CN118008417A - Automatic anchor rod installation method for repairing and anchoring surrounding rock of drilled hole - Google Patents
Automatic anchor rod installation method for repairing and anchoring surrounding rock of drilled hole Download PDFInfo
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- CN118008417A CN118008417A CN202410257718.2A CN202410257718A CN118008417A CN 118008417 A CN118008417 A CN 118008417A CN 202410257718 A CN202410257718 A CN 202410257718A CN 118008417 A CN118008417 A CN 118008417A
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- 239000011435 rock Substances 0.000 title claims abstract description 137
- 238000004873 anchoring Methods 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000009434 installation Methods 0.000 title claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 85
- 238000005553 drilling Methods 0.000 claims abstract description 71
- 230000007246 mechanism Effects 0.000 claims abstract description 63
- 239000000126 substance Substances 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 39
- 230000008093 supporting effect Effects 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 239000011159 matrix material Substances 0.000 claims abstract description 4
- 230000008439 repair process Effects 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000002562 thickening agent Substances 0.000 claims description 11
- 239000003054 catalyst Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 125000002081 peroxide group Chemical group 0.000 claims description 3
- 229920006337 unsaturated polyester resin Polymers 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- 230000032798 delamination Effects 0.000 claims 1
- 238000000926 separation method Methods 0.000 description 10
- 239000003245 coal Substances 0.000 description 9
- 239000010410 layer Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000002817 coal dust Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920006305 unsaturated polyester Polymers 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- 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
- E21D20/025—Grouting with organic components, e.g. resin
-
- 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
- E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole
Landscapes
- 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)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an automatic installation method of a drilling surrounding rock repairing and anchoring reinforcing anchor rod, which comprises the following steps of: drilling, wherein a driving mechanism of the anchor rod supporting device drives the anchor rod to rotate in a first direction for drilling, and the anchor rod cleans and deslaggs a drilling position in the drilling process; the first chemical grouting pump of the grouting mechanism is used for enabling the quick anchoring agent to enter the gap, the quick anchoring agent reaches the preset injection quantity, the first chemical grouting pump is closed, and the second chemical grouting pump is used for pushing the quick anchoring agent to reach the hole sealing position; pre-tightening, namely waiting for the rapid anchoring agent to be solidified for a preset time, and filling a gap between the drilling hole and the anchor rod with cleaning liquid; and (3) surrounding rock repairing, wherein surrounding rock repairing materials enter surrounding rock cracks of the drilled holes and react with a surrounding rock matrix. The automatic anchor rod installation method for repairing and anchoring the surrounding rock of the drilled hole has the advantages of improving the strength of the surrounding rock of the drilled hole and improving the supporting effect of the anchor rod through automatic operation.
Description
Technical Field
The invention relates to the technical field of anchor rod support in the mine field, in particular to an automatic anchor rod installation method for repairing and anchoring and reinforcing surrounding rock of a drilled hole.
Background
Anchor bolt supports have been developed over the years into a main body support form for coal mine roadways. The anchor bolt support is usually anchored by adopting a resin anchoring agent, and the installation of the anchoring agent needs manual assistance, so that the rapid automatic support of the anchor bolt is restricted. The grouting anchor rod support is also adopted for coal mines and other geotechnical engineering, and the grouting anchor rod support can be anchored in a pumping mode, but hole sealing is needed to prevent slurry from flowing out, the hole sealing process is complex, manual assistance is needed, and automation is difficult to realize.
