CN115977637A - Continuous pressure relief system and method for interior of surrounding rock of continuous large-deformation roadway - Google Patents
Continuous pressure relief system and method for interior of surrounding rock of continuous large-deformation roadway Download PDFInfo
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- CN115977637A CN115977637A CN202310182836.7A CN202310182836A CN115977637A CN 115977637 A CN115977637 A CN 115977637A CN 202310182836 A CN202310182836 A CN 202310182836A CN 115977637 A CN115977637 A CN 115977637A
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Abstract
The invention discloses a continuous pressure relief system and a method for the interior of surrounding rock of a continuous large-deformation roadway, which belong to the technical field of surrounding rock support, and the pressure relief system comprises: a power assembly; one end of the non-cutting-tooth screw rod is connected with the power assembly, and the other end of the non-cutting-tooth screw rod is in threaded connection with the cutting-tooth screw rod; one end of the drill bit is in threaded connection with the cutting pick screw rod; the cutting pick-free screw rod is arranged in the limiting support assembly; the pressure measuring ring bag is fixed in the middle of the cutting pick screw rod; the invention solves the problem that the method for manufacturing the large pressure relief hole by the traditional equipment is difficult to simultaneously manufacture the pressure relief hole for multiple times; one side of the pressure relief hole forms a curing area with high bearing capacity by spraying curing materials, the curing area and the fixing and protecting pipe form an anchoring whole, and the pipe blocking support plate forms a paired pulling area, so that the pressure relief hole can be effectively prevented from being damaged and developed to the anchoring area, the stability of surrounding rocks of the anchoring area is realized, and the method has very important popularization and application values.
Description
Technical Field
The invention relates to the technical field of surrounding rock supporting, in particular to a continuous pressure relief system and method for the interior of surrounding rock of a continuous large-deformation roadway.
Background
Along with the annual increase of the mining depth of coal resources, the maintenance difficulty of a roadway is steeply increased, the strength of coal bodies is relatively low, and the influence of strong mining is caused, the supporting methods of high-strength anchor cables and the like are difficult to control for the coal bodies on two sides of the roadway, especially the roadway can generate continuous large deformation under the high stress condition, the ventilation, the pedestrian and equipment operation and the like are seriously influenced, the surrounding rock must be subjected to repeated expanding and brushing repair, however, the repeated expanding and brushing and repairing cost is extremely high, and the construction of a high-yield high-efficiency mine and an intrinsically safe mine is seriously influenced.
The large holes formed in the surrounding rock of the roadway are used for pressure relief, so that the stability of the surrounding rock is effectively realized, and the concentrated stress of two sides of the roadway can be transferred to the deep part of the surrounding rock due to the hole forming holes in the surrounding rock, so that a good pressure relief effect is achieved. However, under difficult conditions such as deep strong mining, the inside pressure relief hole of country rock can be closed in the short time, therefore the pressure relief hole can show the pressure relief effect that reduces and shifts concentrated stress, and the tunnel still can continue big deformation, thereby is difficult to maintain, so must carry out and continue the release pressure side, generally adopt traditional making hole equipment secondary or even the method of making the pressure relief hole many times, but the defect is more: (1) The prior hole making equipment is large, and the transportation is extremely unchanged; (2) In an empty stoping roadway, the return air crossheading dust is extremely large in the stoping process of a working face, the danger of forming holes in equipment is high, the construction conditions of personnel and the like are extremely poor, and after the stoping roadway is greatly deformed, the hole forming equipment is not spatially arranged, so that construction cannot be carried out; (3) When the transportation belt occupies a large space in the transportation crossheading, the traditional hole-forming equipment is not placed in a space, the surrounding rock is greatly deformed, and other large-scale equipment is not arranged in the space, so that the pressure-relief holes are difficult to be formed for many times by adopting the traditional hole-forming equipment in a continuous large-deformation roadway; (4) The traditional hole forming equipment is slow in construction speed and difficult to keep up with the continuous large deformation speed of surrounding rocks, so that the surrounding rocks are greatly deformed before secondary hole forming, the traditional hole forming equipment is not placed in a space, and even the surrounding rocks are continuously contracted, so that the hole forming equipment cannot move; (5) The pressure relief holes are not supported, particularly one side of the pressure relief hole close to the roadway side is not supported, so that the plasticizing development of the pressure relief holes is disordered, the pressure relief holes are necessarily plasticized and developed to an anchoring area in the continuous deformation process, and the support effect of a support system is greatly reduced or even the support system is invalid; (6) The traditional equipment can induce coal body plasticization between the pressure relief cave and the roadway side by repeatedly building new pressure relief caves, so that the stability of surrounding rocks in an anchoring area is damaged, the surrounding rock environment is further deteriorated, and the roadway is more difficult to maintain.
