CN112879051B - Chamber structure in slope ramp extension period and construction method - Google Patents

Chamber structure in slope ramp extension period and construction method Download PDF

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Publication number
CN112879051B
CN112879051B CN202110361355.3A CN202110361355A CN112879051B CN 112879051 B CN112879051 B CN 112879051B CN 202110361355 A CN202110361355 A CN 202110361355A CN 112879051 B CN112879051 B CN 112879051B
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chamber
ramp
chamber wall
wall body
installing
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CN112879051A (en
Inventor
董亚宁
许如亭
王宏喜
韩立军
董云龙
刘光杰
王忠强
魏福海
葛洪亮
夏俨
方毅
郏威
丁开振
徐国宝
肖松丽
施红梅
袁锦锋
徐青
刘康
姚嗣伟
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Anhui Magang Luohe Mine Co ltd
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Anhui Magang Luohe Mine Co ltd
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D13/00Large underground chambers; Methods or apparatus for making them
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining 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
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining 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
    • E21D11/107Reinforcing elements therefor; Holders for the reinforcing elements
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00Setting anchoring-bolts
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F1/00Ventilation of mines or tunnels; Distribution of ventilating currents
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F16/00Drainage
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/103Dams, e.g. for ventilation
    • E21F17/12Dam doors

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Barrages (AREA)

Abstract

The invention discloses a chamber structure in a slope ramp extension period and a construction method, and belongs to the field of mine construction. The underground chamber structure comprises surrounding rocks, wherein the surrounding rocks are provided with inclined ramps, underground chamber walls extending along the length direction of the inclined ramps are arranged in the inclined ramps, the underground chamber walls are fixedly connected with the surrounding rocks, underground chamber channels are arranged in the underground chamber walls, waterproof gates are arranged at the inner side ends of the underground chamber channels, the outer side surfaces of the underground chamber walls are of arch structures, steel rails anchored into the surrounding rocks are arranged in the underground chamber walls, wedge-shaped wall structures adopted by conventional waterproof gate underground chambers can be replaced, and the underground chamber structure has better shearing resistance and friction resistance and excellent waterproof capacity on the basis of reducing construction quantity, construction strength and construction cost. The construction method can construct the chamber structure with higher strength, and the whole process is convenient to construct and has lower construction cost.

Description

Chamber structure in slope ramp extension period and construction method
Technical Field
The invention belongs to the technical field of mine construction, and particularly relates to a chamber structure in a slope ramp extension period and a construction method.
Background
Traditional most underground mines are well development, personnel, materials and supplies all reach all underground positions through auxiliary wells, ore extracted from the underground is lifted to the ground through a main well, and a vertical shaft is the only safe passage of the underground mine, so that the transportation of the personnel and the materials is very troublesome. At present, most underground mines are provided with inclined ramps which are directly connected with the earth surface, and the inclined ramps have the defects of large engineering quantity, long construction period and high manufacturing cost, but can be directly connected with all underground positions from the earth surface, so that the underground mine is beneficial to the transportation of personnel and materials, the efficiency and benefit are greatly improved, and the underground escape is the most reliable safety channel.
Mining industry exploitation has been hard developed for decades, and underground exploitation conditions for exploitation are becoming more and more complex, especially hydrogeological conditions, which bring about considerable problems for mine construction and production. In recent years, mine water inrush events often occur, resulting in huge property loss and life safety. At present, most of underground mines in China are built and produced in stages, so that for the underground mine in production, prevention and control of water in the slope expansion construction process are particularly important, and if no powerful and reliable guarantee measures are provided, once water in an aquifer is communicated, flood of a large mine can be caused, and huge loss is caused.
