand layer rich in water, water and sand outside the roadway may flow into the roadway when drilling penetrates the hollow section of the roadway, causing ground subsidence, damage to drilling rig equipment, and even casualties. Greater damage to the well wall due to water gushing and sand gushing
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0008] The present invention comprises the following steps: 1), first use the Φ245mm drill bit to drill the hole 1 downward from the ground, to 80-100mm inside the roadway roof 4; 2), pull out the drill bit, place 3, to the depth of the drill hole; 3), fill the cement slurry outside the steel pipe 3 and the annular space of the drill hole, and fix the steel pipe 3; 4), penetrate the core drill bit of Φ190mm into the steel pipe 3, break through the roadway roof 4, the core hole appears on the roadway roof 4, and then pull out the core bit; Leakage in the hole into the roadway 7 forms a conical material pile 6, and when the material pile 6 is close to the coring hole, stop filling the material; 6), then continue to fill with the compound of cement+water glass through the steel pipe 3 until it exceeds The roof 4 exceeds 10m, that is, the plugging process ends. During the plugging process, various additives are added to the cement slurry to make the density, viscosity, solidific...
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
Login to View More Abstract
The invention relates to a through roadway freezing hole construction process. The through roadway freezing hole construction process comprises the steps that (1) a drill bit is used for drilling a hole downwards from the ground into a top plate of a roadway at first; (2) the drill bit is pulled out, a steel pipe is placed down to the depth of the drill hole; (3) an annular space outside the steelpipe and in the drill hole is filled with cement grout to fix the steel pipe; (4) a coring drill bit is inserted into the steel pipe, the top plate of the roadway is drilled through, a coring hole isformed in the top plate of the roadway, and then the coring drill bit is pulled out; (5) stone, sand and cement are poured into the steel pipe firstly, and then the coring hole is blocked; and (6) consolidation grouting and filling of an inner hole of the steel pipe are carried out by using a compound of the cement plus water glass, and after the compound of the cement plus water glass is solidified, the normal construction and drilling of a freezing hole can be carried out.
Description
technical field [0001] The invention relates to a construction technology for freezing holes, in particular to a construction technology for freezing holes in tunnels. Background technique [0002] Curtain freezing can be used during the treatment of inclined shaft frozen shaft wall. Due to the long construction period of the shaft, segmental freezing can not only ensure the safety of the shaft construction, but also reduce the construction cost. In order to ensure that the upper and lower water in the wellbore does not collude with each other, the head hole freezing is required between each section. The head holes located in the roadway section between each section need to penetrate the well wall and go deep into the water-free bedrock. During the construction process, since the upper part of the roadway is a continuous sand layer rich in water, water and sand outside the roadway may flow into the roadway when drilling penetrates the hollow section of the roadway, causing ...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00
CPCE21D9/001
Inventor 李锐志郭永富任志刚张立刚
Owner CHINA COAL FIRST CONSTR