CN109798131A - Help grouting strengthening method in a kind of three-soft seam large-mining-height working surface top - Google Patents
Help grouting strengthening method in a kind of three-soft seam large-mining-height working surface top Download PDFInfo
- Publication number
- CN109798131A CN109798131A CN201910056790.8A CN201910056790A CN109798131A CN 109798131 A CN109798131 A CN 109798131A CN 201910056790 A CN201910056790 A CN 201910056790A CN 109798131 A CN109798131 A CN 109798131A
- Authority
- CN
- China
- Prior art keywords
- hole
- coal wall
- support bracket
- top plate
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The present invention relates to coal mine field of reinforcement, grouting strengthening method is helped more particularly to a kind of three-soft seam large-mining-height working surface top, include the following steps: coal wall drill straight hole, coal wall straight hole slip casting, coal wall rat holing, coal wall inclined hole slip casting, roof strata drill straight hole, roof strata straight hole slip casting, roof strata rat holing, roof strata inclined hole slip casting, press stubble bored grouting etc., the present invention has the advantages that reinforcing top side using top plate and coal wall circulation pressure stubble grouting method, obtain good practical effect, when the tomography of Coal Face Passing Through exceptions area, after grouting strengthening method, side each section shape in top is integral, greatly strengthen its anti-pressure ability, top side is non-breakable, fall top, it can guarantee the progress of normal back production, guarantee the normal development of construction, working face top side passive situation can be reversed rapidly, make working face is safe and smooth to pass through tomography, for Coal Face Passing Through Fault is crushed region reinforcement roof timbering and has played important function.
Description
Technical field
The present invention relates to coal mine field of reinforcement, and in particular to helps grouting and reinforcing side in a kind of three-soft seam large-mining-height working surface top
Method.
Background technique
Three-soft seam large-mining-height working surface passing fault or roof periodic are come during pressing, due to the particularity of its structure, top is helped
Unbalance stress, when local pressure is larger, will lead to top side it is loosely organized, push up the not formed entirety of each section of side, resistance to compression
Ability is weaker, and top side is more easily broken, falls top, brings difficulty to normal back production, may result in casualties when serious, be unfavorable for
Construction is normally carried out.
Summary of the invention
The technical problem to be solved by the present invention is top side is easily broken in the prior art, falls the problem of pushing up.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of three-soft seam large-mining-height working surface
Top side grouting strengthening method, includes the following steps:
A, coal wall drill straight hole: first determine whether top side whether have borehole conditions, when having borehole conditions, this support bracket to
Coal wall drilling, drilling parameter are as follows: orifice distance top plate 1-1.5m, 10 ° -15 ° of the elevation angle, the terminal in hole is apart from coal wall 6-8m, hole
Axis horizontal plane projection perpendicular to coal wall, aperture selects according to actual needs, the corresponding support bracket in two neighboring hole it
Between be spaced 1-3 support bracket；
B, coal wall straight hole slip casting: after the completion of coal wall drilling, injecting reinforcement material into coal wall hole, until aperture pulp stops
Injection, and injection rate is up to 650L, carries out sealing of hole with hole packer after the completion of slip casting；
C, coal wall rat holing: when top, side does not have borehole conditions, take from top side it is intact to top help bad direction
Drilling, drilling parameter are as follows: orifice distance top plate 1-1.5m, 10 ° -15 ° of the elevation angle, the terminal in hole is apart from coal wall 4-6m, the axis in hole
Line is 20 ° -35 ° in the projection of horizontal plane and the angle of coal wall, and aperture selects according to actual needs, the corresponding branch in two neighboring hole
1-3 support bracket is spaced between retaining frame；
D, coal wall inclined hole slip casting: after the completion of coal wall drilling, injecting reinforcement material into coal wall hole, until aperture pulp stops
Injection, and injection rate is up to 1300L, carries out sealing of hole with hole packer after the completion of slip casting；
E, roof strata drill straight hole: first determining whether top side has borehole conditions, when having borehole conditions, in this supporting
Frame drills to coal wall, and drilling parameter is as follows: orifice distance top plate 1-1.5m, 34 ° -57 ° of the elevation angle, the terminal in hole are located above top plate
And apart from top plate 2-2.5m, the axis in hole horizontal plane projection perpendicular to coal wall, aperture selects according to actual needs, adjacent two
1-2 support bracket is spaced between the corresponding support bracket in a hole；