The surrounding rock with complex conditions occupying most of China has the problems of hole collapse, surrounding rock crushing, crack development, coal dust in the drilled holes and the like, the resin anchoring agent has high failure rate in installation, grouting anchoring hole sealing operation is difficult, and the anchor rod has long time consumption and insufficient anchoring force in installation. In addition, part of the surrounding rock for drilling is softened when meeting water, the surrounding rock is broken, and the insufficient anchoring force is caused by the weakness of the surrounding rock serving as an anchoring agent bonding base. After the roadway surrounding rock is greatly deformed, large separation layers and cracks exist, and prestress of surrounding rock anchor rod supports with the separation layers and the cracks cannot be effectively diffused. In addition, dislocation exists in the rock stratum deformation process of the anchor rod support after the separation layer occurs, and the anchor rod is easily sheared. In the related art, the resin anchoring agent is packaged in a cartridge form, a plurality of cartridges are needed for realizing full-length anchoring, the drilled holes are filled after the cartridges are arranged in the drilled holes, the subsequent anchor rod cannot be inserted into the drilled holes, and full-length anchoring cannot be realized. The traditional grouting anchoring can realize full-length anchoring, but broken surrounding rock hole sealing is easy to fail, high-pressure grouting connection is tedious, manual auxiliary operation is needed, and construction efficiency is low.
Disclosure of Invention
The present invention has been made based on the findings and knowledge of the inventors regarding the following facts and problems: the surrounding rock is softened when meeting water, and the anchor force of the surrounding rock for drilling is insufficient.
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides an automatic installation method for the anchor rod with the hole surrounding rock repairing and anchoring enhancement, which has the advantages of improving the strength of the hole surrounding rock and improving the anchor rod supporting effect.
According to the embodiment of the invention, the automatic installation method of the anchor rod for repairing and anchoring the surrounding rock of the drilling hole comprises the following steps:
Drilling, wherein a driving mechanism of the anchor rod supporting device drives the anchor rod to rotate in a first direction for drilling, and the anchor rod cleans and deslaggs a drilling position in the drilling process; a first chemical grouting pump of a grouting mechanism of the anchor rod supporting device is used for enabling a quick anchoring agent to enter a gap between the anchor rod and the drilling hole through a pipeline and a grouting channel of the anchor rod, the quick anchoring agent after full mixing is injected to reach a preset injection amount and form high-viscosity paste, the first chemical grouting pump is closed by the grouting mechanism, and a second chemical grouting pump of the grouting mechanism is used for injecting cleaning liquid into the gap between the anchor rod and the drilling hole so as to push the quick anchoring agent in the gap to reach a hole sealing position; and pre-tightening, waiting for a preset time period, driving the anchor rod to rotate along a second direction after the quick anchoring agent is solidified so that the anchor rod partially wrapped by the quick anchoring agent applies pre-tightening force to surrounding rock, filling the gap between the drilling hole and the anchor rod with the cleaning liquid, injecting surrounding rock repairing material into the gap between the anchor rod and the drilling hole by a third chemical grouting pump of the grouting mechanism, and enabling the surrounding rock repairing material to enter surrounding rock cracks of the drilling hole under the action of pressure and react with a surrounding rock matrix.
The automatic installation method for the anchor rod for repairing and anchoring the surrounding rock of the drilled hole has the advantages of improving the strength of the surrounding rock of the drilled hole and improving the supporting effect of the anchor rod. The application has the following advantages: the problem of insufficient anchoring force caused by softening and crushing surrounding rocks when meeting water is solved by the surrounding rock repairing material, the bonding force of the coal rock mass of the roadway is improved by the cooperation of the quick anchoring agent and the surrounding rock repairing material, the strength of the coal rock mass of the roadway is improved, the prestress diffusion of the roadway reinforcing anchor rod is improved, the roadway supporting effect is improved, the automatic construction is realized, and the anchoring efficiency is high and the manual participation is less.
In some embodiments, after the anchor support device completes the drilling step, the anchor support device remains secured against the surrounding rock at the borehole for the anchoring and pre-tightening steps.
In some embodiments, the high viscosity paste formed by the rapid anchoring agent adheres to the borehole wall, the viscosity of the high viscosity paste being greater than the target viscosity such that the high viscosity paste does not flow within the borehole only under external pushing forces.
In some embodiments, the cleaning fluid and the surrounding rock repair material fill the surrounding rock fissures at the borehole at the pumping pressures of the second and third chemical grouting pumps.
In some embodiments, in the pre-tightening step, the driving mechanism or the pre-tightening wrench drives the anchor rod to rotate along the second direction, and the pre-tightening torque for rotating the anchor rod is greater than or equal to 300n·m.
