CN113550768A - Y-shaped roadway supporting method and auxiliary equipment for roadway with high rock burst - Google Patents
Y-shaped roadway supporting method and auxiliary equipment for roadway with high rock burst Download PDFInfo
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- CN113550768A CN113550768A CN202111030080.1A CN202111030080A CN113550768A CN 113550768 A CN113550768 A CN 113550768A CN 202111030080 A CN202111030080 A CN 202111030080A CN 113550768 A CN113550768 A CN 113550768A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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Abstract
The invention belongs to the technical field of roadway support, and particularly relates to a Y-shaped roadway support method and auxiliary equipment for a roadway with high rock burst, which comprise the following steps: step one, digging a pouring pit: digging a pouring foundation pit at a group of bending positions of Y-shaped bifurcation positions in the roadway; secondly, anchor rod and anchor cable support: carrying out anchor rod and anchor cable support on the inner wall and the top wall of the dug pouring foundation pit; step three, pressurizing and pouring: arranging reinforcing steel bars and erecting a formwork in the dug pouring foundation pit, and pouring concrete by using a pressurized pouring device; grouting the bottom of the roadway: grouting the bottom end in the roadway on two sides of the poured and formed pouring column; grouting the top wall of the roadway; grouting the top wall in the roadway in the direction opposite to the formed pouring column; step six, grouting the side wall of the roadway: grouting is conducted on the vertical side wall in the roadway in the direction of the two sides of the formed pouring column, and in the mode, the supporting strength of the pouring column to Y-shaped weak positions forked in the roadway is improved.
Description
Technical Field
The invention belongs to the technical field of roadway support, and particularly relates to a Y-shaped roadway support method and auxiliary equipment for a roadway with high rock burst.
Background
The roadway is various passages drilled between the ground surface and an ore body and used for carrying ore, ventilating, draining water, pedestrians, various necessary preparation projects for newly excavating the ore extracted by metallurgical equipment and the like, and the passages are collectively called as the roadway and have important significance for coal mine construction and production by adopting roadway support to keep the smoothness of the roadway and the stability of surrounding rocks. In the Y type position of the inside bifurcation in tunnel, its turn is the arc of evagination, and it is the same with tunnel internal stress direction, belongs to the fragile position in the tunnel, needs carry out corresponding strut, and current strut is at the turn and inwards dig the pouring hole of establishing the cylindricality, pours the hole bottom and extends to under the tunnel bottom, pours the hole top and extends to above the tunnel top, struts through pouring concrete in the pouring hole.
Disclosure of Invention
In recent years, along with the deepening of mine mining, the depth of a plurality of mines exceeds kilometers, the mine pressure in deep mining is gradually obvious, local sections are very strong and show obvious rock burst phenomenon, the phenomenon of roadway collapse affected by the rock burst is more and more serious, mine safety accidents caused by the rock burst occur occasionally, the rock burst generated in the coal mining process can cause the instantaneous damage of a working face or a coal rock layer structure of the roadway by suddenly, rapidly and violently releasing strain energy, the serious damage of the roadway and the serious casualties of personnel are caused, particularly the instantaneous damage occurs at Y-shaped positions forked in the roadway, the connection strength of the traditional concrete pouring support mode and the roadway wall is not enough, and the support under the condition of the rock burst can not be met, the invention provides a Y-shaped roadway support method and auxiliary equipment for the roadway with high rock burst, the Y-shaped weak position forked in the tunnel is replaced by the pouring column of the reinforced concrete structure, meanwhile, the bonding strength of the pouring column and the tunnel wall is improved by the anchor rod and the anchor cable, and the supporting strength of the pouring column on the Y-shaped weak position forked in the tunnel is further improved by grouting the tunnel wall beside the pouring column.