In general, after the underground mine is completely completed in the basic construction roadway engineering, a waterproof gate chamber is arranged in the lowest-level transportation roadway, and a chamber passage for transportation is arranged in the chamber in a front-back penetrating manner. The chamber is formed by directly casting concrete on surrounding rock, and generally, in order to ensure the structural stability of the chamber wall, a wedge structure is adopted in the surrounding rock, so that sufficient buffering force is provided for the waterproof gate chamber when floods occur, and the waterproof capability of the waterproof gate chamber is improved. However, when concrete is cast in wedge-shaped surrounding rock, the concrete is difficult to be closely connected with the top surrounding rock, and a closed shear pressure resistant wall is difficult to form, so that the impact resistance of the waterproof gate chamber is reduced. In particular, when the surrounding rock of the wedge-shaped structure is excavated and the concrete wall is cast in the wedge-shaped structure, the whole engineering quantity and the construction labor intensity are extremely large due to the complexity of the wedge-shaped structure, and the construction cost is greatly increased.
For example, the Chinese patent application number is: CN201811224361.9, publication date: patent literature on 2019, 2 months and 12 days discloses a water stopping device for underground water-proof gate chamber drainage ditch of mine, the device is arranged at the water-proof gate chamber drainage ditch, the water stopping device comprises: the first pipeline is embedded in the bearing wall of the waterproof gate and is connected with drainage ditches at two sides of the waterproof gate; the second pipeline is arranged in the drainage ditch in the waterproof gate chamber, and the second pipeline is connected with the first pipeline through a valve. As is evident from the figure, the chamber wall is cast in a wedge-shaped structure in the surrounding rock.
For another example, chinese patent application No.: CN201811198720.8, publication date: patent literature on 2019, 2 months and 12 days discloses an auxiliary drainage device for a mine underground water-proof gate chamber, which comprises: the first pipeline is embedded in the bearing wall of the waterproof gate chamber and is obliquely arranged; the water collecting tank is positioned in the waterproof gate chamber and is arranged below the first pipeline; and the first valve is arranged on the first pipeline and is used for controlling the communication or the closing of the first pipeline through the opening or the closing of the first valve.
The two schemes are related to underground water-proof gate chambers of mines, although the structures of the chamber walls are not described in the specification of the two schemes, the description and the drawings of the two schemes show that the chamber walls of the two schemes are cast and formed in surrounding rocks in a wedge-shaped structure, so that the problems of the wedge-shaped chamber walls exist. Although a non-wedge-shaped waterproof gate chamber wall exists in the prior art, the chamber wall is difficult to have a high-strength structure, and the shock resistance is not strong when floods occur.
Disclosure of Invention
1. Problems to be solved
Aiming at the problem that the wall structure of the existing underground mine waterproof gate chamber in the extension period is not ideal, the invention provides a chamber structure in the slope extension period, which replaces the wedge-shaped wall structure adopted by the conventional waterproof gate chamber, has better shearing resistance and friction resistance and excellent waterproof capability on the basis of reducing construction quantity, construction strength and construction cost.
The invention also provides a chamber construction method in the slope ramp extension period, which can construct a chamber structure with higher strength, and has the advantages of convenient whole process construction and lower construction cost.
2. Technical proposal
In order to solve the problems, the invention adopts the following technical scheme.
The utility model provides a chamber structure of ramp extension period, includes the country rock, the country rock has the ramp, be equipped with the chamber wall body that extends along the length direction of ramp in the ramp, chamber wall body and country rock fixed connection are equipped with the chamber passageway in the chamber wall body, and waterproof gate is equipped with to the inboard tip of chamber passageway, the lateral surface of chamber wall body is the arch structure, is equipped with the rail of anchor in the country rock in it.
As a further improvement of the technical scheme, a plurality of groups of steel rails are arranged on the chamber wall along the length direction of the chamber wall, and each group of steel rails has at least 8 steel rails; the length of each steel rail anchored into the surrounding rock is not less than 1000mm, and the length of each steel rail stretched into the wall body of the chamber is not less than 500mm.
As a further improvement of the technical scheme, a plurality of groups of anchor rods which are anchored into surrounding rocks are arranged on the chamber wall along the length direction of the chamber wall.
As a further improvement of the technical scheme, a drainage pipeline is arranged at the bottom of the chamber wall; the outer side end of the drainage pipeline is connected with a drainage ditch, and a sedimentation tank is arranged at the bottom of the inclined ramp at the inner side end of the drainage pipeline.