In some embodiments, the fast anchoring agent has an anchoring length of 600-1200 mm and the bolt has a tensioning length of 800-1400 mm for applying the pre-tightening force.
In some embodiments, waiting for the preset time period is greater than or equal to the rapid anchoring agent set time period, which is 15-60 seconds.
In some embodiments, the fast anchoring agent is A, B a two-component anchoring agent, the a component comprises a curing agent, a thickener, an expansion agent, and an accelerator, the B component comprises an unsaturated polyester resin, the curing agent is a peroxide catalyst, the thickener is a nonmetallic thickener, and the expansion agent is an aluminum-containing expansion agent.
In some embodiments, the surrounding rock repair material includes a modified silicone to fill, bond and polymerize with-OH radicals of the borehole surrounding rock fissures to form a cured film to change the water softening properties of the surrounding rock, and a catalyst to accelerate the reaction.
In some embodiments, when the roadway has large cracks and separation layers, the anchoring agent is pumped and installed through the drill pipe, and the anchoring agent is injected into the surrounding rock repairing material after being solidified so as to perform grouting filling and bonding on the large cracks of the surrounding rock of the roadway.
In some embodiments, the anchor support device further comprises a controller, the propulsion mechanism, the driving mechanism, the first chemical grouting pump, the second chemical grouting pump, and the third chemical grouting pump of the anchor support device are all electrohydraulically controlled driven, and the controller is electrically connected with the propulsion mechanism, the driving mechanism, the first chemical grouting pump, the second chemical grouting pump, and the third chemical grouting pump to control the propulsion mechanism, the driving mechanism, the first chemical grouting pump, the second chemical grouting pump, and the third chemical grouting pump.
Drawings
Fig. 1 is a schematic structural view of an automatic installation method of a rock bolt with hole surrounding rock repairing and anchoring enhancement according to an embodiment of the invention.
Fig. 2 is a schematic diagram of grouting filling and bonding of large cracks in a roadway according to an automatic installation method of a drilling surrounding rock repairing and anchoring reinforced anchor rod in an embodiment of the invention.
Reference numerals: 1. a first chemical grouting pump; 2. a second chemical grouting pump; 3. a third chemical grouting pump; 4. a bolt; 5. a rapid anchoring agent; 6. surrounding rock repairing material.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The anchor bolt supporting device comprises an anchor bolt mechanism, a driving mechanism, a grouting mechanism and a propelling mechanism, wherein the anchor bolt mechanism comprises an anchor bolt 4, a grouting channel is arranged in the anchor bolt 4 along the length direction of the anchor bolt, the driving mechanism is connected with the anchor bolt mechanism and is used for driving the anchor bolt 4 to rotate so as to realize drilling and pretension, the grouting mechanism is connected with the grouting channel and is used for grouting the grouting channel, and the propelling mechanism is connected with the driving mechanism and is used for propelling the anchor bolt 4 to drill. After the anchor rod 4 finishes the drilling operation, the grouting mechanism performs grouting on the grouting channel, and finally flows into the drilling hole to realize anchoring. The driving end of the pushing mechanism is connected with the tail end of the anchor rod 4, and the pushing mechanism pushes the anchor rod 4 along the drilling direction while the anchor rod 4 rotates to drill, so that the anchor rod 4 drills, and the drilling depth is finished. The first end of stock 4 is equipped with the drill bit, and the drill bit is equipped with the play thick liquid hole with slip casting passageway intercommunication, and the second end of stock 4 is equipped with stopper, pretension nut, aligning ball pad and tray in proper order along the direction of the second end to the first end of stock 4, and the second end of stock 4 is equipped with the screw thread with pretension nut spiro union adaptation. The limiting block is provided with a grouting through hole communicated with the grouting channel, and a grouting port of the grouting pump is connected with the grouting channel. The driving mechanism acts on the pre-tightening nut, the pre-tightening nut drives the anchor rod 4 to rotate to realize drilling, the driving mechanism drives the pre-tightening nut to rotate, pressure is generated on the aligning ball pad, the aligning ball pad acts on the tray, the tray is matched with the surrounding rock wall to