In summary, for the surrounding rock of the continuous large deformation roadway, the control of the stability of the surrounding rock cannot be realized by building an internal pressure relief hole once, but the traditional hole forming method is difficult to meet the actual production requirement, and a new method needs to be provided to solve the problem of continuous pressure relief inside the surrounding rock of the continuous large deformation roadway and simultaneously prevent the pressure relief hole from being damaged and developed to an anchoring area.
Disclosure of Invention
The invention aims to provide a continuous pressure relief system and method for the interior of surrounding rock of a continuous large-deformation roadway, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a continuous release system in tunnel country rock is deformed greatly to last, includes:
a power assembly;
one end of the non-cutting-tooth screw rod is connected with the power assembly, and the other end of the non-cutting-tooth screw rod is in threaded connection with the cutting-tooth screw rod;
one end of the drill bit is in threaded connection with the cutting pick screw rod, a cutting pick is arranged on the side face of the other end of the drill bit, and the diameter of the rod body of the drill bit is the same as that of the cutting pick screw rod;
the cutting tooth-free screw rod is arranged in the limiting support assembly, and one end of the limiting support assembly, which is close to the power assembly, is connected with the coal caving assembly;
the pressure measuring ring bag is fixed in the middle of the cutting tooth screw rod and is connected with a pressure transmission pipe, the pressure transmission pipe is positioned in the cutting tooth screw rod and penetrates through the limiting support assembly to be connected with an external pressure gauge, and the pressure measuring ring bag, the pressure transmission pipe and the pressure gauge rotate simultaneously without relative movement;
and the stepped spray head is arranged in the middle of the smaller diameter expanding section and the large diameter expanding section of the limiting and supporting assembly through a centering ring.
As a further technical aspect of the present invention, the power module includes:
the motor fixing box is used for realizing leveling and fixing through two fixing pull rods and a length adjusting nut and is rotationally connected with the two fixing pull rods;
one end of the motor fixing cover is rotatably connected with the motor fixing box, and the other end of the motor fixing cover is fixedly connected with the motor fixing box through a fixing cover by using a bolt;
and the motor is fixedly arranged in the motor fixing box, and one end of the pick-free screw rod penetrates through a screw rod passage hole of the motor fixing box and is in threaded connection with the output end of the motor.
As a further technical scheme of the invention, the limit support assembly comprises:
protecting the pipe;
one end of the fixing and protecting pipe is in threaded connection with one end of the protecting pipe;
one end of the limiting pipe is in threaded connection with the other end of the protective pipe, and the pick-free spiral rod is positioned in the fixed protective pipe, the protective pipe and the limiting pipe;
the pipe blocking tray is arranged on the limiting pipe through a threaded connecting sleeve and used for preventing the curing area from moving to the pressure relief hole space.
As a further technical scheme of the present invention, one end of each of the fixed protection tube, the protection tube and the limiting tube is respectively provided with a first tube drawing pin hole, a second tube drawing pin hole and a third tube drawing pin hole, and in the pulling and recovering stage of the fixed protection tube, the protection tube and the limiting tube, tube drawing pins need to be respectively inserted into the first tube drawing pin hole, the second tube drawing pin hole and the third tube drawing pin hole.
As a further technical scheme of the invention, one end of the fixing and protecting pipe is a fixing end of the curing area, and concave-convex grooves are distributed on the fixing and protecting pipe, so that the fixing and protecting pipe is tightly combined with the curing material.
As a further technical scheme of the invention, the coal discharging assembly comprises:
the transfer cover is in threaded connection with one end of the limiting pipe, and a rod body at one end of the pick-free spiral rod movably penetrates through a spiral rod channel of the transfer cover;
the coal discharging cover is arranged at the output end of the transfer channel at the bottom end of the transfer cover;
and the conveying belt is arranged on the bottom side of the output end of the coal discharge cover.
As a further technical scheme of the invention, forward nozzles and inclined nozzles are distributed on the stepped nozzles, the straight radial direction of the nozzles is sequentially reduced in the direction of a pressure relief hole, the weight of the sprayed objects is sequentially reduced in the same time, the nozzles are connected into a whole, the middle positioning ring is connected with two sides for positioning through a constraint nut, and the stepped nozzles are positioned in the middle of a limiting support assembly, a smaller diameter expansion section and a large diameter expansion section by the middle positioning ring.
As a further technical scheme of the invention, the length of the drill bit is preferably 50 cm-150 cm.