The invention provides the following technical scheme:
a Y-shaped roadway supporting method for a roadway with high rock burst comprises the following steps:
step one, digging a pouring pit: digging a pouring foundation pit at a group of bending positions of Y-shaped bifurcation positions in the roadway;
secondly, anchor rod and anchor cable support: carrying out anchor rod and anchor cable support on the inner wall and the top wall of the dug pouring foundation pit;
step three, pressurizing and pouring: arranging reinforcing steel bars and erecting a formwork in the dug pouring foundation pit, and pouring concrete by using a pressurized pouring device;
grouting the bottom of the roadway: grouting the bottom end in the roadway on two sides of the poured and formed pouring column;
grouting the top wall of the roadway; grouting the top wall in the roadway in the direction opposite to the formed pouring column;
step six, grouting the side wall of the roadway: and grouting the vertical side walls in the roadway in the directions of two sides of the formed pouring column.
The horizontal section of the pouring foundation pit dug in the first step is fan-shaped, the angle of the fan-shaped corner of the pouring foundation pit is arc-shaped, the bottom end of the pouring foundation pit is lower than the bottom end of the roadway, and the top end of the pouring foundation pit is higher than the top end of the roadway.
And the concrete poured under pressure in the third step is marked as C45, and the formwork in the third step is arranged on the edge of the side wall of the roadway beyond the pouring foundation pit.
And in the third step, when the concrete is poured under pressure, firstly, pouring concrete in the area of the pouring foundation pit at the lower part of the bottom end of the roadway, and then, carrying out formwork-supporting layered pouring on the part of the pouring foundation pit at the upper end of the bottom of the roadway.
And in the fourth step, the grouting range of the roadway bottom is a common part of the orthographic projection of a circle drawn by taking the center of the bottom end of the poured casting column as the center of a circle and taking two to five times of the radius length of the horizontal section of the poured casting column as the radius on the roadway bottom and the roadway bottom.
And in the fifth step, the grouting range of the top wall of the roadway is a common part of the normal projection of a circle drawn by taking the center of the bottom end of the poured casting column as the center of a circle and taking two to five times of the radius length of the horizontal section of the poured casting column as the radius on the top wall of the roadway and the top wall of the roadway.
And in the sixth step, the grouting range of the side wall of the roadway is a common area of the side wall of the roadway and a space column formed between the bottom end and the top end of the roadway by using the center of the bottom end of the poured casting column as a circle center and using a circle drawn by using two to five times of the radius length of the horizontal section of the poured casting column as a radius.
The utility model provides a Y type tunnel support auxiliary assembly for high rock burst tunnel, auxiliary assembly is the pressurization pouring equipment in step six, pressurization pouring equipment is including mixer, pressurized concrete conveying pump truck and delivery pump pipe, the mixer is including stirring support, rotating turret, carousel, headstock, agitator motor, driving pulley, driven pulley, pivot, cooperation gear, fixed sleeve, ring gear, churn and rotation connecting rod, pressurized concrete conveying pump truck is including bottom plate, flexible landing leg, pump box, hopper and discharging pipe, flexible landing leg is fixed in bottom plate bottom four corners, pump box and hopper are located the bottom plate, be provided with the delivery pump in the pump box, discharging pipe intercommunication hopper setting, the delivery pump pipe is including connecting elbow, conveying pipeline, ejection of compact elbow and connecting the snap ring, connecting the elbow, the equipment of pouring of pressurizing, the pressurization is pouring equipment in step six, the pump truck is equipped with, the pressurized concrete conveying pump truck, carousel, headstock, power box, agitator motor, driving pulley, driven pulley, pivot, cooperation gear, fixed sleeve, tooth ring, churn and discharging pipe, the delivery pump truck, delivery pipe are equipped with the delivery pipe, the delivery pump, delivery pipe, delivery pump pipe, delivery pipe, the material conveying pipe and the material discharging elbow are connected through a connecting snap ring, and the connecting elbow and the material discharging pipe are connected through the connecting snap ring.
Wherein, agitator motor, drive pulley and driven pulley are located the headstock, drive pulley and driven pulley belt transmission cooperation, drive pulley installs at the agitator motor output, the pivot is fixed at driven pulley tip and is rotated and run through the headstock and the cooperation gear links to each other, fixed sleeve rotates and installs in headstock and churn side, the pivot is rotated and is passed through fixed sleeve, the ring gear is fixed at the churn lateral wall, cooperation gear and ring gear meshing, the rotation connecting rod rotates at churn bottom center and fixes on the rotating turret.
