CN113882884A - Grouting anchor rod device for reinforcing gob-side entry driving narrow coal pillar - Google Patents
Grouting anchor rod device for reinforcing gob-side entry driving narrow coal pillar Download PDFInfo
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- CN113882884A CN113882884A CN202111273725.4A CN202111273725A CN113882884A CN 113882884 A CN113882884 A CN 113882884A CN 202111273725 A CN202111273725 A CN 202111273725A CN 113882884 A CN113882884 A CN 113882884A
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- 239000003245 coal Substances 0.000 title claims abstract description 72
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 65
- 230000008093 supporting effect Effects 0.000 claims abstract description 16
- 238000007569 slipcasting Methods 0.000 claims description 15
- 230000002787 reinforcement Effects 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000008602 contraction Effects 0.000 abstract 1
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The application provides a grouting anchor rod device for reinforcing a gob-side entry driving narrow coal pillar, which comprises a plurality of side reinforcing plates, wherein the side reinforcing plates are distributed in an array manner in the circumferential direction of the coal pillar and are vertically attached to the outer side of the coal pillar; the grouting anchor rod assembly penetrates through the coal pillar and is arranged on the two opposite side reinforcing plates, the extension direction of the grouting anchor rod assembly is adjustable, the grouting anchor rod device for reinforcing the gob-side entry driving narrow coal pillar axially penetrates through the grouting anchor rod assembly on the opposite side reinforcing plates and is subjected to contraction adjustment, so that the side reinforcing plates can be tightly fit with the outer side of the narrow coal pillar, the supporting effect is enhanced, meanwhile, the extension direction of the grouting anchor rod assembly is adjustable, the extension direction of the anchor rod assembly can be conveniently adjusted according to the stress and deformation conditions of the coal pillar, and the problem of unbalance of the supporting stress of the coal pillar is solved.
Description
Technical Field
The invention belongs to the technical field of roadway support, and particularly relates to a grouting anchor rod device for reinforcing a gob-side entry driving narrow coal pillar.
Background
In coal mining, a roadway is generally arranged in a low-stress field at one side close to a coal pillar, so that the roadway is convenient to maintain, and the deformation is reduced, thereby forming the tunneling roadway which completely follows the edge of a goaf or only leaves a narrow coal pillar. In the structure, the coal pillars can replace an artificially constructed isolation wall, the cost of pumping concrete into the artificial wall and the material cost can be effectively reduced, and the transportation of materials such as concrete and the like is avoided. In the gob-side entry driving, the width of the coal pillar plays a role in determining the maintenance condition of the roadway, and a thin-skin coal pillar is required to be reserved as far as possible, namely a narrow coal pillar with the width of 2-5 m is used as a partition wall support body of the gob-side entry driving and the upper section gob-side area. Because the narrow coal pillar close to the mining side is shaped under the influence of the supporting force, the narrow coal pillar is easy to lose stability and has serious rib spalling, and an effective supporting structure needs to be installed.
However, the existing coal column supporting method mainly adopts section coal column coal wall side anchor rod supporting, only can temporarily reinforce the narrow coal column, and cannot solve the problem of stress imbalance of the narrow coal column supporting.
Therefore, it is necessary to provide a grouting anchor device for reinforcing a narrow coal pillar along a gob-side entry driving so as to solve the problems in the background art.
Disclosure of Invention
Aiming at part or all of the technical problems in the prior art, the invention provides a grouting anchor rod device for reinforcing a gob-side entry driving narrow coal pillar. This narrow coal column of gob entry driving consolidates slip casting stock device of usefulness carries out the axial through on the opposite side gusset plate through slip casting stock subassembly to carry out the shrink adjustment, thereby make the side gusset plate can closely agree with in the narrow coal column outside, strengthen the effect of strutting, simultaneously, because the extending direction of slip casting stock subassembly is adjustable, thereby can be according to the atress and the deformation condition of coal column, conveniently adjust the extending direction of stock subassembly, solve the coal column and strut the circumstances of stress unbalance.
According to the invention, the invention provides a grouting anchor rod device for reinforcing a gob-side entry driving narrow coal pillar, which comprises:
a plurality of side reinforcing plates which are arranged in an array in the circumferential direction of the coal pillar and are vertically attached to the outer side of the coal pillar,
the grouting anchor rod component penetrates through the coal pillar and is arranged on the two opposite side reinforcing plates,
wherein, slip casting stock subassembly's extending direction is adjustable.