The invention also aims to provide a continuous pressure relief method for the interior of the surrounding rock of the continuous large-deformation roadway, which adopts the continuous pressure relief system for the interior of the surrounding rock of the continuous large-deformation roadway and comprises the following steps:
s1, sequentially mounting a fixing protection pipe, a protection pipe and a limiting pipe on each pressure relief hole, enabling the fixing protection pipe to reach the edge of the pressure relief hole close to the roadway side and be cut off, adopting a step nozzle to rotationally spray a cured substance to form a curing area, integrally pushing the fixing protection pipe, the protection pipe and the limiting pipe to a designed position, additionally spraying the cured substance, enabling one end of the fixing protection pipe and the curing area formed by the cured substance to form an integral bearing body, and then withdrawing the step nozzle;
s2, a pipe blocking tray is installed at one end of the limiting pipe, so that the pipe blocking tray and the curing area form a counter-pulling anchoring whole through the fixing and protecting pipe, the limiting pipe and the curing area, the stability of coal bodies between the curing area and the roadway side part is realized, meanwhile, the coal bodies on one side of the curing area of the pressure relief hole cannot be continuously plasticized, and the long-term stability of the anchoring area can be realized;
s3, sequentially installing a drill bit, a cutting pick screw rod, a cutting pick-free screw rod, a transfer cover, a coal discharge cover, a motor fixing box and a motor;
s4, installing a pressure gauge, and filling liquid or gas into the pressure measuring ring bag through a liquid injection interface;
s5, the pressure of the pressure measuring ring bag is continuously increased, the volume of the pressure relief hole is gradually closed, the pressure relief effect is obviously weakened, the motor and the conveying belt are started at the moment, the coal body in the pressure relief hole is immediately transferred out, the effective space of the pressure relief hole is formed again, and rapid hole forming pressure relief is realized; all motors can be started in batches or at the same time, so that all pressure relief holes of the whole roadway are discharged in batches/at the same time, and the pressure is relieved by forming holes in batches/at the same time;
and S6, repeating the step S5 to realize continuous pressure relief inside the surrounding rock.
As a further technical scheme of the invention, for a stoping roadway, all devices need to be recovered before a working face is stoped to a pressure relief hole so as not to influence the stoping, or the devices need to be recovered when the requirements of dismantling the devices are met, and the recovery device comprises the following steps:
s10, sequentially removing a motor, a pressure gauge, a motor fixing box, a transfer cover, a coal discharge cover and a pipe blocking tray;
s20, mounting a switching nut on a group of anchor rods of the roadway, and mounting a pipe pulling pin and a switching pipe pin on a third pipe pulling pin hole of the limiting pipe;
s30, connecting a bidirectional telescopic hydraulic cylinder through a draw hook, then respectively connecting the bidirectional telescopic hydraulic cylinder to a switching nut and a switching pipe pin, and pulling out a limiting pipe through the bidirectional telescopic hydraulic cylinder;
and S40, repeating the step S30, and respectively pulling out the protective pipe and the fixed protective pipe.
As a further technical scheme of the invention, one end of the pressure relief hole is provided with two expanding sections, and the width of the smaller expanding section is a 1 The radius of the smaller expanding section is b larger than that of the pressure relief hole 1 The width of the large expanding section is a 2 The radius of the large expanding section is larger than that of the smaller expanding section by b 2 Said b is 1 Preferably 10cm to 20cm, b 2 Preferably 10cm to 50cm, a 1 Preferably 50cm to 20cm, a 2 The value is preferably 5 to 20cm.
The invention also aims to provide an application of the continuous pressure relief method in the surrounding rock of the continuous large-deformation roadway in coal roadways, soft rock roadways and broken surrounding rock roadways.
Compared with the prior art, the invention has the beneficial effects that: (1) The method radically and innovatively solves the problem that the method for manufacturing the large pressure relief holes by using the traditional equipment is difficult to simultaneously and repeatedly manufacture the pressure relief holes; (2) All the used equipment can be recycled, and the economic benefit is remarkable; (3) The equipment is convenient to install and use, the coal discharging and transporting speed is high, and the normal and efficient production is not influenced completely; (4) The pressure measuring ring bag is arranged on the cutting pick screw rod, the deformation of the pressure relief holes can be monitored on the periphery, and the pressure measuring ring bag is extruded, so that the coal discharging pressure relief is needed in early warning, and meanwhile, the pressure transmission pipe is arranged in the screw rod, so that the pressure transmission pipe is not influenced by the disordered deformation of the pressure relief holes and the rotation coal discharging of the screw rod; (5) One side of the pressure relief hole forms a high-bearing-capacity curing area by spraying curing materials, the curing area and the fixing and protecting pipe form an anchoring whole, and the pipe blocking support plate forms a paired pulling area, so that the pressure relief hole can be effectively prevented from being damaged and developed to the anchoring area, and the stability of surrounding rocks of the anchoring area is realized; (6) A plurality of pairs of closed/nearly closed pressure relief holes in the surrounding rock of even the whole roadway can discharge coal at the same time, and an effective pressure relief space is formed again; (7) the implementation space is not limited, and the applicability is strong; (8) has very extensive and important popularization and application value.