realize pre-tightening of the anchor rod 4, when the driving mechanism drives the pre-tightening nut to move along the direction back to the drilling direction of the anchor rod 4, the limiting block plays a limiting role on the pre-tightening nut to prevent the pre-tightening nut from separating from the anchor rod 4, and at the moment, the anchor rod 4 rotates together with the pre-tightening nut to realize drilling; when the driving mechanism drives the pre-tightening nut to move along the drilling direction, the pre-tightening nut rotates relative to the anchor rod 4, and pressure is generated on the spherical center pad and the tray, so that pre-tightening is realized. The output end of a driver of the driving mechanism is connected with the pre-tightening nut, the driver can be a motor, an air cylinder, a hydraulic cylinder or an internal combustion engine, and the driver is used for driving the pre-tightening nut to rotate forward or reversely. The propelling mechanism comprises a base and a propelling drill arm, the propelling drill arm is arranged on the base, the output end of the propelling drill arm is connected with the driving mechanism to propel the anchor rod 4 along the drilling direction, a guide rail arranged along the drilling direction is arranged on the base, and the driving mechanism is slidably arranged on the guide rail.
According to the automatic installation method of the anchor rod for repairing and anchoring the surrounding rock of the drilling hole, which is provided by the embodiment of the invention, the automatic installation method of the anchor rod for repairing and anchoring the surrounding rock of the drilling hole comprises the following steps:
Drilling, wherein a driving mechanism of the anchor rod supporting device drives the anchor rod 4 to rotate in a first direction for drilling, and the anchor rod 4 cleans and deslaggs a drilling position in the drilling process; the water injection enters the grouting channel of the anchor rod 4 to wash drill cuttings of the drilled hole, the drilled hole is cleaned and deslagged by means of the grouting channel of the anchor rod 4, the drill cuttings can be washed in the drilling process to obtain the drilled hole with less coal dust residue, the quality of the drilled hole is improved, and the anchoring agent is fully contacted with the drilled hole.
The first chemical grouting pump 1 of the grouting mechanism of the anchor rod supporting device is used for anchoring, the quick anchoring agent 5 enters a gap between the anchor rod 4 and a drilling hole through a pipeline and a grouting channel of the anchor rod 4, the fully mixed quick anchoring agent 5 is injected to reach a preset injection amount and form high-viscosity paste, the grouting mechanism is used for closing the first chemical grouting pump 1, and the second chemical grouting pump 2 of the grouting mechanism is used for injecting cleaning liquid into the gap between the anchor rod 4 and the drilling hole so as to push the quick anchoring agent 5 in the gap to reach a hole sealing position; the quick anchoring agent 5 can be a low-viscosity liquid when not in use, the viscosity range of the low-viscosity liquid can be 100 mPa.s-500 mPa.s, the quick anchoring agent 5 forms a high-viscosity paste after reaction, and the viscosity range of the high-viscosity paste can be 10000 mPa.s-20000 mPa.s. The cleaning solution also adopts high-viscosity cleaning solution which is a solution capable of dissolving the quick anchoring agent 5 and is used for cleaning the anchor rod 4.
Pre-tightening, waiting for a preset time period, and driving the anchor rod 4 to rotate along a second direction after the quick anchoring agent 5 is solidified so that the anchor rod 4 partially wrapped by the quick anchoring agent 5 applies pre-tightening force to surrounding rock, and filling a gap between a drilling hole and the anchor rod 4 with cleaning liquid;
And the third chemical grouting pump 3 of the grouting mechanism injects the surrounding rock repairing material 6 into a gap between the anchor rod 4 and the drilling hole, and the surrounding rock repairing material 6 enters surrounding rock cracks of the drilling hole under the action of pressure and reacts with a surrounding rock matrix. In the surrounding rock repairing step, the surrounding rock repairing material 6 enters large cracks and separation layers of the surrounding rock of the roadway, the repairing material fills the cracks and the separation layers, chemical repairing components in the repairing material react with surrounding rock organisms to form organisms which are not easy to hydrate, physical repairing components fill the cracks, crack weak surfaces, repair the surrounding rock of the roadway, form bearing frameworks in the surrounding rock of the drilled hole, and improve the strength of the surrounding rock of the drilled hole.