F, roof strata straight hole slip casting: after the completion of coal wall drilling, reinforcement material is injected into coal wall hole, until aperture pulp
Stop injection, and injection rate is up to 1300L, carries out sealing of hole with hole packer after the completion of slip casting；
G, roof strata rat holing: when top side do not have borehole conditions when, take from top side it is intact to top side it is bad
Direction drilling, drilling parameter are as follows: orifice distance top plate 1-1.5m, and for the terminal in hole apart from coal wall 4-6m, the terminal in hole is located at top
Above plate and apart from top plate 2-2.5m, the axis in hole is 20 ° -35 ° in the projection of horizontal plane and the angle of coal wall, and aperture is according to reality
Demand selection in border is spaced 1-2 support bracket between the corresponding support bracket in two neighboring hole；
H, roof strata inclined hole slip casting: after the completion of coal wall drilling, reinforcement material is injected into coal wall hole, until aperture pulp
Stop injection, and injection rate is up to 2100L, carries out sealing of hole with hole packer after the completion of slip casting；
I, press stubble bored grouting: with the progress of coal mining, coal wall can be gradually reduced relative to the spacing of the terminal in hole,
When spacing when the spacing between coal wall and straight hole terminal is 4-6m or between coal wall and inclined hole terminal is 2-4m, carry out
New round bored grouting, and when new round drilling, it is bored from the support bracket beside the corresponding support bracket in last round of hole to coal wall
Hole repeats the above steps.
Top side is reinforced using top plate and coal wall circulation pressure stubble grouting method, obtains good practical effect, Coal Face Passing Through exceptions area
When tomography, after grouting strengthening method, side each section shape in top is integral, greatly strengthens its anti-pressure ability, top side
It is non-breakable, fall top, can guarantee the progress of normal back production, guarantee construction normal development, working face top can be reversed rapidly
Passive situation is helped, keeps working face safe and smooth by tomography, is crushed region reinforcement roof timbering for Coal Face Passing Through Fault and plays
Important function.
Further, orifice distance top plate 1m in step A, 10 ° of the elevation angle, the terminal in hole apart from coal wall 6m, aperture 42mm,
1 support bracket is spaced between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1m in step C, 10 ° of the elevation angle, the terminal in hole is apart from coal wall 4m, the throwing of the axis in hole in horizontal plane
The angle of shadow and coal wall is 20 °, aperture 42mm, is spaced 2 support brackets between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1m in step E, 34 ° of the elevation angle, the terminal in hole are located above top plate and apart from top plate 2m, and aperture is
42mm is spaced 1 support bracket between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1m in step G, apart from coal wall 4m, the terminal in hole is located above top plate and apart from top the terminal in hole
Plate 2m, the axis in hole are 20 ° in the projection of horizontal plane and the angle of coal wall, aperture 42mm, the corresponding supporting in two neighboring hole
1 support bracket is spaced between frame；
Spacing in step I, when the spacing between coal wall and straight hole terminal is 4m or between coal wall and inclined hole terminal
When for 2m, carry out new round bored grouting, and when a new round drills, from the support bracket beside the corresponding support bracket in last round of hole to
Coal wall drills, and repeats the above steps.
Further, orifice distance top plate 1.2m in step A, 12 ° of the elevation angle, apart from coal wall 7m, aperture is the terminal in hole
42mm is spaced 2 support brackets between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1.2m in step C, 12 ° of the elevation angle, the terminal in hole is apart from coal wall 5m, and the axis in hole is in horizontal plane
Projection and the angle of coal wall are 30 °, aperture 42mm, are spaced 1 support bracket between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1.2m in step E, 40 ° of the elevation angle, the terminal in hole are located above top plate and apart from top plate 2.3m, hole
Diameter is 42mm, is spaced 1 support bracket between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1.2m in step G, the terminal in hole is apart from coal wall 5m, and the terminal in hole is located above top plate and distance
Top plate 2.3m, the axis in hole are 30 ° in the projection of horizontal plane and the angle of coal wall, aperture 42mm, and two neighboring hole is corresponding
1 support bracket is spaced between support bracket；
Spacing in step I, when the spacing between coal wall and straight hole terminal is 5m or between coal wall and inclined hole terminal
When for 3m, carry out new round bored grouting, and when a new round drills, from the support bracket beside the corresponding support bracket in last round of hole to
Coal wall drills, and repeats the above steps.