In one embodiment, the grout bolt assembly comprises:
the anchor rod shaft sleeve is tubular, the outer end of the anchor rod shaft sleeve is communicated with an external grouting pump through a conveying pipe,
the thread guide sleeve is in thread engagement transmission type sleeved on the outer wall of the anchor rod shaft sleeve and is transversely arranged on the side reinforcing plate,
a fixed anchor rod, the relatively slidable butt joint of the fixed anchor rod extends into the anchor rod sleeve,
a sliding sleeve member which is sleeved outside the fixed anchor rod and can slide relatively, the sliding sleeve member is transversely arranged on the side reinforcing plate far away from one side of the threaded guide sleeve, and
and the adjusting frame assembly is arranged on the side reinforcing plate close to one side of the fixed anchor rod and is connected with the fixed anchor rod in a threaded engagement mode.
In one embodiment, a sliding support is vertically sleeved on the side reinforcing plate close to one side of the anchor rod shaft sleeve in a sliding mode, a first rotating shaft seat is embedded in the side end face of the sliding support, the first rotating shaft seat and the sliding support are connected around the first rotating shaft seat in an axial rolling mode, and the threaded guide sleeve is fixedly arranged on the first rotating shaft seat.
In one embodiment, a second rotating shaft seat is arranged on the side edge of the side reinforcing plate close to one side of the fixed anchor rod, a rotor is arranged between the second rotating shaft seat and the side reinforcing plate, and the sliding sleeve is fixedly arranged on the second rotating shaft seat.
In one embodiment, the adjuster bracket assembly includes:
an external expanding end seat which is connected with the fixed anchor rod through the thread engagement action,
the transmission screw rods are arranged at the two ends of the outer expanding end seat and can be relatively and rotatably arranged on the side reinforcing plate,
a connecting screw tube provided on each of the drive screws, the connecting screw tube being configured to slide in an axial direction with respect to the drive screws,
an inner threaded member threaded into the inner cavity of each of the connecting solenoids, the inner threaded member being hinged to the outer expanding end seat.
In one embodiment, the bolt sleeve comprises:
a pipe body having a first through-hole formed in a wall thereof,
connecting springs respectively arranged at two axial sides of the first through hole,
and the elastic expansion plate is arranged between the corresponding connecting springs.
In one embodiment, the fixing anchor comprises:
a tubular outer rod member having a second through hole provided on a wall thereof for corresponding to the first through hole,
the central guide rod can be relatively limited and slidably coaxially arranged in the outer rod piece, the outer end of the central guide rod extends out of the outer rod piece,
and the two inner supporting ribs are hinged with each other and correspond to the second through holes, one end of one inner supporting rib is hinged with the outer rod piece, and the other inner supporting rib is hinged with the central guide rod.
In one embodiment, a coupling sleeve is coaxially fixed at the insertion end of the tube body, the coupling sleeve is used for being in threaded connection with the fixing anchor, and the coupling sleeve is configured in a wedge-shaped structure.
In one embodiment, two opposite side reinforcing plates are in one group, and different groups of the side reinforcing plates are arranged to intersect so that the grouting bolt assemblies passing through different groups intersect.
In one embodiment, the bending device further comprises an upper jacking plate arranged corresponding to the side reinforcing plates and a lower jacking plate arranged corresponding to the side reinforcing plates, wherein the upper jacking plate and the lower jacking plate are both provided with a position bending plate.
Compared with the prior art, the invention has the advantages that: this narrow coal column of gob entry driving consolidates slip casting stock device of usefulness carries out the axial through on the opposite side gusset plate through slip casting stock subassembly to carry out the shrink adjustment, thereby make the side gusset plate can closely agree with in the narrow coal column outside, strengthen the effect of strutting, simultaneously, because the extending direction of slip casting stock subassembly is adjustable, thereby can be according to the atress and the deformation condition of coal column, conveniently adjust the extending direction of stock subassembly, solve the coal column and strut the circumstances of stress unbalance.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
fig. 1 is a structural schematic diagram of a grouting anchor rod device for reinforcing a gob-side entry driving narrow coal pillar according to one embodiment of the invention;
fig. 2 is a schematic structural view of a grouting bolt assembly according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a shoe according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of an adjuster bracket assembly of one embodiment of the present invention;
fig. 5 is a partial structural view of a bolt sleeve and a fixation bolt according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is clear that the described embodiments are only a part of the embodiments of the invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.