The automatic installation of the anchor rod for repairing and anchoring the surrounding rock of the drilled hole has the advantages of improving the strength of the surrounding rock of the drilled hole and improving the supporting effect of the anchor rod. The application has the following advantages: the problem of insufficient anchoring force caused by softening and crushing surrounding rock in water is solved through the surrounding rock repairing material, the bonding force of the roadway coal rock mass is improved through the cooperation of the rapid anchoring agent and the surrounding rock repairing material, the strength of the roadway coal rock mass is improved, and the roadway reinforcing anchor rod prestress diffusion is improved to improve the roadway supporting effect.
In some embodiments, after the anchor support device completes the drilling step, the anchor support device remains secured against the surrounding rock at the borehole for the pre-tightening step.
Specifically, the tray of the anchor bolt supporting device is kept to be attached to surrounding rock, so that recalibration alignment is not needed in equipment operation, the follow-up process is realized by only opening and closing a valve of an electrohydraulic control pump and rotating the motor, and the phenomena that after the traditional anchor bolt supporting is drilled, the anchor bolt 4 is detached to withdraw from a drill rod, the hole is required to be found, the hole is collapsed, coal dust exists in the drilled hole and the like are avoided, and the anchor bolt 4 cannot be automatically installed. Therefore, the tray of the anchor rod supporting device is kept in fit with surrounding rock at the drilling position, the drilling and pre-tightening steps are completed by the drilling machine, the anchor rod 4 and the drilling machine do not need to be switched and moved between the special grouting device and the pre-tightening device, the process steps are reduced, and automatic construction is facilitated.
In some embodiments, the high viscosity paste formed by the fast anchor 5 adheres to the borehole wall, the viscosity of the high viscosity paste being greater than the target viscosity such that the high viscosity paste does not flow within the borehole under only external pushing forces.
Specifically, the viscosity range of the high-viscosity paste can be 10000 mpa.s-20000 mpa.s, the viscosity of the high-viscosity paste should meet the requirement that when the extending direction of the drilling hole is vertical to the ground without external pushing force, i.e. the drilling hole is vertical, the high-viscosity paste formed by the anchoring agent and the cleaning solution does not sag in the drilling hole, and when the extending direction of the drilling hole is parallel to the ground, i.e. the high-viscosity paste in the horizontal drilling hole does not flow flat in the drilling hole, so that the anchoring agent is tightly filled in the gap between the anchor rod 4 and the drilling hole under the condition that no hole sealing device is arranged, the hole sealing device is omitted, complicated hole sealing steps are reduced, and the automation of the whole construction process is facilitated.
In some embodiments, the cleaning fluid and the surrounding rock repair material 6 fill the surrounding fissures at the borehole at the pumping pressures of the second chemical grouting pump 2 and the third chemical grouting pump 3.
Specifically, the anchoring agent flows into surrounding rock cracks under the drive of pumping pressure, can fill up the hollow uneven surface and cracks of the drilling holes in the flowing process, wraps the crushed coal rock blocks of the collapsed holes in the anchoring section, increases the friction force along the axial direction of the anchor rod 4, enhances the anchoring force of the anchor rod 4 and ensures the anchoring effect. The injection amount of the cleaning liquid is small, the injected cleaning liquid can dissolve the quick anchoring agent 5 attached to the anchor rod 4, the grouting channel of the anchor rod 4 is prevented from being blocked, and the cleaning liquid flows into cracks and separation layers of surrounding rock under the pumping pressure.
In some embodiments, in the pre-tightening step, the driving mechanism or the pre-tightening wrench drives the anchor rod 4 to rotate along the second direction, and the pre-tightening torque for rotating the anchor rod 4 is greater than or equal to 300n·m.