Compared with the prior art, the invention has the beneficial effects that: digging a pouring foundation pit at a group of bending parts at Y-shaped forking positions in the tunnel, wherein the horizontal section of the pouring foundation pit is in a fan shape, the corner part of the fan shape is in a circular arc shape, the pouring foundation pit with the shape ensures that the shape of a formed pouring column is similar to the Y-shaped forking position in the tunnel, compared with the traditional cylindrical pouring foundation pit, the shape can save materials and does not occupy the channel space in the tunnel under the same radius, when the pouring foundation pit is dug, the bottom end of the pouring foundation pit is lower than the bottom end of the tunnel, the top end of the pouring foundation pit is higher than the top end of the tunnel, after the digging of the pouring foundation pit is finished, carrying out anchor rod and anchor cable support on the inner wall and the top wall of the dug pouring foundation pit, then carrying out reinforcing steel bar arrangement and formwork support in the pouring foundation pit, the formwork exceeds the edge of the pouring foundation pit on the side wall, when the concrete pouring is carried out, the formwork range exceeds the edge of the pouring foundation pit on the side wall of the tunnel, thereby avoiding the concrete overflow, during pressure pouring, the concrete is combined with the wall of the pouring foundation pit more compactly, after formwork support is completed, the concrete pressure pouring is carried out, the concrete pouring is carried out on the area of the pouring foundation pit at the lower part of the bottom end of the roadway firstly, then formwork support layered pouring is carried out on the part of the pouring foundation pit at the upper end of the bottom of the roadway, heat dissipation can be carried out in time in a layered pouring mode, the peak of hydration heat is reduced, large-volume concrete temperature cracks are reduced, and finally grouting is carried out on the bottom, the top wall and the side wall of the roadway, the grouting range of the bottom of the roadway is the normal projection of a circle drawn by taking the center of the bottom end of the poured pouring column as the circle center and the double radius length of the horizontal section of the poured pouring column as the radius, and the grouting range of the top wall of the roadway is the normal projection of the circle drawn by taking the center of the bottom end of the poured column as the circle center, the heat dissipation of the top wall of the roadway is carried out by the normal projection of the circle center of the bottom of the circle, The roadway of the periphery of the pouring column can be further reinforced by grouting, and the supporting capability of the roadway is improved.
The parts of the device not involved are the same as or can be implemented using prior art.
Drawings
FIG. 1 is a schematic view of a supporting method according to the present invention;
FIG. 2 is a schematic view of the auxiliary apparatus according to the present invention;
FIG. 3 is a schematic view of the mixer of the present invention;
FIG. 4 is a schematic side view of the blender of the present invention;
FIG. 5 is a schematic view of the pressurized concrete pump truck according to the present invention;
fig. 6 is a schematic diagram of the position of a foundation pit and the grouting position in the invention.
In the figure: 1. a blender; 100. stirring the bracket; 101. a rotating frame; 102. a turntable; 103. a power box; 104. a stirring motor; 105. a drive pulley; 106. a driven pulley; 107. a rotating shaft; 108. a mating gear; 109. fixing the sleeve; 110. a toothed ring; 111. a mixing drum; 112. rotating the connecting rod; 2. a pressurized concrete delivery pump truck; 200. a base plate; 201. a telescopic leg; 202. a pump box; 203. a hopper; 204. a discharge pipe; 3. a delivery pump tube; 300. connecting the elbow; 301. a delivery pipe; 302. a discharge elbow; 303. and a snap ring is connected.
Detailed Description
Referring to fig. 1-6, the present invention provides the following technical solutions:
a Y-shaped roadway supporting method for a roadway with high rock burst comprises the following steps:
step one, digging a pouring pit: digging a pouring foundation pit at a group of bending positions of Y-shaped bifurcation positions in the roadway;
secondly, anchor rod and anchor cable support: carrying out anchor rod and anchor cable support on the inner wall and the top wall of the dug pouring foundation pit;
step three, pressurizing and pouring: arranging reinforcing steel bars and erecting a formwork in the dug pouring foundation pit, and pouring concrete by using a pressurized pouring device;
grouting the bottom of the roadway: grouting the bottom end in the roadway on two sides of the poured and formed pouring column;
grouting the top wall of the roadway; grouting the top wall in the roadway in the direction opposite to the formed pouring column;
step six, grouting the side wall of the roadway: grouting vertical side walls in the roadway in the directions of two sides of the formed pouring column;
by the support method, the Y-shaped weak position forked in the roadway is replaced by the pouring column of the steel-concrete structure, meanwhile, the bonding strength of the pouring column and the roadway wall is improved by using the anchor rod and the anchor cable, and the support strength of the pouring column on the Y-shaped weak position forked in the roadway is further improved by grouting the roadway wall beside the pouring column;
the horizontal section of the casting foundation pit dug in the first step is in a fan shape, the corner of the fan shape is in a circular arc shape, the bottom end of the casting foundation pit is lower than the bottom end of the roadway, and the top end of the casting foundation pit is higher than the top end of the roadway; the method is characterized in that a casting foundation pit with a fan-shaped horizontal section and arc-shaped fan-shaped corners is dug, so that the shape of a formed casting column is similar to the shape of a Y-shaped position forked in a roadway, and compared with a traditional cylindrical casting foundation pit, the shape can save materials under the same radius and does not occupy the channel space in the roadway;
the concrete poured under pressure in the third step is marked as C45, and the formwork in the third step is arranged on the edge of the side wall of the roadway beyond the pouring foundation pit; when concrete pouring is carried out, the formwork supporting range exceeds the edge of the pouring foundation pit on the side wall of the roadway, so that concrete can be prevented from overflowing, and the combination of the concrete and the wall of the pouring foundation pit is more compact during pressure pouring;
in the third step, when concrete is poured under pressure, firstly, concrete is poured in the area of the pouring foundation pit at the lower part of the bottom end of the roadway, and then formwork support layered pouring is carried out on the part of the pouring foundation pit at the upper end of the bottom of the roadway; the heat can be dissipated in time by adopting a layered pouring mode, the hydration heat peak is reduced, and the temperature cracks of mass concrete can be reduced;
in the fourth step, the grouting range of the roadway bottom is a common part of the normal projection of a circle drawn by taking the center of the bottom end of the poured casting column as the center of a circle and taking two to five times of the radius length of the horizontal section of the poured casting column as the radius on the roadway bottom and the roadway bottom; grouting is carried out on the part of the roadway bottom within the range, so that the periphery of the bottom end of the pouring column can be further reinforced, and the supporting capability of the pouring column is improved;
in the step five, the grouting range of the top wall of the roadway is the common part of the normal projection of a circle drawn by taking the center of the bottom end of the poured casting column as the center of a circle and taking two to five times of the radius length of the horizontal section of the poured casting column as the radius on the top wall of the roadway and the top wall of the roadway; grouting is carried out on the part of the top wall of the roadway, which is positioned in the cover range, so that the periphery of the top end of the pouring column can be further reinforced, and the supporting capability of the pouring column is improved;
in the sixth step, the grouting range of the side wall of the roadway is a common area of the side wall of the roadway and a space column formed between the bottom end and the top end of the roadway by using the center of the bottom end of the pouring column after pouring molding as a circle center and using a circle drawn by using two to five times of the radius length of the horizontal section of the pouring column after pouring molding as a radius; grouting is carried out on the part of the side wall of the roadway, which is positioned in the range, so that the periphery of the side wall of the pouring column can be further reinforced, and the supporting capability of the pouring column is improved;
a Y-shaped roadway support auxiliary device for a roadway with high rock burst is a pressurizing and pouring device in step six, the pressurizing and pouring device comprises a stirring machine (1), a pressurizing concrete conveying pump truck (2) and a conveying pump pipe (3), the stirring machine (1) comprises a stirring support (100), a rotating frame (101), a rotating disc (102), a power box (103), a stirring motor (104), a driving belt pulley (105), a driven belt pulley (106), a rotating shaft (107), a matching gear (108), a fixed sleeve (109), a gear ring (110), a stirring cylinder (111) and a rotating connecting rod (112), the pressurizing concrete conveying pump truck (2) comprises a bottom plate (200), telescopic supporting legs (201), a pump box (202), a hopper (203) and a discharge pipe (204), the telescopic supporting legs (201) are fixed at four corners of the bottom end of the bottom plate (200), the pump box (202) and the hopper (203) are positioned on the bottom plate (200), a conveying pump is arranged in the pump box (202), the discharge pipe (204) is communicated with the hopper (203), the conveying pump pipe (3) comprises a connecting elbow (300), a conveying pipe (301), a discharge elbow (302) and a connecting snap ring (303), the connecting elbow (300), the conveying pipe (301) and the discharge elbow (302) are connected through the connecting snap ring (303), and the connecting elbow (300) is connected with the discharge pipe (204) through the connecting snap ring (303);
the stirring device is characterized in that the stirring motor (104), the driving belt pulley (105) and the driven belt pulley (106) are located in the power box (103), the driving belt pulley (105) is in belt transmission fit with the driven belt pulley (106), the driving belt pulley (105) is installed at the output end of the stirring motor (104), the rotating shaft (107) is fixed at the end of the driven belt pulley (106) and rotatably penetrates through the power box (103) to be connected with the matching gear (108), the fixing sleeve (109) is rotatably installed on the side faces of the power box (103) and the stirring cylinder (111), the rotating shaft (107) rotates through the fixing sleeve (109), the toothed ring (110) is fixed on the side wall of the stirring cylinder (111), the matching gear (108) is meshed with the toothed ring (110), and the rotating connecting rod (112) rotates at the center of the bottom end of the stirring cylinder (111) and is fixed on the rotating frame (101);
the working principle and the using process of the invention are as follows:
when the device is used, firstly, a pouring foundation pit is dug at a group of bending positions which are forked into Y-shaped positions in a tunnel, the dug positions and the dug shapes are shown in figure 6, the horizontal section of the pouring foundation pit is fan-shaped, the fan-shaped angle part is circular arc-shaped, the pouring foundation pit with the shape enables the shape of a formed pouring column to be similar to the Y-shaped position shape forked in the tunnel, compared with the traditional cylindrical pouring foundation pit, under the same radius, the shape can save materials, meanwhile, the channel space in the tunnel cannot be occupied, the bottom end of the pouring foundation pit is lower than the bottom end of the tunnel when the pouring foundation pit is dug, the top end of the pouring foundation pit is higher than the top end of the tunnel, after the digging of the pouring foundation pit is finished, anchor rod and anchor cable supporting are carried out on the inner wall and the top wall of the dug pouring foundation pit, then, reinforcing steel bars are arranged and supporting molds are arranged in the pouring foundation pit and exceed the edge of the tunnel side wall of the pouring foundation pit, when concrete pouring is carried out, the formwork supporting range exceeds the edge of the pouring foundation pit on the side wall of the roadway, so that concrete can be prevented from overflowing, the combination of the concrete and the pouring foundation pit wall is more compact during pressure pouring, after the formwork supporting is finished, the concrete pressure pouring is carried out, the concrete pouring is firstly carried out on the area of the pouring foundation pit at the lower part of the bottom end of the roadway, then the formwork supporting layered pouring is carried out on the part of the pouring foundation pit at the upper end of the bottom of the roadway, the heat can be timely dissipated by adopting a layered pouring mode, the hydration heat peak is reduced, the large-volume concrete temperature cracks are favorably reduced, and finally the bottom, the top wall and the side wall of the roadway are grouted, the grouting range of the bottom of the roadway is that the orthographic projection of a circle drawn on the bottom of the roadway by taking the center of the bottom end of the pouring column after the pouring molding as the center and the double of the radius length of the horizontal section of the pouring column after the pouring molding as the radius and the common part of the bottom end of the roadway are adopted, the grouting range of the roadway top wall is the common part of the orthographic projection of a circle drawn on the roadway top wall by taking the center of the bottom end of the poured casting column as the center of a circle and two times of the radius length of the horizontal section of the poured casting column as the radius and the roadway top wall, the grouting range of the roadway side wall is the common area of the roadway side wall and a space column formed between the bottom end and the top end of the roadway by taking the center of the bottom end of the poured casting column as the center of a circle and drawing a circle by taking two times of the radius length of the horizontal section of the poured casting column as the radius, the concrete grouting direction is shown in figure 6, the grouting can further reinforce the roadway of the periphery of the poured casting column to improve the supporting capability of the roadway, in the process of supporting and casting concrete, a mixer (1) is used for producing concrete in the roadway, the concrete is produced according to the requirement of the C45 specification, the raw materials are placed in a mixing drum (111), starting a stirring motor (104), under the cooperation of a belt transmission rod of a driving belt pulley (105) and a driven belt pulley (106), a rotating shaft (107) drives a matching gear (108) to rotate, under the cooperation of the matching gear (108) and a toothed ring (110), the rotation of a stirring drum (111) is realized, the production of concrete is carried out, after the production of the concrete is completed, the stirring motor (104) is closed, the stirring drum (111) is rotated by utilizing a turntable (102), the internal concrete is poured into a hopper (203) on a pressurized concrete conveying pump truck (2) below, the concrete is conveyed, the pressurized concrete conveying pump truck (2) is started, and the concrete is poured by the cooperation of a discharge pipe (204) and a conveying pump pipe (3).