Further, orifice distance top plate 1.5m in step A, 15 ° of the elevation angle, apart from coal wall 8m, aperture is the terminal in hole
42mm is spaced 3 support brackets between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1.5m in step C, 15 ° of the elevation angle, the terminal in hole is apart from coal wall 6m, and the axis in hole is in horizontal plane
Projection and the angle of coal wall are 35 °, aperture 42mm, are spaced 3 support brackets between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1.5m in step E, 57 ° of the elevation angle, the terminal in hole are located above top plate and apart from top plate 2.5m, hole
Diameter is 42mm, is spaced 2 support brackets between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1.5m in step G, the terminal in hole is apart from coal wall 6m, and the terminal in hole is located above top plate and distance
Top plate 2.5m, the axis in hole are 35 ° in the projection of horizontal plane and the angle of coal wall, aperture 42mm, and two neighboring hole is corresponding
2 support brackets are spaced between support bracket；
Spacing in step I, when the spacing between coal wall and straight hole terminal is 6m or between coal wall and inclined hole terminal
When for 4m, carry out new round bored grouting, and when a new round drills, from the support bracket beside the corresponding support bracket in last round of hole to
Coal wall drills, and repeats the above steps.
Further, hole sealing depth 2-3m.
Further, the hole packer uses FKST-38/6 type hole packer, this hole packer structure is simple, easy to operate, and
Sealing of hole effect is preferable.
Further, the reinforcement material is that long rice receives filler for mine material, and long rice receives filler for mine material can be quick
It reacts and hardens, meet water action-reaction and accelerate, and slightly foam, solidfied material intensity is high, there is good caking property with rock, and
With certain elasticity, product exquisiteness good fluidity, the crack that rock periphery can be permeated, thus good penetrability, reaction time it is short,
The resin of generation is durable, intensity is high.
The beneficial effects of the present invention are:
1. reinforcing top side using top plate and coal wall circulation pressure stubble grouting method, good practical effect is obtained, Coal Face Passing Through is abnormal
When area's tomography, after grouting strengthening method, side each section shape in top is integral, greatly strengthens its anti-pressure ability, pushes up
Help it is non-breakable, fall top, can guarantee the progress of normal back production, guarantee construction normal development, working face can be reversed rapidly
Side passive situation in top keeps working face safe and smooth by tomography, is crushed region reinforcement roof timbering for Coal Face Passing Through Fault and plays
Important function；
2. using FKST-38/6 type hole packer, this hole packer structure is simple, easy to operate, and sealing of hole effect is preferable；
3. long rice is received filler for mine material and fast reaction and can be hardened, meets water action-reaction and accelerate, and slightly foam, Gu
Compound intensity is high, has good caking property with rock, and have certain elasticity, product exquisiteness good fluidity, can permeate rock
The crack on stone periphery, therefore good penetrability, reaction time are short, the resin that generates is durable, intensity is high.
Detailed description of the invention
Fig. 1 is the schematic diagram (main view direction) in coal wall drill straight hole in the embodiment of the present invention one；
Fig. 2 is the schematic diagram (top view direction) of coal wall rat holing in the embodiment of the present invention one；
Fig. 3 is the schematic diagram (main view direction) in roof strata drill straight hole in the embodiment of the present invention one；
Fig. 4 is the schematic diagram (top view direction) of roof strata rat holing in the embodiment of the present invention one；
Wherein, the label in Fig. 2 and Fig. 4: 25# frame, 28# frame, 30# frame, 31# frame, 32# frame, 34# frame, 35# frame, 47#
Frame, 48# frame, 50# frame, 51# frame, 52# frame, 54# frame, 57# frame are respectively the code name of corresponding support bracket, 1#, 2#, 3#, 4#,
5#, 6#, 7#, 8# are respectively the code name of corresponding aperture.
Specific embodiment
The present invention is described in detail below in conjunction with attached drawing.