Specifically, in the pre-tightening step, the pre-tightening force on the anchor rod 4 can be applied by a driving mechanism to realize automatic construction operation, or can be applied by a manual auxiliary rotating pre-tightening wrench, and the pre-tightening torque is more than or equal to 300 N.m, so that the stratum can be compacted through the pre-tightening effect when the pre-tightening force is applied, and the bearing effect of the whole stratum is realized.
Specifically, in some embodiments, the quick anchor 5 has an anchor length of 600 to 1200mm and the bolt 4 has a tension length of 800 to 1400mm for applying the pre-tightening force.
Specifically, the anchoring length of the anchoring agent has influence on the curing time and injection amount of the anchoring agent, and changing the anchoring length can change the addition amount of the anchoring agent to adapt to the drilling condition and realize the change of the curing time of the quick anchoring agent 5. The quick anchoring agent 5 of the anchor rod 4 is solidified, after the full-length anchoring agent formed by integrating the quick anchoring agent 5and the surrounding rock repairing material 6 is solidified, the anchor rod 4 can be protected by the anchoring agent to form a protective layer outside the anchor rod 4, so that the anchor rod 4 is prevented from being sheared by rock stratum dislocation, the anchor rod 4 is stretched, the surrounding rock is stretched and pre-tightened, the whole bearing of the surrounding rock is realized, and the rock stratum is further prevented from generating a dislocation rod. The restoration range of the surrounding rock restoration material 6 to the surrounding rock of the drilling hole is more than or equal to 50mm around the drilling hole.
In some embodiments, waiting for the preset time period to be greater than or equal to the rapid anchoring agent 5 setting time period, the rapid anchoring agent 5 setting time period is 15-60 seconds.
Specifically, the pre-tightening force is applied under the fixation of the quick anchor 5 when the waiting time period is longer than the solidification time period of the quick anchor 5.
In some embodiments, the fast anchor 5 is a A, B two-component anchor, the a component comprises a curing agent, a thickener, an expander and an accelerator, the B component comprises an unsaturated polyester resin, the curing agent is a peroxide catalyst, the thickener is a nonmetallic thickener, and the expander is an aluminum-containing expander.
Specifically, the pre-tightening force is applied under the fixation of the quick anchoring agent 5 after the solidification time length of the quick anchoring agent 5 is longer than the preset time length, the anchoring agent adopts a double-component anchoring agent, A, B components are low-viscosity liquid before being mixed, A, B components react to form a high-viscosity paste after being mixed, unsaturated polyester of the component B can not flow downwards in a vertical downward drilling hole until thoroughly solidified, the unsaturated polyester of the component B is polymerized under the action of the curing agent of the component A and the accelerating agent, and the thickening agent increases the initial viscosity of a reaction product and forms the high-viscosity paste before being completely solidified. The expanding agent increases the final volume of the reaction product, which increases slightly. The reaction rate of the two anchoring agents varies depending on the amount of the curing agent added. The thickening agent can be fumed silica, the expanding agent can be any one or a mixture of more of aluminum oxide, calcium sulfoaluminate, aluminum sulfate mixture expanding agent and the like,
In some embodiments, the surrounding rock repair material 6 includes a modified silicone to fill, bond the borehole surrounding rock fissures and polymerize with-OH radicals on the borehole surrounding rock surface to form a cured film to change the water softening properties of the surrounding rock, and a catalyst to accelerate the reaction.
Specifically, the surrounding rock repair material 6 includes a modified silicone material and a catalyst. The surface of the surrounding rock softened by water is provided with-OH groups, when the surrounding rock is contacted with the injected surrounding rock repair material 6, the modified organosilicon material in the surrounding rock repair material 6 is subjected to chain separation to generate polymerization reaction with the-OH groups on the surface of the surrounding rock, and the reaction is accelerated under the action of a catalyst and competes with water to form a solidified film. The formed solidified material film has hydrophobicity and no reaction with water, even if the surrounding rock is subjected to a water supplementing channel, the surrounding rock cannot be continuously softened, so that the chemical repair of the surrounding rock is finished, the modified material can fill and bond cracks of the surrounding rock, improve the crack strength, and improve the integral strength of the surrounding rock, and the chemical repair and physical repair effects of the surrounding rock repair material 6 are combined, so that the anchoring strength is improved, and the problem of insufficient anchoring force of the surrounding rock when the surrounding rock is softened by water is solved.