Drawings
Fig. 1 is a schematic perspective view and a schematic cross-sectional view of a protection tube according to an embodiment of the present invention.
Fig. 2 is a perspective view and a cross-sectional view of a protective tube according to an embodiment of the invention.
FIG. 3 is a block diagram of the limiting tube and the tube blocking tray according to the embodiment of the present invention.
FIG. 4 is a schematic view of a tube pulling pin according to an embodiment of the present invention.
FIG. 5 is a schematic view illustrating a connection process of the transfer cover and the coal discharge cover according to an embodiment of the present invention.
FIG. 6 is a schematic view of a motor fixing case according to an embodiment of the present invention.
FIG. 7 is a schematic view of a drill bit according to an embodiment of the present invention.
FIG. 8 is a schematic diagram of a cutting pick auger stem, a cutting pick auger stem with a pressure measuring ring pocket, and a cutting pick-free auger stem in an embodiment of the invention.
FIG. 9 is a schematic view showing the connection of the pressure measuring ring bag, the pressure transmitting tube and the pressure gauge in the embodiment of the present invention.
FIG. 10 is a schematic view of the connection process and the installation of the stepped nozzle, the centering ring and the constraining nut according to the embodiment of the present invention.
FIG. 11 is a schematic view of the fixing tube being installed on the edge of the pressure-regulating hole according to the embodiment of the present invention.
FIG. 12 is a schematic view of a stepped nozzle for spraying a cured object to form a cured area according to an embodiment of the present invention.
FIG. 13 is a schematic view showing the embodiment of the present invention after the curing pipe is attached to the enlarged diameter section and the curing agent is additionally sprayed.
Fig. 14 is a schematic view of fig. 13 after withdrawal of the step spray head.
FIG. 15 is a schematic diagram of an installation drill bit, a cutting pick screw rod, a non-cutting pick screw rod, a transfer cover, a coal discharge cover and a pressure gauge in an embodiment of the invention.
FIG. 16 is a schematic view of the motor fixing box and the motor after being installed according to the embodiment of the present invention.
Fig. 17 is a schematic view of a conveyor belt installed in an embodiment of the present invention.
FIG. 18 is a schematic view of the progressive closing of the pressure relief vent in an embodiment of the present invention.
FIG. 19 is a schematic view of a pressure relief cavity closed by large deformation to reform the effective pressure relief space in an embodiment of the present invention.
FIG. 20 is a schematic view of the recycling process of the apparatus in the embodiment of the present invention.
Fig. 21 is a schematic view showing the connection of the sheath, the adapter pin, the retractor and the stay pin of fig. 20.
Fig. 22 is a partially enlarged view of a portion a in fig. 20.
Notations for reference numerals: 1-fixed protective pipe, 1001-first pipe pulling pin hole, 1002-fixed end of a curing area, 2-protective pipe, 2001-second pipe pulling pin hole, 3-pipe pulling pin, 4-transfer cover, 4001-screw rod channel of transfer cover, 4002-transfer channel, 5-coal discharging cover, 6-motor fixing box, 6001-motor fixing cover, 6004-screw rod channel hole, 6002-fixing pull rod, 6003-length adjusting nut, 6005-screw bolt for fixing cover, 7-drill bit, 8-cutting tooth screw rod, 9-cutting tooth-free screw rod, 10-middle placing ring, 10001-constraint nut, 11-step nozzle, 11001-step nozzle delivery pipe, 11001-oblique nozzle, 11002-forward nozzle, 13-roadway, 14-pressure relief hole, 14001-smaller section, 14002-large section, 15-curing area, 16-anchor bolt, 17-motor, 18-expanded diameter pipe, 19-hydraulic cylinder, 20-bidirectional telescopic pin hole, 21-transfer pipe pin, 14022-transfer pipe, 14023-smaller section, 14001-expanded diameter pipe, 27025-third tension ring pressure gauge, 27025-pressure gauge, 19-expansion pipe, 19-pressure gauge, and pressure gauge.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Referring to fig. 1 to 22, a continuous pressure relief system for the interior of a surrounding rock of a continuous large deformation roadway according to an embodiment of the present invention includes:
a power assembly;
one end of the non-cutting-tooth screw rod 9 is connected with the power assembly, and the other end of the non-cutting-tooth screw rod 9 is in threaded connection with the cutting-tooth screw rod 8;
one end of a drill bit 7 is in threaded connection with a cutting pick spiral rod 8, a cutting pick is arranged on the side face of the other end of the drill bit 7, and the diameter of the rod body of the drill bit 7 is the same as that of the cutting pick spiral rod 8;
the cutting tooth-free screw rod is arranged in the limiting support assembly, and one end of the limiting support assembly, which is close to the power assembly, is connected with the coal caving assembly;
the pressure measuring ring bag 25 is fixed in the middle of the cutting pick screw rod 8, so that the pressure measuring ring bag 25 is not affected by deformation disturbance of the pressure relief hole, the pressure in the pressure relief hole can be measured from the deformation of the pressure relief hole to the closed stage faithfully, the pressure measuring ring bag 25 is connected with the pressure transmitting pipe 28, the pressure transmitting pipe 28 is positioned in the cutting pick screw rod 8 and is connected with an external pressure gauge 27 through a limiting support assembly, and the pressure measuring ring bag 25, the pressure transmitting pipe 28 and the pressure gauge 27 rotate simultaneously without relative movement;
the stepped spray head 11 is arranged in the middle of the limiting support assembly and the small diameter expansion sections 14001 and 14002 through the middle placing ring 10.