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A Y-shaped roadway supporting method for a roadway with high rock burst is characterized in that: the method comprises the following steps:
step one, digging a pouring pit: digging a pouring foundation pit at a group of bending positions of Y-shaped bifurcation positions in the roadway;
secondly, anchor rod and anchor cable support: carrying out anchor rod and anchor cable support on the inner wall and the top wall of the dug pouring foundation pit;
step three, pressurizing and pouring: arranging reinforcing steel bars and erecting a formwork in the dug pouring foundation pit, and pouring concrete by using a pressurized pouring device;
grouting the bottom of the roadway: grouting the bottom end in the roadway on two sides of the poured and formed pouring column;
grouting the top wall of the roadway; grouting the top wall in the roadway in the direction opposite to the formed pouring column;
step six, grouting the side wall of the roadway: and grouting the vertical side walls in the roadway in the directions of two sides of the formed pouring column.
2. The Y-shaped roadway supporting method for the roadway with the high rock burst as claimed in claim 1, wherein the method comprises the following steps: the horizontal section of the pouring foundation pit dug in the first step is fan-shaped, the fan-shaped angle portion of the pouring foundation pit is arc-shaped, the bottom end of the pouring foundation pit is lower than the bottom end of the roadway, and the top end of the pouring foundation pit is higher than the top end of the roadway.
3. The Y-shaped roadway supporting method for the roadway with the high rock burst as claimed in claim 1, wherein the method comprises the following steps: and the concrete poured under pressure in the third step is marked as C45, and the supporting formwork in the third step is arranged on the edge of the side wall of the roadway beyond the pouring foundation pit.
4. The Y-shaped roadway supporting method for the roadway with the high rock burst as claimed in claim 1, wherein the method comprises the following steps: and in the third step, when concrete is poured under pressure, firstly, pouring concrete in the area of the pouring foundation pit at the lower part of the bottom end of the roadway, and then, carrying out formwork-supporting layered pouring on the part of the pouring foundation pit at the upper end of the bottom of the roadway.
5. The Y-shaped roadway supporting method for the roadway with the high rock burst as claimed in claim 1, wherein the method comprises the following steps: and in the fourth step, the grouting range of the roadway bottom is the common part of the normal projection of a circle drawn by taking the center of the bottom end of the poured casting column as the center of a circle and taking two to five times of the radius length of the horizontal section of the poured casting column as the radius on the roadway bottom and the roadway bottom.
6. The Y-shaped roadway supporting method for the roadway with the high rock burst as claimed in claim 1, wherein the method comprises the following steps: and in the step five, the grouting range of the top wall of the roadway is the common part of the normal projection of a circle drawn by taking the center of the bottom end of the poured casting column as the center of a circle and taking two to five times of the radius length of the horizontal section of the poured casting column as the radius on the top wall of the roadway and the top wall of the roadway.
7. The Y-shaped roadway supporting method for the roadway with the high rock burst as claimed in claim 1, wherein the method comprises the following steps: and in the sixth step, the grouting range of the side wall of the roadway is a common area of the side wall of the roadway and a space column formed between the bottom end and the top end of the roadway by using the center of the bottom end of the poured casting column as a circle center and using a circle drawn by using two to five times of the radius length of the horizontal section of the poured casting column as a radius.