In some embodiments, when the roadway has large cracks and separation layers, the anchoring agent is pumped and installed through the drill pipe, and the anchoring agent is injected into the surrounding rock repairing material 6 after being solidified so as to perform grouting filling and bonding on the large cracks of the surrounding rock of the roadway.
Specifically, the anchoring agent is injected and solidified through automatic pumping, a pipeline of a pipeline protection device of a cleaning device is injected into the device, as shown in fig. 2, a large crack or separation layer of the surrounding rock of the roadway is filled by the surrounding rock repairing material 6, physical and chemical repairing is carried out on the surrounding rock by the surrounding rock repairing material 6, the cohesive force of the coal rock mass of the roadway is improved by the surrounding rock repairing material 6, the integral strength of the coal rock mass of the roadway is improved, the prestress diffusion of the roadway reinforcing anchor rods 4 is realized, and the roadway supporting effect is improved.
In some embodiments, the anchor support device further comprises a controller, wherein the propulsion mechanism, the driving mechanism, the first chemical grouting pump 1, the second chemical grouting pump 2 and the third chemical grouting pump 3 of the anchor support device are all driven by electrohydraulic control, and the controller is electrically connected with the propulsion mechanism, the driving mechanism, the first chemical grouting pump 1, the second chemical grouting pump 2 and the third chemical grouting pump 3 to control the propulsion mechanism, the driving mechanism, the first chemical grouting pump 1, the second chemical grouting pump 2 and the third chemical grouting pump 3.
Specifically, the drill boom, the drill box, the driving mechanism and the two grouting pumps of the propelling mechanism are all electrohydraulic control driving energy to realize electrohydraulic control, so that the anchoring automation is convenient to carry out, and manual assistance is not needed. The controller can be a micro-program controller, and the controller controls each mechanism of the anchor rod supporting device to execute the anchor rod supporting steps respectively, so that the automatic control of each action in the method can be realized, the manual assistance is reduced, and the anchoring efficiency is improved.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those skilled in the art without departing from the scope of the invention.
Claims (11)
1. An automatic installation method of a drilling surrounding rock repairing and anchoring reinforced anchor rod is characterized by comprising the following steps of:
Drilling, wherein a driving mechanism of the anchor rod supporting device drives the anchor rod to rotate in a first direction for drilling, and the anchor rod cleans and deslaggs a drilling position in the drilling process;
A first chemical grouting pump of a grouting mechanism of the anchor rod supporting device is used for enabling a quick anchoring agent to enter a gap between the anchor rod and the drilling hole through a pipeline and a grouting channel of the anchor rod, the quick anchoring agent after full mixing is injected to reach a preset injection amount and form high-viscosity paste, the first chemical grouting pump is closed by the grouting mechanism, and a second chemical grouting pump of the grouting mechanism is used for injecting cleaning liquid into the gap between the anchor rod and the drilling hole so as to push the quick anchoring agent in the gap to reach a hole sealing position;
Pre-tightening, namely waiting for a preset time period, driving the anchor rod to rotate along a second direction after the quick anchoring agent is solidified so as to enable the anchor rod partially wrapped by the quick anchoring agent to apply pre-tightening force to surrounding rock, and filling a gap between the drilling hole and the anchor rod with the cleaning liquid;
And (3) surrounding rock repairing, namely injecting surrounding rock repairing materials into a gap between the anchor rod and the drilling hole by a third chemical grouting pump of the grouting mechanism, wherein the surrounding rock repairing materials enter surrounding rock cracks of the drilling hole under the action of pressure and react with a surrounding rock matrix.