As a further improvement of the technical scheme, a high-pressure valve is arranged at the part of the outer side end of the drainage pipeline, which extends out of the wall of the chamber.
As a further improvement of the technical scheme, the upper part of the chamber wall body is provided with a ventilating duct; the inner side end of the ventilating duct is communicated with the inside of the inclined ramp, and the outer side end of the ventilating duct is connected with the fan.
As a further improvement of the technical scheme, longitudinal steel bars are arranged in the chamber wall body along the length direction of the chamber wall body, annular steel bars which are arranged in a crossing manner with the longitudinal steel bars are arranged along the circumferential direction of the chamber wall body, and the longitudinal steel bars and the annular steel bars are connected through tie bars.
As a further improvement of the technical scheme, the waterproof gate is provided with two pieces, and the two pieces of waterproof gate are respectively hinged with two sides of the inner side end part of the chamber channel and can seal the chamber channel.
As a further improvement of the technical scheme, a steel sleeve is arranged in the chamber wall body along the length direction of the chamber wall body.
A chamber construction method in a slope ramp extension period comprises the following steps:
s1, digging a slope ramp in surrounding rock;
s2, selecting the position of a chamber, mounting steel rails and anchor rods on the surrounding rock surface, mounting a drainage pipeline at the bottom of the ramp, and casting concrete;
s3, installing a waterproof gate frame, and casting concrete at the lower part of the chamber;
s4, binding longitudinal steel bars, annular steel bars and tie bars on two sides of the chamber, supporting wall templates on two sides and casting concrete;
s5, installing a ventilating duct at the upper part of the chamber;
s6, binding longitudinal steel bars, annular steel bars and tie bars at the upper part of the chamber, supporting an upper wall template and casting concrete;
s7, installing a waterproof gate on a waterproof gate frame;
s8, installing a high-pressure valve at a part of the outer side end of the drainage pipeline extending out of the chamber wall;
s9, enabling the outer end of the ventilating duct to be connected with a fan.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the chamber structure in the slope expansion period, the large steel rail anchored into the surrounding rock is arranged on the chamber wall, so that the connection strength of the chamber wall and the surrounding rock is effectively enhanced, and the chamber can have higher impact resistance even if a wedge-shaped wall structure is not adopted, thereby replacing the conventional wedge-shaped chamber wall structure, reducing the construction quantity and the construction strength and reducing the construction cost;
(2) According to the chamber structure in the slope expansion period, the plurality of groups of anchor rods with smaller sizes and anchored into surrounding rocks are arranged on the chamber wall, so that the connection strength of the chamber wall and the surrounding rocks can be enhanced, and the overall stability and the shock resistance of the chamber structure are improved;
(3) According to the chamber structure in the slope expansion period, the drainage pipeline is arranged at the bottom of the chamber, and the two ends of the drainage pipeline are respectively communicated with the sedimentation tank and the drainage ditch, so that accumulated water in the slope can smoothly flow out of the drainage pipeline in the expansion process, and normal expansion excavation work of the slope is ensured to be stably and continuously carried out;
(4) According to the chamber structure in the slope expansion period, the ventilating duct is arranged at the upper part of the chamber, so that air circulation in the slope can be accelerated, harmful gas in the slope can be discharged, the health of workers is guaranteed, and compared with the conventional arrangement of a fan or a ventilating duct at a chamber channel or other positions, the mounting structure is more reasonable, and the transportation work of the chamber channel is not influenced;
(5) According to the chamber structure in the slope expansion period, the reinforced bar structure and the steel sleeve which are reasonably arranged are arranged in the chamber wall, so that the integral strength of the chamber wall is effectively improved, and the integral stability and the shock resistance of the chamber structure are enhanced;
(6) The invention relates to a chamber structure in a slope expansion period, which is characterized in that two waterproof gates are respectively hinged with two sides of the inner side end part of a chamber wall, and can seal a chamber channel, the structure replaces the traditional single-door structure, the weight of each door is greatly reduced, the transportation and the installation are convenient, the chamber channel can be quickly sealed when a flood occurs, and the safety performance is greatly improved;
(7) According to the chamber structure in the slope expansion period, the reinforced concrete chamber is arranged in the stable surrounding rock, the ventilating duct is arranged at the upper part of the concrete chamber, the drainage duct structure is arranged at the bottom of the chamber, the waterproof gate is arranged at the inner side end of the chamber channel, the air duct waterproof cover plate is arranged at the inner side end of the ventilating duct, and the high-pressure valve is arranged at the outer side end of the drainage duct, so that the integral airtight shock resistance of the chamber can be formed, the large burst water burst can be prevented and controlled in the slope tunneling process, the normal tunneling of the slope can not be influenced, the safety in the slope tunneling process is ensured, and compared with the traditional wedge-shaped chamber wall, the structure is simple and reliable, and the construction cost is greatly reduced;
(8) The chamber construction method in the slope expansion period can build the chamber structure with high strength, good waterproof capability and ventilation capability, and is convenient in whole process construction and low in construction cost.