Embodiment one:
Grouting strengthening method is helped on a kind of three-soft seam large-mining-height working surface top, is included the following steps:
A, coal wall drill straight hole: first determine whether top side whether have borehole conditions, when having borehole conditions, this support bracket to
Coal wall drilling, as shown in Figure 1, drilling parameter is as follows: orifice distance top plate 1m, 10 ° of the elevation angle, the terminal in hole is apart from coal wall 6m, hole
Axis horizontal plane projection perpendicular to coal wall, aperture 42mm is spaced 1 branch between the corresponding support bracket in two neighboring hole
Retaining frame；
B, coal wall straight hole slip casting: after the completion of coal wall drilling, reinforcement material is injected into coal wall hole, reinforces material in the present embodiment
Material selects long rice to receive filler for mine material, be it is commercially available, until aperture pulp stops injection, and injection rate is up to 650L, slip casting
Sealing of hole, hole sealing depth 2m, using FKST-38/6 type hole packer, this hole packer are carried out with FKST-38/6 type hole packer after the completion
Structure is simple, easy to operate, and sealing of hole effect is preferable, and long rice, which receives filler for mine material, fast reaction and to harden, and meets water and makees
Accelerated with reaction, and slightly foamed, solidfied material intensity is high, has good caking property with rock, and have certain elasticity, produce
Product exquisiteness good fluidity, the crack that rock periphery can be permeated, therefore good penetrability, reaction time are short, the resin that generates is durable, strong
Degree is high；
C, coal wall rat holing: when top, side does not have borehole conditions, take from top side it is intact to top help bad direction
Drilling, as shown in Fig. 2, drilling parameter is as follows: orifice distance top plate 1m, 10 ° of the elevation angle, the terminal in hole is apart from coal wall 4m, the axis in hole
Line is 20 ° in the projection of horizontal plane and the angle of coal wall, aperture 42mm, is spaced 2 between the corresponding support bracket in two neighboring hole
A support bracket；
D, coal wall inclined hole slip casting: after the completion of coal wall drilling, long rice is injected into coal wall hole and receives filler for mine material, until hole
Mouth pulp stops injection, and injection rate is up to 1300L, carries out sealing of hole, sealing of hole with FKST-38/6 type hole packer after the completion of slip casting
Depth is 3m；
E, roof strata drill straight hole: first determining whether top side has borehole conditions, when having borehole conditions, in this supporting
Frame drills to coal wall, as shown in figure 3, drilling parameter is as follows: the terminal of orifice distance top plate 1m, 34 ° of the elevation angle, hole are located on top plate
Side and apart from top plate 2m, the axis in hole horizontal plane projection perpendicular to coal wall, aperture 42mm, the corresponding branch in two neighboring hole
1 support bracket is spaced between retaining frame；
F, roof strata straight hole slip casting: after the completion of coal wall drilling, long rice is injected into coal wall hole and receives filler for mine material, directly
Stop injecting to aperture pulp, and injection rate is up to 1300L, carries out sealing of hole with FKST-38/6 type hole packer after the completion of slip casting,
Hole sealing depth is 2m；
G, roof strata rat holing: when top side do not have borehole conditions when, take from top side it is intact to top side it is bad
Direction drilling, as shown in figure 4, drilling parameter is as follows: orifice distance top plate 1m, the terminal in hole is apart from coal wall 4m, the terminal position in hole
Above top plate and apart from top plate 2m, the axis in hole is 20 ° in the projection of horizontal plane and the angle of coal wall, aperture 42mm, phase
1 support bracket is spaced between the corresponding support bracket in two holes of neighbour；
H, roof strata inclined hole slip casting: after the completion of coal wall drilling, long rice is injected into coal wall hole and receives filler for mine material, directly
Stop injecting to aperture pulp, and injection rate is up to 2100L, carries out sealing of hole with FKST-38/6 type hole packer after the completion of slip casting,
Hole sealing depth is 3m；
I, press stubble bored grouting: with the progress of coal mining, coal wall can be gradually reduced relative to the spacing of the terminal in hole,
When spacing when the spacing between coal wall and straight hole terminal is 4m or between coal wall and inclined hole terminal is 2m, new one is carried out
Bored grouting is taken turns, and when new round drilling, is drilled from the support bracket beside the corresponding support bracket in last round of hole to coal wall, weight
Multiple above-mentioned steps.