The power component drives the non-cutting-tooth screw rod 9, the cutting-tooth screw rod 8 and the drill bit 7 to rotate, so that punching is achieved, and coal produced by punching can be conveyed and output through the limiting support component and the coal discharging component in the punching process.
In an embodiment of the present invention, the power assembly includes:
the motor fixing box 6 is leveled and fixed through the two fixing pull rods 6002 and the length adjusting nut 6003, the motor fixing box 6 is rotatably connected with the two fixing pull rods 6002, and the fixing pull rods 6002 are fixed through anchor bolts 16;
a motor fixing cover 6001, one end of which is rotatably connected to the motor fixing box 6, and the other end of the motor fixing cover 6001 is fixedly connected to the motor fixing box 6 by a fixing cover bolt 6005;
and a motor 17 is installed in the motor fixing box 6, and one end of the pick-free screw rod 9 penetrates through a screw rod passage hole 6004 of the motor fixing box 6 to be in threaded connection with the output end of the motor 17.
The motor 17 drives the non-cutting-tooth screw rod 9, the cutting-tooth screw rod 8 and the drill bit 7 to rotate, and the motor 17 can be stably installed through the motor fixing box 6.
In an embodiment of the present invention, the limit support assembly includes:
a protective tube 2;
one end of the fixed protection tube 1 is in threaded connection with one end of the protection tube 2;
one end of the limiting pipe 23 is in threaded connection with the other end of the protective pipe 2, and the pick-free spiral rod 9 is positioned in the fixed protective pipe 1, the protective pipe 2 and the limiting pipe 23;
and the pipe blocking tray 24 is arranged on the limiting pipe 23 through a threaded connecting sleeve and is used for preventing the curing area 15 from moving to the pressure relief hole space.
In the embodiment of the present invention, a first pipe pulling pin hole 1001, a second pipe pulling pin hole 2001, and a third pipe pulling pin hole 23001 are respectively disposed at one end of the fixing and protecting pipe 1, the protecting pipe 2, and the limiting pipe 23, and in the pulling and recovering stage, the pipe pulling pins 3 need to be respectively inserted into the first pipe pulling pin hole 1001, the second pipe pulling pin hole 2001, and the third pipe pulling pin hole 23001.
In the embodiment of the invention, one end of the fixing and protecting tube 1 is a fixing end 1002 of the curing area, and concave and convex grooves are distributed on the fixing end to realize tight combination with the curing material.
In an embodiment of the invention, the coal discharging assembly comprises:
the transfer cover 4 is in threaded connection with one end of the limiting pipe 23, and a rod body at one end of the pick-free spiral rod 9 movably penetrates through a spiral rod channel 4001 of the transfer cover;
the coal discharging cover 5 is arranged at the output end of the transfer channel 4002 at the bottom end of the transfer cover 4;
and the conveying belt 18 is arranged at the bottom side of the output end of the coal caving cover 5.
Coal produced in the punching process sequentially passes through the fixed protective pipe 1, the protective pipe 2, the limiting pipe 23 and the transfer cover 4, then falls onto the conveying belt 18, and is conveyed out through the conveying belt 18.
In the embodiment of the invention, the step nozzle 11 is distributed with a forward nozzle 11002 and an inclined nozzle 11001, the direction of the nozzle is sequentially reduced along the direction of a pressure relief hole, the weight of the sprayed objects is sequentially reduced in the same time, the nozzles are connected into a whole, and one end of the step nozzle 11 is connected with a step nozzle delivery pipe 11001; the middle placing ring 10 is connected through a constraint nut 10001 and positioned on two sides, so that the stepped spray head 11 is positioned in the middle of a limiting support assembly, a smaller diameter expansion section 14001 and a large diameter expansion section 14002.
In the embodiment of the present invention, the length of the drill 7 is preferably 50cm to 150cm.