The embodiment of the invention provides a grouting anchor rod device for reinforcing a gob-side entry driving narrow coal pillar. As shown in fig. 1, the slip casting anchor apparatus includes a side gusset 1 and a slip casting anchor assembly 4. Wherein, the side gusset plate 1 is a plurality of and around the circumference array distribution of coal column. Each side reinforcing plate 1 is vertically arranged outside the gob-side entry driving narrow coal pillar in a fitting manner. The grouting bolt assembly 4 is used for penetrating through the coal pillar and is arranged on the two side reinforcing plates 1. According to the application, the grouting bolt assembly 4 is arranged on the corresponding group of side reinforcing plates 1 in a relatively deflectable penetrating manner. From this, slip casting stock subassembly 4 connects two relative side gusset plates 1 to make the axial distance between the relative side gusset plate 1 reduce, on the basis that side gusset plate 1 axial distance reduces, slip casting stock subassembly 4 still carries out the slip casting to the narrow coal pillar of gob entry driving, is used for improving and struts the effect. Particularly, when the roadway pressure distribution is not uniformly met and the gob-side entry driving narrow coal pillar is in deviation support, the grouting anchor rod assembly 4 can perform corresponding deflection adjustment and grouting reinforcement, the gob-side entry driving narrow coal pillar is generally in a local inclined state in the gob-side entry driving narrow coal pillar deviation support, and the general anchor rod is easy to generate structural damage to the interior of the gob-side entry driving narrow coal pillar during reinforcement.
In one embodiment, an upper header plate 2 is disposed above the side gusset plates 1. The upper jacking plates 2 are arranged in one-to-one correspondence with the side reinforcing plates 1 and are fixed above the side reinforcing plates 1. The cross section of the upper top plate 2 is in an L-shaped structure. A lower knock plate 3 is provided below the side reinforcing plates 1. The lower jacking plates 3 are arranged in one-to-one correspondence with the side reinforcing plates 1 and fixed below the side reinforcing plates 1. The cross section of the lower top plate 3 is in an L-shaped structure. The support brackets on the upper end surface and the lower end surface of the gob-side entry driving narrow coal pillar are assisted by the upper top plate 2 and the lower top plate 3 which are correspondingly arranged above and below the side reinforcing plate 1 and used for reinforcing support.
As shown in fig. 2, in the present embodiment, the grouting bolt assembly 4 includes a bolt sleeve 5, a threaded guide sleeve 401, a fixed bolt 6, a sliding sleeve 402 and an adjusting bracket assembly 7. The anchor sleeve 5 is designed as a hollow sleeve. One end (the right-hand member in fig. 2) of anchor rod shaft sleeve 5 is linked together through conveyer pipe and peripheral hardware grouting pump (not shown in the figure) for the peripheral hardware grouting pump can carry out the slip casting to the anchor rod according to the socket through anchor rod shaft sleeve 5 and consolidate, improves inside steadiness. The thread guide sleeve 401 is sleeved on the outer wall of the anchor rod shaft sleeve 5 in a thread meshing transmission mode, and the thread guide sleeve 401 is transversely arranged on the side reinforcing plate 1 and used for guiding the anchor rod shaft sleeve 5. The relatively slidable abutment of the anchor 6 projects into the anchor sleeve 5. The distance adjustment of the corresponding side reinforcing plates 1 is realized by adjusting the axial distance between the fixed anchor rod 6 and the anchor rod shaft sleeve 5, so that the reinforcement of the side wall periphery of the narrow coal pillar is realized. The sliding sleeve 402 is sleeved outside the fixed anchor rod 6 in a relatively sliding manner, and the sliding sleeve 402 is transversely arranged on the side reinforcing plate 1 far away from one side of the threaded guide sleeve 401 and is mainly used for guiding the fixed anchor rod 6. The adjusting bracket assembly 7 is provided on the side reinforcing plate 1 adjacent to one side of the fixing anchor 6 and is connected with the fixing anchor 6 by means of screw engagement. After the axial distance between the anchor 6 and the anchor sleeve 5 has been adjusted in place, the anchor 6 is connected to the lateral reinforcement plate 1 by means of the setting of the adjusting bracket assembly 7 for defining the axial position of the anchor 6.