Embodiment two:
The difference between this embodiment and the first embodiment lies in:
Orifice distance top plate 1.2m in step A, 12 ° of the elevation angle, the terminal in hole is apart from coal wall 7m, aperture 42mm, adjacent two
2 support brackets are spaced between the corresponding support bracket in a hole；
Hole sealing depth is 2.5m in step B；
Orifice distance top plate 1.2m in step C, 12 ° of the elevation angle, the terminal in hole is apart from coal wall 5m, and the axis in hole is in horizontal plane
Projection and the angle of coal wall are 30 °, aperture 42mm, are spaced 1 support bracket between the corresponding support bracket in two neighboring hole；
Hole sealing depth is 2.5m in step D；
Orifice distance top plate 1.2m in step E, 40 ° of the elevation angle, the terminal in hole are located above top plate and apart from top plate 2.3m, hole
Diameter is 42mm, is spaced 1 support bracket between the corresponding support bracket in two neighboring hole；
Hole sealing depth is 2.5m in step F；
Orifice distance top plate 1.2m in step G, the terminal in hole is apart from coal wall 5m, and the terminal in hole is located above top plate and distance
Top plate 2.3m, the axis in hole are 30 ° in the projection of horizontal plane and the angle of coal wall, aperture 42mm, and two neighboring hole is corresponding
1 support bracket is spaced between support bracket；
Hole sealing depth is 2.5m in step H；
Spacing in step I, when the spacing between coal wall and straight hole terminal is 5m or between coal wall and inclined hole terminal
When for 3m, carry out new round bored grouting, and when a new round drills, from the support bracket beside the corresponding support bracket in last round of hole to
Coal wall drills, and repeats the above steps.
Embodiment three:
The difference between this embodiment and the first embodiment lies in:
Orifice distance top plate 1.5m in step A, 15 ° of the elevation angle, the terminal in hole is apart from coal wall 8m, aperture 42mm, adjacent two
3 support brackets are spaced between the corresponding support bracket in a hole；
Hole sealing depth is 3m in step B；
Orifice distance top plate 1.5m in step C, 15 ° of the elevation angle, the terminal in hole is apart from coal wall 6m, and the axis in hole is in horizontal plane
Projection and the angle of coal wall are 35 °, aperture 42mm, are spaced 3 support brackets between the corresponding support bracket in two neighboring hole；
Hole sealing depth is 2m in step D；
Orifice distance top plate 1.5m in step E, 57 ° of the elevation angle, the terminal in hole are located above top plate and apart from top plate 2.5m, hole
Diameter is 42mm, is spaced 2 support brackets between the corresponding support bracket in two neighboring hole；
Hole sealing depth is 3m in step F；
Orifice distance top plate 1.5m in step G, the terminal in hole is apart from coal wall 6m, and the terminal in hole is located above top plate and distance
Top plate 2.5m, the axis in hole are 35 ° in the projection of horizontal plane and the angle of coal wall, aperture 42mm, and two neighboring hole is corresponding
2 support brackets are spaced between support bracket；
Hole sealing depth is 2m in step H；
Spacing in step I, when the spacing between coal wall and straight hole terminal is 6m or between coal wall and inclined hole terminal
When for 4m, carry out new round bored grouting, and when a new round drills, from the support bracket beside the corresponding support bracket in last round of hole to
Coal wall drills, and repeats the above steps.
Top side is reinforced using top plate and coal wall circulation pressure stubble grouting method, obtains good practical effect, Coal Face Passing Through exceptions area
When tomography, after grouting strengthening method, side each section shape in top is integral, greatly strengthens its anti-pressure ability, top side
It is non-breakable, fall top, can guarantee the progress of normal back production, guarantee construction normal development, working face top can be reversed rapidly
Passive situation is helped, keeps working face safe and smooth by tomography, is crushed region reinforcement roof timbering for Coal Face Passing Through Fault and plays
Important function.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (7)
1. grouting strengthening method is helped on a kind of three-soft seam large-mining-height working surface top, characterized by the following steps:
A, coal wall drill straight hole: first determining whether top side has borehole conditions, when having borehole conditions, in this support bracket to coal wall
Drilling, drilling parameter are as follows: orifice distance top plate 1-1.5m, 10 ° -15 ° of the elevation angle, the terminal in hole is apart from coal wall 6-8m, the axis in hole
Line horizontal plane projection perpendicular to coal wall, aperture selects according to actual needs, between the corresponding support bracket in two neighboring hole between
Every 1-3 support bracket；