A continuous pressure relief method for the interior of surrounding rock of a continuous large-deformation roadway comprises the following steps:
s1, sequentially installing a fixed protection pipe 1, a protection pipe 2 and a limiting pipe 23 on each pressure relief hole, enabling the fixed protection pipe 1 to reach the edge of the pressure relief hole close to the side of a roadway 13 and stop, rotationally spraying a cured substance by adopting a stepped spray head 11 to form a curing area 15, integrally pushing the fixed protection pipe 1, the protection pipe 2 and the limiting pipe 23 to a designed position, spraying the cured substance, enabling one end of the fixed protection pipe 1 and the curing area 15 formed by the cured substance to form an integral bearing body, and then withdrawing the stepped spray head;
s2, installing a pipe resistance tray 24 at one end of the limiting pipe 23, so that the pipe resistance tray 24 forms a counter-pulling anchoring whole body with the curing area 15 through the fixing and protecting pipe 1, the protecting pipe 2, the limiting pipe 23 and the tunnel 13, the stability of coal bodies between the curing area 15 and the side part of the tunnel 13 is realized, meanwhile, the coal bodies on one side of the curing area of the pressure relief hole cannot be continuously plasticized, and the long-term stability of the anchoring area can be realized;
s3, sequentially installing a drill bit 7, a cutting tooth screw rod 8, a cutting tooth-free screw rod 9, a transfer cover 4, a coal discharge cover 5, a motor fixing box and a motor;
s4, installing a pressure gauge 27, and filling the pressure measuring ring bag 25 with liquid or gas through a liquid injection interface 27001;
s5, continuously increasing the pressure of the pressure measuring annular bag 25 to show that the volume of the pressure relief hole is gradually closed, obviously reducing the pressure relief effect, starting the motor 17 and the conveying belt 18 at the moment, immediately transferring out the coal in the pressure relief hole 14, reforming the effective space of the pressure relief hole, and realizing rapid cavitation pressure relief; all the motors 17 can be started in batches or at the same time, so that all the pressure relief holes 14 of the whole roadway 13 are discharged in batches/at the same time, and the pressure is relieved by forming holes in batches/at the same time;
and S6, repeating the step S5 to realize continuous pressure relief inside the surrounding rock.
In the embodiment of the invention, for the recovery roadway 13, all devices need to be recovered before the working face recovers to the pressure relief cave so as not to influence recovery, or the devices need to be removed, and the recovery device has the following steps:
s10, sequentially removing a motor 17, a pressure gauge 27, a motor fixing box 6, a transfer cover 4, a coal discharge cover 5 and a pipe blocking tray 24;
s20, then installing a switching nut 22 on an anchor rod 26 at one side of the roadway 13, and installing a pipe pulling pin 3 and a switching pipe pin 21 on a third pipe pulling pin hole 23001 of a limiting pipe 23;
s30, connecting the bidirectional telescopic hydraulic cylinder 20 through the draw hook 19, then respectively connecting the bidirectional telescopic hydraulic cylinder 20 to the adapter nut 22 and the adapter pipe pin 21, and pulling out the limiting pipe 23 through the bidirectional telescopic hydraulic cylinder 20;
and S40, repeating the step S30, and respectively pulling out the protective tube 2 and the fixed protective tube 1.
In the embodiment of the present invention, one end of the pressure relief hole 14 has two expanding sections, and the width of the smaller expanding section 14001 is a 1 The radius of the smaller expanding section 14001 is larger than the radius of the pressure relief hole by b 1 The width of the large diameter expansion section 14002 is a 2 Said large diameter enlargementThe radius of the segment 14002 is larger than the radius of the smaller expanded diameter segment 14001 by b 2 Said b is 1 Preferably 10cm to 20cm, b 2 Preferably 10cm to 50cm, a 1 Preferably 50cm to 20cm, a 2 The value is preferably 5 to 20cm.
The continuous pressure relief method for the interior of the surrounding rock of the continuous large-deformation roadway can be used in coal roadways, soft rock roadways and broken surrounding rock roadways.