Referring to fig. 3, as a preferred embodiment, a sliding support 403 is vertically slidably sleeved on the side reinforcing plate 1 close to the anchor shaft sleeve 5. A first rotating shaft seat 405 is embedded in the side end face of the sliding support 403. Rotating shaft seat one 405 and sliding support 403 are connected in a rolling mode around the axial direction of rotating shaft seat one 405, for example, a rotor 404 is arranged between rotating shaft seat one 405 and sliding support 403, and is used for reducing friction force of relative movement of the rotating shaft seat one 405 and the sliding support 403. Wherein, the threaded guide sleeve 401 is fixedly arranged on the first rotating shaft seat 405. Therefore, in the process of installing the anchor rod shaft sleeve 5, the anchor rod shaft sleeve 5 is inserted into the threaded guide sleeve 401, the sliding support 403 can vertically slide along the side reinforcing plate 1, so that the anchor rod shaft sleeve 5 can be aligned to a drilled hole to be inserted and arranged on a coal pillar, and the operation is convenient. In addition, during the installation of the anchor shaft sleeve 5, the threaded guide sleeve 401 rotates together with the first rotating shaft seat 405 relative to the sliding support 403, so that the insertion direction of the anchor shaft sleeve 5 is adjusted, and the anchor shaft sleeve is inserted into a drill hole formed in the coal pillar more smoothly.
Similarly, a second rotating shaft seat 405' is arranged on the side edge of the side reinforcing plate 1 close to the side where the anchor rod 6 is fixed. And a rotor 404 is arranged between the second rotating shaft seat 405' and the side reinforcing plate 1. The sliding sleeve 402 is fixedly disposed on the second rotating shaft seat 405'. The fixed anchor 6 can be inserted into the anchor shaft sleeve 5 smoothly when the position of the fixed anchor 6 is adjusted by the deflection action of the second rotary shaft seat 405'. Therefore, the rotation action of the second rotating shaft seat 405' and the first rotating shaft seat 405 is matched with the up-and-down sliding of the sliding support 403, so that the smooth butt joint of the anchor rod shaft sleeve 5 and the fixed anchor rod 6 is realized.
Referring to fig. 4, in the present embodiment, the adjusting bracket assembly 7 includes an outer expanding end seat 701, a driving screw 702, a connecting screw tube 703 and an inner screw 704. Wherein the outer expanding end seat 701 is configured in a general "[" shape structure and is itself generally symmetrical about the fixation bolt 6. The center of the outer expanding end seat 701 is connected with the fixing anchor 6 by a screw thread for defining the position of the fixing anchor 6 with respect to the side fixing plate 1. Two drive screws 702 are arranged at two ends of the outer expanding end seat 701 respectively. The drive screw 702 is rotatably mounted on the side gusset 1, and mainly serves to define and guide. A connecting coil 703 is provided on each drive screw 702. The connecting solenoid 703 is configured to slide axially relative to the drive screw 702 for adjusting the position of the adjuster bracket assembly 7 relative to the anchor 6 to meet installation fit requirements. An internal screw 704 is threaded into the lumen of each connecting coil 703. The inner screw 704 is hinged to the outer expanding end seat 701. After the axial insertion angle of the fixed anchor rod 6 is determined, the external expanding end seat 701 can be adjusted and transmitted by the threads of the transmission screw 702 and the rotation action of the internal screw 704, so that the external expanding end seat 701 and the sliding sleeve 402 on the second rotating shaft seat 405' can be ensured to be in a straight line, and the fixed anchor rod 6 can be smoothly inserted into the narrow coal pillar.
Referring to fig. 5, in the present embodiment, the anchor shaft sleeve 5 includes a tube body 501, a connection shaft sleeve 502, and an elastic expansion plate 504. The pipe fitting body 501 itself is tubular, and a first through hole 505 is provided in the wall thereof. Preferably, a plurality of first through holes 505 may be provided in the circumferential direction of the pipe fitting body 501 itself and referred to as one set, and a plurality of sets of first through holes 505 may be provided in the axial direction. The coupling bosses 502 are provided on both axial sides of each first through hole 505. The elastic expansion plates 504 are arranged on the two connecting shaft sleeves 502 of the same first through hole 505. In the initial state, the elastic expansion plate 504 is radially outwardly bulged at the axial center thereof. In the process of the anchor rod shaft sleeve 5 being put in, the elastic expansion plate 504 rebounds due to the pressure of the wall of the drilled hole, so that the anchor rod shaft sleeve 5 is smoothly put in, and after the anchor rod shaft sleeve is put in place, the elastic expansion plate 504 recovers the original position under the elastic force of the elastic expansion plate and abuts against the drilled hole to avoid the situation, and therefore the stability of the anchor rod shaft sleeve 5 in the drilled hole is improved.