B, coal wall straight hole slip casting: after the completion of coal wall drilling, injecting reinforcement material into coal wall hole, until aperture pulp stops note
Enter, and injection rate is up to 650L, carries out sealing of hole with hole packer after the completion of slip casting；
C, coal wall rat holing: when top, side does not have borehole conditions, take from top side it is intact from help bad direction to drill to top,
Drilling parameter is as follows: orifice distance top plate 1-1.5m, 10 ° -15 ° of the elevation angle, and the terminal in hole is apart from coal wall 4-6m, and the axis in hole is in water
The projection of plane and the angle of coal wall are 20 ° -35 °, and aperture selects according to actual needs, the corresponding support bracket in two neighboring hole it
Between be spaced 1-3 support bracket；
D, coal wall inclined hole slip casting: after the completion of coal wall drilling, injecting reinforcement material into coal wall hole, until aperture pulp stops note
Enter, and injection rate is up to 1300L, carries out sealing of hole with hole packer after the completion of slip casting；
E, roof strata drill straight hole: first determine whether top side whether have borehole conditions, when having borehole conditions, this support bracket to
Coal wall drilling, drilling parameter is as follows: orifice distance top plate 1-1.5m, 34 ° -57 ° of the elevation angle, the terminal in hole be located at top plate top and away from
From top plate 2-2.5m, the axis in hole horizontal plane projection perpendicular to coal wall, aperture selects according to actual needs, two neighboring hole
1-2 support bracket is spaced between corresponding support bracket；
F, roof strata straight hole slip casting: after the completion of coal wall drilling, injecting reinforcement material into coal wall hole, until aperture pulp stops
Injection, and injection rate is up to 1300L, carries out sealing of hole with hole packer after the completion of slip casting；
G, roof strata rat holing: when top, side does not have borehole conditions, take from top side it is intact to top help bad direction
Drilling, drilling parameter are as follows: orifice distance top plate 1-1.5m, apart from coal wall 4-6m, the terminal in hole is located on top plate the terminal in hole
Just and apart from top plate 2-2.5m, the axis in hole is 20 ° -35 ° in the projection of horizontal plane and the angle of coal wall, and aperture is according to practical need
It asks selection, is spaced 1-2 support bracket between the corresponding support bracket in two neighboring hole；
H, roof strata inclined hole slip casting: after the completion of coal wall drilling, injecting reinforcement material into coal wall hole, until aperture pulp stops
Injection, and injection rate is up to 2100L, carries out sealing of hole with hole packer after the completion of slip casting；
I, press stubble bored grouting: with the progress of coal mining, coal wall can be gradually reduced relative to the spacing of the terminal in hole, work as coal
When spacing when spacing between wall and straight hole terminal is 4-6m or between coal wall and inclined hole terminal is 2-4m, new one is carried out
Bored grouting is taken turns, and when new round drilling, is drilled from the support bracket beside the corresponding support bracket in last round of hole to coal wall, weight
Multiple above-mentioned steps.
2. grouting strengthening method is helped on a kind of three-soft seam large-mining-height working surface top according to claim 1, it is characterised in that:
Orifice distance top plate 1m in step A, 10 ° of the elevation angle, the terminal in hole is apart from coal wall 6m, aperture 42mm, two neighboring hole pair
1 support bracket is spaced between the support bracket answered；
Orifice distance top plate 1m in step C, 10 ° of the elevation angle, the terminal in hole apart from coal wall 4m, the axis in hole horizontal plane projection with
The angle of coal wall is 20 °, aperture 42mm, is spaced 2 support brackets between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1m in step E, 34 ° of the elevation angle, the terminal in hole are located above top plate and apart from top plate 2m, and aperture is
42mm is spaced 1 support bracket between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1m in step G, apart from coal wall 4m, the terminal in hole is located above top plate and apart from top plate the terminal in hole
2m, the axis in hole are 20 ° in the projection of horizontal plane and the angle of coal wall, aperture 42mm, the corresponding support bracket in two neighboring hole
Between be spaced 1 support bracket；
In step I, the spacing when the spacing between coal wall and straight hole terminal is 4m or between coal wall and inclined hole terminal is 2m
When, new round bored grouting is carried out, and when a new round drills, from the support bracket beside the corresponding support bracket in last round of hole to coal wall
It drills, repeats the above steps.