2. The automated borehole wall rock repair and anchor enhanced rock bolt installation method of claim 1, wherein said anchor bolt support device remains secured to said borehole wall rock for said anchoring and pre-tensioning steps after said drilling step is completed.
3. The automated borehole wall rock repair and anchoring enhanced rock bolt installation method of claim 1, wherein said quick anchor forms a high viscosity paste attached to said borehole wall, said high viscosity paste having a viscosity greater than a target viscosity such that said high viscosity paste flows within said borehole only under external pushing forces.
4. The automated borehole wall repair and anchor enhanced rock bolt installation method of claim 1, wherein said cleaning fluid and said wall repair material fill a surrounding fracture at said borehole under the pumping pressures of said second chemical grouting pump and said third chemical grouting pump.
5. The automated installation method of a rock bolt for repairing and reinforcing a drilled surrounding rock according to claim 1, wherein in the pre-tightening step, the driving mechanism or the pre-tightening wrench drives the rock bolt to rotate along the second direction, and the pre-tightening torque for rotating the rock bolt is 300n·m or more.
6. The automated installation method of a rock bolt for repairing and reinforcing a drilled surrounding rock according to claim 1, wherein the anchoring length of the rapid anchoring agent is 600-1200 mm, and the tightening length of the bolt applying the pre-tightening force is 800-1400 mm.
7. The automatic installation method of the anchor rod for repairing and anchoring reinforced surrounding rock of the drilled hole according to claim 1, wherein the waiting time is longer than or equal to the solidification time of the rapid anchoring agent, and the solidification time of the rapid anchoring agent is 15-60 s.
8. The automated installation method of a rock bolt for repairing and reinforcing a borehole wall according to claim 1, wherein the quick anchoring agent is A, B two-component anchoring agent, the component a comprises a curing agent, a thickening agent, an expanding agent and an accelerator, the component B comprises unsaturated polyester resin, the curing agent is a peroxide catalyst, the thickening agent is a nonmetallic thickening agent, and the expanding agent is an aluminum-containing expanding agent.
9. The automated borehole wall repair and anchor-enhanced rock bolt installation method of claim 1, wherein the wall repair material comprises a modified silicone and a catalyst, the modified silicone is used for filling and bonding borehole wall cracks and carrying out polymerization reaction with-OH radicals on the surface of the borehole wall to form a cured film, the cured film is used for changing the water softening performance of the wall, and the catalyst is used for accelerating the reaction.
10. The automated installation method of a rock bolt for repairing and reinforcing a borehole wall according to claim 1, wherein when a large crack and a delamination exist in a roadway, an anchoring agent is pumped through a drill pipe, and the anchoring agent is injected into the wall rock repairing material after being solidified so as to perform grouting filling and bonding on the large crack of the roadway wall rock.
11. The automated borehole wall rock repair and anchoring enhancement bolt installation method according to claim 1, further comprising a controller, wherein the propulsion mechanism, the driving mechanism, the first chemical grouting pump, the second chemical grouting pump, and the third chemical grouting pump of the bolt support device are all electrohydraulically controlled driven, and wherein the controller is electrically connected to the propulsion mechanism, the driving mechanism, the first chemical grouting pump, the second chemical grouting pump, and the third chemical grouting pump to control the propulsion mechanism, the driving mechanism, the first chemical grouting pump, the second chemical grouting pump, and the third chemical grouting pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410257718.2A CN118008417A (en) | 2024-03-06 | 2024-03-06 | Automatic anchor rod installation method for repairing and anchoring surrounding rock of drilled hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410257718.2A CN118008417A (en) | 2024-03-06 | 2024-03-06 | Automatic anchor rod installation method for repairing and anchoring surrounding rock of drilled hole |
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| CN118008417A true CN118008417A (en) | 2024-05-10 |
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| CN202410257718.2A Pending CN118008417A (en) | 2024-03-06 | 2024-03-06 | Automatic anchor rod installation method for repairing and anchoring surrounding rock of drilled hole |
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| Country | Link |
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| CN (1) | CN118008417A (en) |
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- 2024-03-06 CN CN202410257718.2A patent/CN118008417A/en active Pending
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