The anchor 6 includes an outer bar 601, a center guide 602, and an inner support rib 603. The outer rod 601 is constructed in a hollow sleeve structure. The wall of the outer rod 601 is provided with a second through hole 604. The second through holes 60 correspond to the first through holes 505 in number and position one to one. The central guide rod 602 is disposed coaxially inside the outer rod 601 and can slide relatively to the outer rod 601, and one end of the central guide rod extends out of the outer rod 601. The inner support ribs 603 have two corresponding to the same second through hole 604 and are hinged to each other, one end of one inner support rib 603 is hinged to the outer rod 601, and the other inner support rib 603 is hinged to the center guide 602. The arrangement is that the hinged inner support rib 603 moves radially outwards or inwards due to the relative sliding action of the central guide rod 602 and the outer rod 601. When the inner support rib 603 moves radially outwards, the elastic expansion plate 504 can be abutted to contact with the elastic expansion plate, the elastic expansion plate 504 is expanded outwards, and then the anchor rod shaft sleeve 5 is grouted by an external grouting pump, so that the contact stability between the grouting anchor rod assembly and the narrow coal pillar is improved. In addition, the outwardly expanding resilient expansion plate 504 more stably abuts against the bore hole, further increasing stability. For example, the deflection angle of the inner support ribs 603 is in the range of 0 to 70.
The coupling boss 502 is coaxially fixed to the insertion end of the pipe body 501. The connecting sleeve 502 is intended to be screwed to the fixing anchor 6 to form a limit. And the coupling boss 502 is constructed in a wedge-shaped structure for facilitating smooth running of the pipe body 501.
Referring to fig. 1, a plurality of grouting bolt assemblies may be disposed on the same group of side fixing plates 1, and adjacent grouting bolt assemblies are disposed in opposite directions. That is, the anchor sleeve 5 of one grouted anchor assembly is located on the left side fixing plate 1, and the anchor sleeve 5 of the adjacent other grouted anchor assembly is located on the right side. In addition, two opposite side reinforcing plates 1 are in one group, and different groups of side reinforcing plates 1 are arranged to intersect so that grouting bolt assemblies passing through different groups intersect.
In summary, in the gob-side entry-driving narrow coal pillar reinforcement, a plurality of side reinforcing plates 1 are circumferentially attached and erected on the outer side of the gob-side entry-driving narrow coal pillar. At the moment, the upper top plate 2 and the lower top plate 3 can assist the support of the support brackets on the upper end face and the lower end face of the gob-side entry driving narrow coal pillar. And correspondingly and eccentrically adjusting the grouting anchor rod assembly according to the narrow coal pillar stress supporting structure, so that the grouting anchor rod assembly can perform stress compensation reinforcement on the grouting anchor rod assembly. The anchor rod shaft sleeve 5 can be sleeved outside the fixed anchor rod 6 in a sliding mode, the axial distance between the opposite side reinforcing plates 1 is adjusted, the center guide rod 602 is driven in a stretching mode, the inner supporting ribs 603 can abut against and contact the elastic expansion plates 504, the inner supporting ribs are expanded outwards, the anchor rod shaft sleeve 5 is filled with grouting through an external grouting pump, and accordingly contact stability between a grouting anchor rod assembly and a narrow coal pillar is improved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such changes and/or modifications as fall within the scope of the invention, and all such changes and/or modifications as are made to the embodiments of the present invention are intended to be covered by the scope of the invention.
Claims (10)
1. The utility model provides a slip casting stock device of narrow coal pillar reinforcement usefulness of gob entry driving which characterized in that includes:
a plurality of side reinforcing plates which are arranged in an array in the circumferential direction of the coal pillar and are vertically attached to the outer side of the coal pillar,
the grouting anchor rod component penetrates through the coal pillar and is arranged on the two opposite side reinforcing plates,
wherein, slip casting stock subassembly's extending direction is adjustable.
2. A grouting anchor device for gob-side entry driving narrow coal pillar reinforcement according to claim 1, wherein said grouting anchor assembly comprises:
the anchor rod shaft sleeve is tubular, the outer end of the anchor rod shaft sleeve is communicated with an external grouting pump through a conveying pipe,
the thread guide sleeve is in thread engagement transmission type sleeved on the outer wall of the anchor rod shaft sleeve and is transversely arranged on the side reinforcing plate,
a fixed anchor rod, the relatively slidable butt joint of the fixed anchor rod extends into the anchor rod sleeve,
a sliding sleeve member which is sleeved outside the fixed anchor rod and can slide relatively, the sliding sleeve member is transversely arranged on the side reinforcing plate far away from one side of the threaded guide sleeve, and
and the adjusting frame assembly is arranged on the side reinforcing plate close to one side of the fixed anchor rod and is connected with the fixed anchor rod in a threaded engagement mode.