3. grouting strengthening method is helped on a kind of three-soft seam large-mining-height working surface top according to claim 1, it is characterised in that:
Orifice distance top plate 1.2m in step A, 12 ° of the elevation angle, the terminal in hole is apart from coal wall 7m, aperture 42mm, two neighboring hole
2 support brackets are spaced between corresponding support bracket；
Orifice distance top plate 1.2m in step C, 12 ° of the elevation angle, the terminal in hole is apart from coal wall 5m, the projection of the axis in hole in horizontal plane
Angle with coal wall is 30 °, aperture 42mm, is spaced 1 support bracket between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1.2m in step E, 40 ° of the elevation angle, the terminal in hole are located above top plate and apart from top plate 2.3m, and aperture is
42mm is spaced 1 support bracket between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1.2m in step G, apart from coal wall 5m, the terminal in hole is located above top plate and apart from top plate the terminal in hole
2.3m, the axis in hole are 30 ° in the projection of horizontal plane and the angle of coal wall, aperture 42mm, the corresponding supporting in two neighboring hole
1 support bracket is spaced between frame；
In step I, the spacing when the spacing between coal wall and straight hole terminal is 5m or between coal wall and inclined hole terminal is 3m
When, new round bored grouting is carried out, and when a new round drills, from the support bracket beside the corresponding support bracket in last round of hole to coal wall
It drills, repeats the above steps.
4. grouting strengthening method is helped on a kind of three-soft seam large-mining-height working surface top according to claim 1, it is characterised in that:
Orifice distance top plate 1.5m in step A, 15 ° of the elevation angle, the terminal in hole is apart from coal wall 8m, aperture 42mm, two neighboring hole
3 support brackets are spaced between corresponding support bracket；
Orifice distance top plate 1.5m in step C, 15 ° of the elevation angle, the terminal in hole is apart from coal wall 6m, the projection of the axis in hole in horizontal plane
Angle with coal wall is 35 °, aperture 42mm, is spaced 3 support brackets between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1.5m in step E, 57 ° of the elevation angle, the terminal in hole are located above top plate and apart from top plate 2.5m, and aperture is
42mm is spaced 2 support brackets between the corresponding support bracket in two neighboring hole；
Orifice distance top plate 1.5m in step G, apart from coal wall 6m, the terminal in hole is located above top plate and apart from top plate the terminal in hole
2.5m, the axis in hole are 35 ° in the projection of horizontal plane and the angle of coal wall, aperture 42mm, the corresponding supporting in two neighboring hole
2 support brackets are spaced between frame；
In step I, the spacing when the spacing between coal wall and straight hole terminal is 6m or between coal wall and inclined hole terminal is 4m
When, new round bored grouting is carried out, and when a new round drills, from the support bracket beside the corresponding support bracket in last round of hole to coal wall
It drills, repeats the above steps.
5. grouting strengthening method is helped on a kind of three-soft seam large-mining-height working surface top according to claim 1, it is characterised in that:
Hole sealing depth is 2-3m.
6. grouting strengthening method is helped on a kind of three-soft seam large-mining-height working surface top according to claim 1, it is characterised in that:
The hole packer uses FKST-38/6 type hole packer.
7. grouting strengthening method is helped on a kind of three-soft seam large-mining-height working surface top according to claim 1, it is characterised in that:
The reinforcement material is that long rice receives filler for mine material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910056790.8A CN109798131B (en) | 2019-01-22 | 2019-01-22 | Top slope grouting reinforcement method for large mining height working face of three-soft coal seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910056790.8A CN109798131B (en) | 2019-01-22 | 2019-01-22 | Top slope grouting reinforcement method for large mining height working face of three-soft coal seam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109798131A true CN109798131A (en) | 2019-05-24 |
| CN109798131B CN109798131B (en) | 2020-09-08 |
Family
ID=66559857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910056790.8A Active CN109798131B (en) | 2019-01-22 | 2019-01-22 | Top slope grouting reinforcement method for large mining height working face of three-soft coal seam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109798131B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179228A (en) * | 2020-09-29 | 2021-01-05 | 太原理工大学 | Deep hole subsection blasting joint cutting control top plate overall collapse method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280684A (en) * | 2008-05-12 | 2008-10-08 | 淮南矿业(集团)有限责任公司 | Goaf surrounding rock around gob-side supporting method under three soft geological condition |