In conclusion: the invention provides a continuous pressure relief system and a method for the interior of surrounding rock of a continuous large-deformation roadway, which solve the problem that the method for constructing a large pressure relief hole by using traditional equipment is difficult to meet the requirement of constructing the pressure relief hole for multiple times; all the used equipment can be recycled, so that the economic benefit is remarkable; the equipment is convenient to install and use, the coal discharging and transporting speed is high, and the normal and efficient production is not influenced completely; the pressure measuring ring bag 25 is arranged on a cutting tooth screw rod, deformation of a pressure relief hole can be monitored on the periphery of the pressure measuring ring bag 25, and the pressure measuring ring bag 25 is extruded, so that coal discharging pressure relief is needed in early warning, and meanwhile, the pressure transmission pipe 28 is arranged inside the screw rod and is not influenced by disordered deformation of the pressure relief hole and rotation coal discharging of the screw rod; one side of the pressure relief hole forms a high-bearing-capacity curing area by spraying curing materials, the curing area and the fixing and protecting pipe form an anchoring whole, and a counter-pulling area is formed by the pipe blocking tray 24, so that the pressure relief hole can be effectively prevented from being damaged and developed to the anchoring area, and the stability of surrounding rocks of the anchoring area is realized; a plurality of closed/nearly closed pressure relief holes in the surrounding rock of the roadway 13 even in the whole roadway can discharge coal at the same time, and an effective pressure relief space is formed again; the implementation space is not limited, and the applicability is strong; has very wide and important popularization and application values.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (12)
1. The utility model provides a last big deformation tunnel country rock inside pressure relief system in succession which characterized in that includes:
a power assembly;
one end of the non-cutting-tooth screw rod is connected with the power assembly, and the other end of the non-cutting-tooth screw rod is in threaded connection with the cutting-tooth screw rod;
one end of the drill bit is in threaded connection with the cutting pick screw rod, a cutting pick is arranged on the side face of the other end of the drill bit, and the diameter of the rod body of the drill bit is the same as that of the cutting pick screw rod;
the cutting tooth-free screw rod is arranged in the limiting support assembly, and one end of the limiting support assembly, which is close to the power assembly, is connected with the coal caving assembly;
the pressure measuring ring bag is fixed in the middle of the cutting tooth screw rod and is connected with a pressure transmitting pipe, the pressure transmitting pipe is located inside the cutting tooth screw rod and penetrates through the limiting support assembly to be connected with an external pressure gauge, and the pressure measuring ring bag, the pressure transmitting pipe and the pressure gauge rotate simultaneously and do not move relatively;
and the stepped spray head is arranged in the middle of the limiting support assembly, the smaller diameter expanding section and the large diameter expanding section through a centering ring.
2. The continuous pressure relief system in the continuous large deformation roadway surrounding rock according to claim 1, wherein the power assembly comprises:
the motor fixing box is used for realizing leveling and fixing through two fixing pull rods and a length adjusting nut and is rotationally connected with the two fixing pull rods;
one end of the motor fixing cover is rotatably connected with the motor fixing box, and the other end of the motor fixing cover is fixedly connected with the motor fixing box through a fixing cover by using a bolt;
and the motor is arranged in the motor fixing box, and one end of the pick-free screw rod penetrates through a screw rod passage hole of the motor fixing box to be in threaded connection with the output end of the motor.
3. The continuous pressure relief system in continuous large deformation roadway surrounding rock of claim 2, wherein the limit support assembly comprises:
protecting the pipe;
one end of the fixing and protecting pipe is in threaded connection with one end of the protecting pipe;
one end of the limiting pipe is in threaded connection with the other end of the protective pipe, and the pick-free spiral rod is positioned in the fixed protective pipe, the protective pipe and the limiting pipe;
the pipe blocking tray is arranged on the limiting pipe through a threaded connecting sleeve and used for preventing the curing area from moving to the pressure relief hole space.
4. The continuous pressure relief system for the interior of the surrounding rock of the continuous large-deformation roadway according to claim 3, wherein a first stay tube pin hole, a second stay tube pin hole and a third stay tube pin hole are respectively formed in one end of the fixed protection tube, one end of the fixed protection tube and one end of the fixed protection tube are respectively provided with the first stay tube pin hole, the second stay tube pin hole and the third stay tube pin hole, and stay tube pins are required to be respectively inserted into the first stay tube pin hole, the second stay tube pin hole and the third stay tube pin hole in the pulling and recovering stage.
5. The system and the method for continuously relieving pressure in surrounding rocks of the continuous large-deformation roadway according to claim 4, wherein one end of the fixing and protecting pipe is a fixing end of a curing area, and concave-convex grooves are distributed on the fixing end to realize tight combination with a curing material.
6. The continuous pressure relief system in the continuous large deformation roadway surrounding rock according to claim 5, wherein the coal caving assembly comprises:
the transfer cover is in threaded connection with one end of the limiting pipe, and a rod body at one end of the pick-free spiral rod movably penetrates through a spiral rod channel of the transfer cover;
the coal discharging cover is arranged at the output end of the transfer channel at the bottom end of the transfer cover;
and the conveying belt is arranged on the bottom side of the output end of the coal discharge cover.
7. The continuous pressure relief system for the interior of the roadway surrounding rock with the continuous large deformation according to claim 6, wherein forward nozzles and inclined nozzles are distributed on the stepped nozzles, the direction of the nozzles towards the pressure relief hole is sequentially reduced, the weight of the sprayed objects is sequentially reduced within the same time, the nozzles are connected into a whole, the middle positioning ring is connected with two sides through constraint nuts for positioning, and the stepped nozzles are positioned in the middle of the limiting support assembly and the smaller diameter expansion section and the large diameter expansion section.
8. The continuous pressure relief system for the interior of surrounding rocks of the continuous large-deformation roadway according to claim 7, wherein the length of the drill bit is preferably 50 cm-150 cm.
9. The method for continuously relieving the pressure in the surrounding rock of the continuous large-deformation roadway, which is characterized in that the system for continuously relieving the pressure in the surrounding rock of the continuous large-deformation roadway, disclosed by claim 8, is adopted, and comprises the following steps of:
s1, sequentially installing a fixing protection pipe, a protection pipe and a limiting pipe on each pressure relief hole, enabling the fixing protection pipe to reach the edge of the pressure relief hole close to the roadway side and be stopped, adopting a stepped spray head to rotate and spray a cured substance to form a curing area, integrally pushing the fixing protection pipe, the protection pipe and the limiting pipe to a designed position, supplementing and spraying the cured substance, enabling one end of the fixing protection pipe and the curing area formed by the cured substance to form an integral bearing body, and then withdrawing the stepped spray head;
s2, installing a pipe blocking tray at one end of the limiting pipe, so that the pipe blocking tray forms a counter-pulling anchoring whole body with the curing area through the fixing and protecting pipe, the limiting pipe and the curing area, the stability of coal bodies between the curing area and the roadway side is realized, meanwhile, the coal bodies on one side of the curing area of the pressure relief hole cannot be continuously plasticized, and the long-term stability of the anchoring area can be realized;
s3, sequentially installing a drill bit, a cutting tooth screw rod, a cutting tooth-free screw rod, a transfer cover, a coal discharge cover, a motor fixing box and a motor;
s4, installing a pressure gauge, and filling liquid or gas into the pressure measuring ring bag through a liquid injection interface;
s5, the pressure of the pressure measuring ring bag is continuously increased, the volume of the pressure relief hole is gradually closed, the pressure relief effect is obviously weakened, the motor and the conveying belt are started at the moment, the coal body in the pressure relief hole is immediately transferred out, the effective space of the pressure relief hole is formed again, and rapid hole forming pressure relief is realized;
and S6, repeating the step S5 to realize continuous pressure relief of the interior of the surrounding rock.
10. The method for continuously releasing the pressure in the surrounding rock of the continuous large-deformation roadway according to claim 9, wherein for a mining roadway, all devices need to be recovered before a working face is mined to the pressure-releasing hole, and the steps of the recovery device are as follows:
s10, sequentially removing a motor, a pressure gauge, a motor fixing box, a transfer cover, a coal discharge cover and a pipe blocking tray;
s20, then installing a switching nut on a group of anchor rods of the roadway, and installing a pipe pulling pin and a switching pipe pin on a third pipe pulling pin hole of the limiting pipe;
s30, connecting a bidirectional telescopic hydraulic cylinder through a draw hook, then respectively connecting the draw hook to a switching nut and a switching pipe pin, and pulling out a limiting pipe through the bidirectional telescopic hydraulic cylinder;
and S40, repeating the step S30, and respectively pulling out the protective pipe and the fixed protective pipe.
11. The method for continuously releasing the pressure in the surrounding rock of the continuous large-deformation roadway according to claim 10, wherein one end of the pressure release hole is provided with two expanding sections, and the width of the smaller expanding section is a 1 The radius of the smaller expanding section is b larger than that of the pressure relief hole 1 The width of the large expanding section is a 2 The radius of the large expanding section is larger than that of the small expanding section by b 2 Said b is 1 Preferably 10cm to 20cm, b 2 Preferably 10cm to 50cm, a 1 Preferably 50cm to 20cm, a 2 The value is preferably 5 to 20cm.
12. The method for continuously relieving pressure in the surrounding rock of the continuous large-deformation roadway according to claim 11 is applied to coal roadways, soft rock roadways and broken surrounding rock roadways.
Priority Applications (2)
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| CN202310182836.7A CN115977637B (en) | 2023-03-01 | 2023-03-01 | Continuous pressure relief system and method for interior of surrounding rock of continuous large-deformation roadway |
| ZA2023/06377A ZA202306377B (en) | 2023-03-01 | 2023-06-20 | Continuous pressure relief system and method for the inside of surrounding rock of continuous large deformation roadways |
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| CN202310182836.7A CN115977637B (en) | 2023-03-01 | 2023-03-01 | Continuous pressure relief system and method for interior of surrounding rock of continuous large-deformation roadway |
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Cited By (1)
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| CN116398206A (en) * | 2023-06-01 | 2023-07-07 | 中国矿业大学(北京) | Roadway surrounding rock anchoring and surrounding rock internal key area pressure relief coupling control system and method |
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| Publication number | Publication date |
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| ZA202306377B (en) | 2024-01-31 |
| CN115977637B (en) | 2023-08-08 |
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