Drawings
FIG. 1 is a top cross-sectional view of a chamber structure;
FIG. 2 is a front cross-sectional view of the chamber structure;
FIG. 3 is a side cross-sectional view of the chamber structure rail in place;
fig. 4 is a side cross-sectional view of the chamber structure in place of the rebar;
FIG. 5 is a side cross-sectional view of the chamber structure in place of the anchor rods;
fig. 6 is a schematic installation view of longitudinal bars, loop bars and tie bars;
in the figure: 1. surrounding rock; 2. a ramp; 3. a chamber wall; 4. a chamber passageway; 5. a steel rail; 6. a bolt; 7. a drainage pipe; 8. a drainage ditch; 9. a sedimentation tank; 10. a ventilation duct; 11. a high pressure valve; 12. longitudinal steel bars; 13. annular steel bars; 14. a tie bar; 15. a waterproof gate; 16. a steel sleeve.
Detailed Description
The invention is further described below in connection with specific embodiments and the accompanying drawings.
Example 1
A chamber structure in a slope expansion period is mainly used for sealing a slope when sudden water passage occurs when the slope of an underground mine is expanded, so that excessive harm to the external structure of the slope and workers caused by floods is avoided, and the concrete structure and the working principle of the chamber structure are described in detail below.
As shown in fig. 1 to 6, the chamber structure mainly comprises surrounding rock 1, a ramp 2, a chamber wall 3, steel rails 5, anchor rods 6, a drainage pipeline 7 and a ventilation pipeline 10. Wherein the surrounding rock 1 belongs to the natural environment around the ramp 2, and the ramp 2 is formed by digging in the surrounding rock. The chamber wall body 3 is arranged in the ramp 2 and extends along the length direction of the ramp 2, and the outer side surface of the chamber wall body is fixedly connected with the surrounding rock 1 to form a sealing structure. The chamber wall 3 is internally provided with a chamber channel 4 for transportation, the inner side end of the chamber channel 4 is communicated with the inside of the ramp 2, the outer side end of the chamber channel 4 is communicated with the outside of the ramp 2, and the inner side end of the chamber channel 4 is provided with a waterproof gate 15 for sealing the chamber channel 4. In the embodiment, the chamber wall 3 is arranged at a position which is not less than 50m away from the tunneling head, namely the preset digging end of the ramp 2, the length of the chamber wall is not less than 7m, the thicknesses of the side part and the upper part are not less than 600mm, the thickness of the lower part is not less than 300mm, and the grade of the adopted concrete is not less than C35; the width of the chamber channel 4 is not less than 2800mm, the height is not less than 2600mm, and the length is consistent with the chamber wall 3.
The steel rail 5 and the anchor rod 6 are all components which are arranged on the chamber wall body 3 and are anchored into the surrounding rock 1 for reinforcing the connection strength of the chamber wall body 3 and the surrounding rock 1, but the actual structure of the steel rail and the anchor rod is greatly different, so that the actual construction process of the steel rail and the anchor rod is different, and the fact that the steel rail and the anchor rod are named is obvious. Specifically, at least 4 groups of steel rails 5 are arranged on the chamber wall body 3 along the length direction, each group of steel rails 5 has at least 8 steel rails, the anchoring length of each steel rail 5 into the surrounding rock 1 is not less than 1000mm, and the extending length of each steel rail 5 into the chamber wall body 3 is not less than 500mm. At least 8 groups of anchor rods 6 are arranged on the chamber wall body 3 along the length direction, each group is not less than 8, the diameter of each anchor rod 6 is not less than 22mm, the length is not less than 2250mm, and the embodiment adopts high-performance screw-thread steel resin anchor rods. By arranging the heavy steel rail 5, the underground chamber can have higher impact resistance capacity even without adopting a wedge-shaped wall structure, thereby replacing the existing wedge-shaped underground chamber wall structure, reducing the construction quantity and the construction strength and lowering the construction cost. Therefore, the outer side surface of the chamber wall 3 in direct contact with surrounding rock is an arch structure which is easier to excavate and cast.
However, during construction of the chamber in the ramp 2, air circulation and accumulated water discharge in the ramp 2 are also required to be ensured, and normal extension excavation of the ramp 2 is ensured to be stably and continuously carried out. Whereas in the existing underlying chamber structure the ventilation and drainage pipe sections would be located in the chamber channel 4 or additional separate channels could be dug in the surrounding rock 1. When the water gate 15 is arranged in the chamber channel 4, the transportation work is influenced, and the overall sealing performance of the chamber is influenced when the water gate 15 is closed; the additional individual channels are dug in the surrounding rock 1, so that the construction amount is increased, the overall shock resistance and shearing resistance of the chamber structure are reduced, and the waterproof capability is reduced.
In view of the above, the arrangement of the ventilation duct 10 and the drainage duct 7 of the present embodiment is as follows. The bottom both sides of chamber wall body 3 have offered respectively one along the recess of the length direction extension of ramp 7, and drainage pipe 7 sets up in the recess, and the recess passes through cast concrete and chamber wall body 3 integrated into one piece, and bulk strength is higher. The inner end and the outer end of the drainage pipeline 7 are respectively communicated with the inside and the outside of the ramp 2, specifically, the bottom of the ramp 2 at the inner side end of the drainage pipeline is provided with a sedimentation tank 9, the bottom of the ramp 2 at the outer side end of the drainage pipeline is provided with a drainage ditch 8, and the inner end and the outer end of the drainage pipeline 7 are respectively communicated with the sedimentation tank 9 and the drainage ditch 8. After accumulated water in the ramp 2 is accumulated to a certain depth in the sedimentation tank 9, the accumulated water can be discharged to the drainage ditch 8 through the drainage pipeline 7, so that accumulated water in the ramp 2 is avoided. In order to control the operation of the drainage pipeline 7, a large amount of water is prevented from being sprayed out of the drainage pipeline 7 when water is suddenly generated, in this embodiment, a high-pressure valve 11 for controlling the opening and closing of the drainage pipeline 7 is arranged at the part of the outer side end of the drainage pipeline 7 extending out of the chamber wall 3, the high-pressure valve 11 can be closed firstly when water is suddenly generated, and then the high-pressure valve 11 is slowly opened for draining water when water is drained. In the embodiment, the length of the drainage pipeline 7 is that the front section and the rear section are respectively lengthened by 2000mm on the basis of the length of the chamber channel 4, the diameter is not smaller than 300mm, and the high-pressure valve 11 bears the same pressure as the waterproof gate 15.