| CN102425428A (en) * | 2011-09-12 | 2012-04-25 | 山东科技大学 | Method for controlling extreme broken roof in roadway head |
| CN105626100A (en) * | 2016-01-05 | 2016-06-01 | 程志恒 | Method for improving strength of coal and rock mass by carrying out grouting and drilling on coal walls of three soft coal seams |
| CN105927232A (en) * | 2016-05-19 | 2016-09-07 | 安徽理工大学 | Deep-blocking and shallow-grouting grouting method for no-blank area of mine and grouting safety protecting device |
| CN107905816A (en) * | 2017-11-08 | 2018-04-13 | 淮南矿业(集团)有限责任公司 | A kind of three-soft seam high-seam working face, which is faced upward, adopted more than 5m major fault methods |
| CN109026099A (en) * | 2018-07-05 | 2018-12-18 | 安徽理工大学 | A kind of soft-rock tunnel full length fastening supporting construction and its construction method |
-
2019
- 2019-01-22 CN CN201910056790.8A patent/CN109798131B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280684A (en) * | 2008-05-12 | 2008-10-08 | 淮南矿业(集团)有限责任公司 | Goaf surrounding rock around gob-side supporting method under three soft geological condition |
| CN102425428A (en) * | 2011-09-12 | 2012-04-25 | 山东科技大学 | Method for controlling extreme broken roof in roadway head |
| CN105626100A (en) * | 2016-01-05 | 2016-06-01 | 程志恒 | Method for improving strength of coal and rock mass by carrying out grouting and drilling on coal walls of three soft coal seams |
| CN105927232A (en) * | 2016-05-19 | 2016-09-07 | 安徽理工大学 | Deep-blocking and shallow-grouting grouting method for no-blank area of mine and grouting safety protecting device |
| CN107905816A (en) * | 2017-11-08 | 2018-04-13 | 淮南矿业(集团)有限责任公司 | A kind of three-soft seam high-seam working face, which is faced upward, adopted more than 5m major fault methods |
| CN109026099A (en) * | 2018-07-05 | 2018-12-18 | 安徽理工大学 | A kind of soft-rock tunnel full length fastening supporting construction and its construction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179228A (en) * | 2020-09-29 | 2021-01-05 | 太原理工大学 | Deep hole subsection blasting joint cutting control top plate overall collapse method |
| CN112179228B (en) * | 2020-09-29 | 2022-08-16 | 太原理工大学 | Deep hole subsection blasting joint cutting control top plate overall collapse method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109798131B (en) | 2020-09-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104790978B (en) | The tunnel ring-shaped base tunnel construction method of small interval crossings on different level | |
| CN102996149B (en) | Support method for bolt-grouting composite crushing dynamic-pressure roadway soft rock roof by high-pre-stressed anchor cable | |
| CN104453946B (en) | Advanced reinforcing construction method for building tunnel in soft surrounding rock | |
| CN111305876A (en) | Deep roadway anchoring-splitting grouting-hydraulic fracturing pressure relief cooperative control method | |
| CN108915720B (en) | A kind of large cross-section tunnel passes through fault belt construction method | |
| CN105134269B (en) | Control method for roadway surrounding rock achieving cooperative load bearing by enabling anchor cables to penetrate through sheds | |
| CN105545353B (en) | A kind of Man-made False construction method based on paste body filling | |
| CN208966352U (en) | A kind of supporting construction in weak rocks matter region tunnel | |
| CN205013013U (en) | Secretly dig station supporting construction suitable for last soft hard formation down | |
| CN108678772A (en) | A kind of multilevel hierarchy suspension device and its construction method for rich water sandy gravel stratum tunnel | |
| CN104005417A (en) | Construction method for high side slope of loosen and calaclastic rock | |
| CN102660955B (en) | Quick construction method for foundation pit slope support | |
| CN111594182A (en) | Large deformation control method for large buried depth soft rock tunnel | |
| CN112627832B (en) | Method for integrating detection, treatment and monitoring operation and maintenance of water inrush and mud inrush of karst tunnel | |
| CN104061000B (en) | Touch wall sinking passage formula tunnel partition wall and method of construction thereof | |
| CN112502720B (en) | Method for passing open TBM through fault fracture zone | |
| CN104389610A (en) | Construction method of ultrashort steps crossing operational expressway tunnel | |
| CN112832802B (en) | Large-bottom plate supporting structure and method for asymmetric pressure | |
| CN109707422A (en) | A kind of goaf roadway fender grouting method for protecting support | |
| CN109681269A (en) | Soft rocks are lauched-and husky mixing is prominent gushes Prevention Technique method | |
| CN110374677A (en) | Plateau rich water soft rock tunnel control drainage construction engineering method | |
| CN111594231A (en) | Grouting reinforcement method for deep surrounding rock broken water erosion roadway | |
| CN110284885A (en) | Shield inspection-pit construction method | |
| CN109779663A (en) | Gob side entry retaining multi-zone cascade-control method | |
| CN109798131A (en) | Help grouting strengthening method in a kind of three-soft seam large-mining-height working surface top |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |