Ground pre-grouting method for j-type horizontal wing branch holes
A branch hole and pre-grouting technology, used in underground chambers, earthwork drilling, wellbore lining, etc., can solve problems such as limited space and occupation of roadway construction period, improve safety and reliability, prevent frame pressure, and improve reinforcement effect of effect
Active Publication Date: 2016-09-07
HUAINAN MINING IND GRP +1
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the grouting section of the roadway working face is relatively small, occupying the construction period of the roadway, and the space is limited
However, the area of overlying wind-oxidized bedrock on the working face is relatively large, and pre-grouting on the working face of the roadway is not suitable for this geological condition.
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
[0032] For a certain mining area of a certain mine, the J-type horizontal wing branch hole ground pre-grouting method is adopted, see the attached Figure 1 ~ Figure 2 , which includes the following steps:
[0033] 1. First, according to the position and area b's of the wind-covered oxidized bedrock zone on the weak coal mining face to be reinforced, determine the position, quantity and distance between the main grouting holes of the J type; The distance L between the opening position of the grouting hole and the leveling point of the drilling hole is 240m, the number is 2, and the spacing a is 30m
[0034] 2. Drill J-shaped main grouting holes at 6 places on the surface. The J-shaped main grouting holes include a straight hole section of 200m, a deflection section of 240m and a horizontal section of 200m; image 3 As shown, the J-shaped main grouting hole includes the first main grouting hole 1 and the second main grouting hole 2, and the directional drilling technology is...
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 discloses a ground preliminary grouting method for J-shaped horizontal wing-shaped branch holes. The ground preliminary grouting method includes: step 1, determining positions and quantity of J-shaped main grouting holes and distances among the adjacent J-shaped main grouting holes according to positions and areas of wind oxidization base rock zones coating a soft coal mining working face to be reinforced; step 2, drilling the J-shaped main grouting holes which include straight hole sections, deflecting sections and horizontal sections; step 3, forming 2-4 wing-shaped branch holes around each J-shaped main grouting hole according to the length of every horizontal grouting section; step 4, subjecting the wing-shaped branch holes to grouting in an advanced grouting mode. The ground preliminary grouting method for the J-shaped horizontal wing-shaped branch holes has the advantages that pre-grouting reinforcing effect for stratums of the wind oxidization base rock zones coating the soft coal mining working face can be improved effectively, accidents like support pressing on the coal mining working face can be avoided, safety and reliability of coal mining work can be improved and the like.
Description
technical field [0001] The invention belongs to the field of mine construction and relates to a ground pre-grouting method for J-shaped horizontal wing branch holes. Background technique [0002] The grouting technology usually uses the grouting pump as the power source, and uses the pressure provided by the grouting pump to inject the prepared grout with filling and cementing properties into the water-bearing or weak loose rock (soil) through the grouting pipeline and grouting holes. ) layer, make the grout spread into the fissures, pores or cavities of the above-mentioned formations in the form of filling or infiltration, and seal the fissures, isolate waterways, consolidate loose rock (soil) bodies, and fill cavities after the grout solidifies Water blocking or reinforcement effect. The grouting technology in coal mine construction is classified according to the purpose of grouting, and can be divided into vertical shaft surface pre-grouting, vertical shaft working face ...
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): E21D11/10
Inventor 荣传新程桦唐永志姚直书蔡海兵宋海清王晓健郑腾龙
Owner HUAINAN MINING IND GRP