The ventilation pipeline 10 is arranged at the upper part of the chamber wall 3 along the length direction of the chamber wall 3, the inner side end part of the ventilation pipeline is provided with a soft air cylinder communicated with the inside of the ramp 2, and the outer side end part of the ventilation pipeline is provided with a soft air cylinder connected with an external fan. In this embodiment, two ventilation pipes 10 are symmetrically arranged on the upper portion of the chamber wall 3 along the middle portion of the wide edge of the chamber wall 3, and the two ventilation pipes 10 are respectively connected with a fan, and the fans can respectively adopt two blowers to send fresh air into the inclined ramp 2 at the same time according to actual working conditions, or adopt a form that one blower sends fresh air and the other exhaust fan pumps dirty air, so that air circulation of the inclined ramp is accelerated, and air purification effect is improved. The end part of the inner side of the ventilation pipeline 10 connected with the soft wind cylinder is provided with a waterproof cover plate, so that the ventilation pipeline has better waterproof capability and can prolong the service life of the ventilation pipeline 10. The ventilation pipeline 10 is arranged on the upper part of the chamber wall 3, so that the influence of transportation work of the chamber channel 4 is avoided, the tightness of the chamber structure can be ensured when the chamber wall 3 is formed by concrete casting, a perfect water-resistant sealing structure is formed, and the impact resistance and the water-proof capability of the chamber structure are not reduced. In this embodiment, the ventilation duct 10 is made of rigid material, and its length is 1000mm longer at the front and rear ends based on the length of the chamber channel 4, the diameter is not less than 800mm, and the thickness of the air duct is not less than 6mm.
And from the whole of chamber structure, it is through setting up reinforced concrete chamber in stable country rock 1, upper portion sets up air pipe 10 in the concrete chamber, the bottom sets up drain pipe 7 structure, set up waterproof gate 15 at the inboard end of chamber passageway 4, set up dryer waterproof cover plate at air pipe 10's inboard end, set up high-pressure valve 11 at drain pipe 7's outside end, can form the holistic airtight shock resistance of chamber, ensure that the ramp tunneling in-process can prevent and control big burst gush water, can not influence the normal tunneling of ramp simultaneously, ensure the safety of ramp tunneling in-process. Therefore, compared with the traditional wedge-shaped chamber wall, the outer side face of the chamber wall 3 can be set to be an arch structure which is easier to construct, the structure is simple and reliable, and the construction cost is greatly reduced.
It should be noted that, the strength of the chamber wall 3 is also very important for improving the overall shear resistance and impact resistance of the chamber structure, but the strength of the chamber wall 3 is greatly improved by arranging a unique reinforcing steel bar structure in the chamber wall 3, and meanwhile, the construction is more convenient when the wall is cast and molded. Specifically, the lower part of the chamber wall 3 is provided with lower transverse steel bars along the width direction of the chamber wall 3, the longitudinal steel bars 12 are arranged along the length direction of the chamber wall 3, the annular steel bars 13 which are arranged in a crossing manner with the longitudinal steel bars 12 and the lower transverse steel bars are arranged along the circumference of the chamber wall, and the longitudinal steel bars 12 and the annular steel bars 13 are connected through tie bars 14. Meanwhile, steel sleeves 16 extending along the length direction of the chamber wall 3 are symmetrically arranged on two sides of the chamber wall. By the steel bar structure and the steel sleeve 16, the integral strength of the chamber wall 3 is effectively improved, and the integral stability and the shock resistance of the chamber structure are enhanced.
It should be noted that the waterproof gate 15 of this embodiment has two pieces, and the two waterproof gates 15 are respectively hinged to two opposite sides of the inner side end of the chamber channel 4 and can rotate along the hinge point. When the two waterproof gates 15 rotate towards the middle of the chamber channel 4, the contact positions of the two waterproof gates 15 can be sealed and spliced together to seal the chamber channel 4 and prevent water from flowing into the chamber channel 4. The traditional single door has great importance, inconvenient installation and slow closing, and is difficult to quickly close the chamber channel 4 when sudden water passing occurs. The waterproof gate 15 of this embodiment replaces the conventional single-leaf door structure, so that the weight of each door is greatly reduced, the transportation and the installation are convenient, the chamber channel 4 can be rapidly closed when flood occurs, and the safety performance is greatly improved.
In summary, the chamber structure in the slope expansion period of the embodiment replaces the wedge-shaped wall structure adopted by the conventional waterproof gate chamber, and has better shearing resistance and friction resistance and excellent waterproof capability on the basis of reducing construction quantity, construction strength and construction cost.