3. The grouting anchor device for reinforcing the gob-side entry driving narrow coal pillar according to claim 2, wherein a sliding support is slidably sleeved on the side reinforcing plate close to one side of the anchor shaft sleeve, a first rotating shaft seat is embedded in a side end face of the sliding support, the first rotating shaft seat and the sliding support are connected around the first rotating shaft seat in an axial rolling manner, and the threaded guide sleeve is fixedly arranged on the first rotating shaft seat.
4. The grouting anchor device for reinforcing the gob-side entry driving narrow coal pillar according to claim 2 or 3, wherein a second rotary shaft seat is provided on the side of the side reinforcing plate near the side of the fixed anchor, and a rotor is provided between the second rotary shaft seat and the side reinforcing plate, wherein the sliding sleeve is fixedly provided on the second rotary shaft seat.
5. A grouting bolt device for reinforcing a gob-side entry-driving narrow coal pillar according to any one of claims 2 to 4, wherein the adjusting bracket assembly comprises:
an external expanding end seat which is connected with the fixed anchor rod through the thread engagement action,
the transmission screw rods are arranged at the two ends of the outer expanding end seat and can be relatively and rotatably arranged on the side reinforcing plate,
a connecting screw tube provided on each of the drive screws, the connecting screw tube being configured to slide in an axial direction with respect to the drive screws,
an inner threaded member threaded into the inner cavity of each of the connecting solenoids, the inner threaded member being hinged to the outer expanding end seat.
6. A grouting anchor device for gob-side entry driving narrow coal pillar reinforcement according to any one of claims 2 to 5, characterized in that the anchor bushing comprises:
a pipe body having a first through-hole formed in a wall thereof,
connecting springs respectively arranged at two axial sides of the first through hole,
and the elastic expansion plate is arranged between the corresponding connecting springs.
7. A grouting anchor device for gob-side entry driving narrow coal pillar reinforcement according to claim 6, wherein said fixing anchor comprises:
a tubular outer rod member having a second through hole provided on a wall thereof for corresponding to the first through hole,
the central guide rod can be relatively limited and slidably coaxially arranged in the outer rod piece, the outer end of the central guide rod extends out of the outer rod piece,
and the two inner supporting ribs are hinged with each other and correspond to the second through holes, one end of one inner supporting rib is hinged with the outer rod piece, and the other inner supporting rib is hinged with the central guide rod.
8. The apparatus of claim 7, wherein a coaxial type fixing sleeve is fixed to the insertion end of the tube body, the connecting sleeve is adapted to be screwed with the fixing anchor, and the connecting sleeve is configured in a wedge shape.
9. A grouting bolt device for gob-side entry narrow coal pillar reinforcement according to any one of claims 1 to 8, characterised in that two of the opposing side reinforcement plates are in one group, and the side reinforcement plates of different groups are arranged crosswise so that the grouting bolt assemblies passing through different groups intersect.
10. A grouting anchor device for reinforcing a gob-side entry driving narrow coal pillar according to any one of claims 1 to 9, further comprising an upper jacking plate provided correspondingly to the side reinforcing plate and a lower jacking plate provided correspondingly to the side reinforcing plate, wherein the upper jacking plate and the lower jacking plate are both configured with a position bending plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111273725.4A CN113882884B (en) | 2021-10-29 | 2021-10-29 | Grouting anchor rod device for reinforcing gob-side entry driving narrow coal pillar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111273725.4A CN113882884B (en) | 2021-10-29 | 2021-10-29 | Grouting anchor rod device for reinforcing gob-side entry driving narrow coal pillar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113882884A true CN113882884A (en) | 2022-01-04 |
| CN113882884B CN113882884B (en) | 2023-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111273725.4A Active CN113882884B (en) | 2021-10-29 | 2021-10-29 | Grouting anchor rod device for reinforcing gob-side entry driving narrow coal pillar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961814A (en) * | 2022-05-27 | 2022-08-30 | 安徽省皖北煤电集团有限责任公司 | Anchor bolt supporting device for coal mine underground roadway |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114961814B (en) * | 2022-05-27 | 2024-09-10 | 安徽省皖北煤电集团有限责任公司 | Anchor bolt supporting device for underground tunnel of coal mine |
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| CN113882884B (en) | 2023-08-08 |
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