Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Construction method of consolidating horizontal directional drilling hole by grouting coal seam baseboard

A coal seam floor and grouting reinforcement technology, which is applied in directional drilling, earthwork drilling, surveying, etc., can solve the problems of large amount of drilling construction, high construction cost, and low utilization rate of drilling holes, and shorten the time of excavation replacement. time, the effect of grouting reinforcement is enhanced, and the effect of advanced reinforcement is realized

Active Publication Date: 2011-07-27
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
View PDF6 Cites 40 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing coal seam floor reinforcement technology adopts ordinary rotary drilling, the inclination angle and azimuth angle of the opening are fixed, the holes are basically straight holes, and the drilling trajectory is uncontrollable, so the distance through the aquifer is short The grouting section is short, resulting in poor grouting effect, low utilization rate of the borehole, high construction cost, and when the borehole encounters an aquifer, the coordinates of the borehole trajectory cannot be calculated, and the location of the aquifer cannot be determined. location, which seriously affects the effect of drilling and grouting reinforcement
The patent application number is 200810050051.X, and the Chinese patent publication number is CN 101608552A: a method for strengthening the aquifer of the coal seam floor and protecting the water-resisting layer during the reinforcement process, using high-inclination drilling, and the included angle α is 20°-90°, At the same time, the pressure of the grouting final hole is controlled below 2 times of the hydraulic pressure of L8 limestone to minimize the damage to the aquifer. A good floor reinforcement effect requires intensive drilling, which results in a large amount of drilling work and high construction costs. At the same time, it increases the alternate time of mining in the coal mine working face, which seriously affects the production progress of the coal mine.

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 consolidating horizontal directional drilling hole by grouting coal seam baseboard
  • Construction method of consolidating horizontal directional drilling hole by grouting coal seam baseboard
  • Construction method of consolidating horizontal directional drilling hole by grouting coal seam baseboard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] After a detailed understanding of the geological data of the pre-reinforced stratum, the drilling design is carried out according to the water barrier, the depth of the aquifer and the consolidation range of the working face, and then the drilling construction is carried out. The construction steps and structure of the drilling are as follows: attached figure 1 , 2 As shown, the specific construction steps are as follows:

[0032] (1) Develop the drilling site 1 in the coal seam 2 roadway of the working face, and open a hole in the coal seam 2, and the opening direction points to the coal seam floor water-resisting layer 3 and the aquifer 4; after the drill hole is drilled to a certain depth below the coal seam floor Lift the drill, ream the hole, and install the first-level sealing casing to grout and seal the hole, and sweep the ho...

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 relates to a construction method of consolidating horizontal directional drilling holes by grouting a coal seam baseboard. Along with the continuous extension of coal mining depth and the continuous enlargement of the mining range, crustal stress is enlarged, and the number of abnormal geologic bodies is gradually increased, water pressure is gradually enhanced, hydrogeologic conditions become more and more complex, and water-inrush threat becomes more and more serious. The construction method provided by the invention comprises the following steps of: drilling holes in a coal seam by developing a drill field in a coal heading of a working surface, wherein the drilling direction points to a water resisting layer and a water bearing layer of the coal seam baseboard; rotatably drilling the coal seam baseboard for a certain depth to carry out hoist drilling and broaching, installing a primary hole sealing sleeve to seal the hole by grouting, cleaning the bottom of the hole after the grout is solidified; and then consolidating the hole by a primary sleeve, consolidating the hole by a secondary sleeve, and carrying out directional drilling to make the drilling hole extend along a preset consolidating layer according to the designed track to finally form the drilling hole. In the invention, the entire consolidation of the coal seam baseboard of the regional working surface is realized through designing the drilling hole track, determining the drilling hole consolidating radius and reasonably arranging the directional drilling according to the analysis to the water resisting layer and the water bearing layer.

Description

technical field [0001] The invention belongs to the field of mining, and in particular relates to a construction method for grouting and reinforcing horizontal directional drilling on a coal seam floor. Background technique [0002] With the continuous extension of coal mining depth and the continuous expansion of mining area, the ground stress increases, geological anomalies also gradually increase, water pressure gradually increases, hydrogeological conditions become more and more complex, and the threat of water inrush becomes more and more serious . If the water inrush is frequent and the amount of water inrush is large, it will seriously affect the safe production of coal mines. [0003] The water prevention and control technology of grouting in the coal seam floor aquifer is mainly to detect the water-proof and weak areas of the aquifer in the coal seam floor, to strengthen the floor aquifer by grouting, to block the water inrush channel of the floor, to strengthen th...

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
IPC IPC(8): E21B7/04E21B33/13E21B33/14E21B47/00
Inventor 董书宁李泉新石智军张壮路史海岐张宏钧
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products