Example 2
A chamber construction method in a slope ramp extension period comprises the following steps:
s1, designing a ramp barren section line and a net section line in a chamber when the ramp 2 is excavated, and drilling, charging, blasting and gangue discharging in the stable surrounding rock 1 according to the designed ramp barren section line position to excavate the ramp barren section line.
S2, selecting a chamber position, installing a steel rail 5 and an anchor rod 6 on the surface of surrounding rock 1 at the selected chamber position, arranging grooves for installing a drainage pipeline 7 on two sides of the bottom of the ramp 2, installing the drainage pipeline 7 in the grooves, tightly closing the grooves through casting concrete, and extending out part of the casting concrete from the inner end and the outer end of the drainage pipeline 7.
And S3, installing a water-proof gate 15 frame, paving transverse steel bars at the lower part of the chamber, and casting concrete at the lower part of the chamber.
S4, binding longitudinal steel bars 12, annular steel bars 13 and tie bars 14 on two sides of the chamber, installing steel sleeves 16 on two sides, supporting wall templates on two sides, casting concrete, and coating steel rails 5, anchor rods 6 and steel bars on the chamber wall 3 on two sides by the concrete.
S5, installing a ventilating duct 10 at the upper part of the chamber.
S6, binding longitudinal steel bars 12, annular steel bars 13 and tie bars 14 on the upper portion of the chamber, supporting an upper wall form, casting concrete, and covering the steel rail 5, the anchor rods 6 and the steel bars by the concrete to form an upper chamber wall 3. At this time, the lower part, the two sides and the upper part form an arch-shaped chamber wall body 3 which is connected with the surrounding rock 1 in a sealing way, and the inner side of the chamber wall body 3 forms a chamber channel 4.
And S7, installing a waterproof gate 15 on the door frame of the waterproof gate 15, wherein the door frame of the waterproof gate 15 is positioned at the inner side end part of the chamber channel 4.
And S8, installing a high-pressure valve 11 at the part of the outer side end of the drainage pipeline 7 extending out of the chamber wall body 3.
And S9, connecting the outer end of the ventilation pipeline 10 with a fan.
The chamber construction method can construct the chamber structure with higher strength, better waterproof capability and ventilation capability in the embodiment 1, and the whole process construction is convenient and the construction cost is lower.
The examples of the present invention are merely for describing the preferred embodiments of the present invention, and are not intended to limit the spirit and scope of the present invention, and those skilled in the art should make various changes and modifications to the technical solution of the present invention without departing from the spirit of the present invention.

Claims (10)

1. The utility model provides a chamber structure of ramp extension period, includes country rock (1), country rock (1) has ramp (2), be equipped with in ramp (2) along the chamber wall body (3) of the length direction extension of ramp (2), chamber wall body (3) and country rock (1) fixed connection are equipped with chamber passageway (4) in chamber wall body (3), and waterproof gate (15) are equipped with to the inboard tip of chamber passageway (4), its characterized in that: the outer side surface of the chamber wall body (3) is of an arch structure, and steel rails (5) anchored into surrounding rocks (1) are arranged in the arch structure;
the chamber structure is established by the following steps:
s1, digging a slope (2) in surrounding rock (1);
s2, selecting a chamber position, installing a steel rail (5) and an anchor rod (6) on the surface of surrounding rock (1), installing a drainage pipeline (7) at the bottom of a ramp (2), and casting concrete;
s3, installing a water-proof gate (15) door frame, and casting concrete at the lower part of the chamber;
s4, binding longitudinal steel bars (12), annular steel bars (13) and tie bars (14) on two sides of the chamber, supporting wall templates on two sides and casting concrete;
s5, installing a ventilating duct (10) at the upper part of the chamber;
s6, binding longitudinal steel bars (12), annular steel bars (13) and tie bars (14) at the upper part of the chamber, supporting an upper wall form and casting concrete;
s7, installing a waterproof gate (15) on a door frame of the waterproof gate (15);
s8, installing a high-pressure valve (11) at the part of the outer side end of the drainage pipeline (7) extending out of the chamber wall body (3);
s9, enabling the outer end of the ventilation pipeline (10) to be connected with a fan.