8. The Y-shaped roadway supporting method for the roadway with the high rock burst as claimed in claim 1, wherein the method comprises the following steps: the concrete mixing and stirring device is characterized by further comprising support auxiliary equipment, the auxiliary equipment is pressurized pouring equipment in the sixth step, the pressurized pouring equipment comprises a stirring machine, a pressurized concrete conveying pump truck and a conveying pump pipe, the stirring machine comprises a stirring support, a rotating frame, a rotating disc, a power box, a stirring motor, a driving belt pulley, a driven belt pulley, a rotating shaft, a matching gear, a fixed sleeve, a toothed ring, a stirring cylinder and a rotating connecting rod, the stirring motor, the driving belt pulley and the driven belt pulley are located in the power box, the driving belt pulley is in belt transmission matching with the driven belt pulley, the driving belt pulley is installed at the output end of the stirring motor, the rotating shaft is fixed at the end part of the driven belt pulley and is connected with the matching gear in a rotating mode, the fixed sleeve is rotatably installed on the side face of the power box and the stirring cylinder, the rotating shaft is rotated to pass through the fixed sleeve, and the toothed ring is fixed on the side wall of the stirring cylinder, the utility model discloses a concrete pump truck, including pressure concrete pump truck, including bottom plate, flexible landing leg, pump box, hopper and discharging pipe, flexible landing leg fixes in bottom plate bottom four corners, pump box and hopper are located the bottom plate, be provided with the delivery pump in the pump box, discharging pipe intercommunication hopper sets up, the delivery pump pipe is including connecting elbow, conveying pipeline, ejection of compact elbow and connecting the snap ring, connect and link to each other through connecting the snap ring between elbow, conveying pipeline, the ejection of compact elbow, connect elbow and discharging pipe and link to each other through connecting the snap ring.
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| CN202111030080.1A CN113550768B (en) | 2021-09-03 | 2021-09-03 | Y-shaped roadway supporting method and auxiliary equipment for roadway with high rock burst |
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| CN202111030080.1A CN113550768B (en) | 2021-09-03 | 2021-09-03 | Y-shaped roadway supporting method and auxiliary equipment for roadway with high rock burst |
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| CN113550768B CN113550768B (en) | 2022-07-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203847127U (en) * | 2014-05-10 | 2014-09-24 | 许帮贵 | Device for supporting soft rock masses at roadway intersections in coal mine under dynamic pressure environment |
| CN105156114A (en) * | 2015-06-19 | 2015-12-16 | 中国矿业大学 | Enlarging repair and reinforcement method of roadways at crossing |
| KR101612800B1 (en) * | 2015-12-24 | 2016-04-15 | (주)우암건설 | Structural repair and Reinforcing method for concrete structures such as tunnel, bridge common duct and building by using fiber mesh and fiber reinforced cementitious matrix |
| CN206129285U (en) * | 2016-10-27 | 2017-04-26 | 山东科技大学 | Deep soft rock roadway under high stress crossover point supporting construction |
| CN106677796A (en) * | 2017-02-01 | 2017-05-17 | 连小林 | Supporting method of intersection of Y-type roadway |
-
2021
- 2021-09-03 CN CN202111030080.1A patent/CN113550768B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203847127U (en) * | 2014-05-10 | 2014-09-24 | 许帮贵 | Device for supporting soft rock masses at roadway intersections in coal mine under dynamic pressure environment |
| CN105156114A (en) * | 2015-06-19 | 2015-12-16 | 中国矿业大学 | Enlarging repair and reinforcement method of roadways at crossing |
| KR101612800B1 (en) * | 2015-12-24 | 2016-04-15 | (주)우암건설 | Structural repair and Reinforcing method for concrete structures such as tunnel, bridge common duct and building by using fiber mesh and fiber reinforced cementitious matrix |
| CN206129285U (en) * | 2016-10-27 | 2017-04-26 | 山东科技大学 | Deep soft rock roadway under high stress crossover point supporting construction |
| CN106677796A (en) * | 2017-02-01 | 2017-05-17 | 连小林 | Supporting method of intersection of Y-type roadway |
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| CN113550768B (en) | 2022-07-12 |
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