2. A chamber structure for a ramp extension period as defined in claim 1, wherein: a plurality of groups of steel rails (5) are arranged on the chamber wall (3) along the length direction of the chamber wall, and each group of steel rails (5) has at least 8 steel rails; the length of each steel rail (5) anchored into the surrounding rock (1) is not less than 1000mm, and the length of each steel rail extending into the chamber wall (3) is not less than 500mm.
3. A chamber structure for a ramp extension period as defined in claim 2, wherein: and a plurality of groups of anchor rods (6) anchored into the surrounding rock (1) are arranged on the chamber wall body (3) along the length direction of the chamber wall body.
4. A chamber structure for a ramp extension period as defined in claim 1, wherein: a drainage pipeline (7) is arranged at the bottom of the chamber wall body (3); the outer side end of the drainage pipeline (7) is connected with a drainage ditch (8), and a sedimentation tank (9) is arranged at the bottom of the inclined ramp (2) at the inner side end of the drainage pipeline.
5. A chamber structure for a ramp extension period as defined in claim 4 wherein: the part of the outer side end of the drainage pipeline (7) extending out of the chamber wall body (3) is provided with a high-pressure valve (11).
6. A chamber structure for a ramp extension period as defined in claim 5, wherein: the upper part of the chamber wall body (3) is provided with a ventilation pipeline (10); the inner side end of the ventilating duct (10) is communicated with the inside of the inclined ramp (2), and the outer side end of the ventilating duct is connected with a fan.
7. A chamber structure during a ramp extension period according to any one of claims 1-6, wherein: longitudinal steel bars (12) are arranged in the chamber wall body (3) along the length direction of the chamber wall body, annular steel bars (13) which are arranged in a crossing mode with the longitudinal steel bars (12) are arranged along the circumferential direction of the chamber wall body, and the longitudinal steel bars (12) and the annular steel bars (13) are connected through tie bars (14).
8. A chamber structure during a ramp extension period according to any one of claims 1-6, wherein: the waterproof gate (15) is provided with two wings, and the two wings of the waterproof gate (15) are respectively hinged with two sides of the inner side end part of the chamber channel (4) and can seal the chamber channel (4).
9. A chamber structure during a ramp extension period according to any one of claims 1-6, wherein: a steel sleeve (16) is arranged in the chamber wall (3) along the length direction of the chamber wall.
10. A method of constructing a chamber structure in a ramp extension period as claimed in any one of claims 1 to 9, comprising the steps of:
s1, digging a slope (2) in surrounding rock (1);
s2, selecting a chamber position, installing a steel rail (5) and an anchor rod (6) on the surface of surrounding rock (1), installing a drainage pipeline (7) at the bottom of a ramp (2), and casting concrete;
s3, installing a water-proof gate (15) door frame, and casting concrete at the lower part of the chamber;
s4, binding longitudinal steel bars (12), annular steel bars (13) and tie bars (14) on two sides of the chamber, supporting wall templates on two sides and casting concrete;
s5, installing a ventilating duct (10) at the upper part of the chamber;
s6, binding longitudinal steel bars (12), annular steel bars (13) and tie bars (14) at the upper part of the chamber, supporting an upper wall form and casting concrete;
s7, installing a waterproof gate (15) on a door frame of the waterproof gate (15);
s8, installing a high-pressure valve (11) at the part of the outer side end of the drainage pipeline (7) extending out of the chamber wall body (3);
s9, enabling the outer end of the ventilation pipeline (10) to be connected with a fan.
CN202110361355.3A 2021-04-02 2021-04-02 Chamber structure in slope ramp extension period and construction method Active CN112879051B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101349163A (en) * 2008-09-13 2009-01-21 温毅 Mine down-hole circular arc arched splitting upper turn-over type water protecting gate
CN102937024A (en) * 2012-11-13 2013-02-20 金诚信矿业管理股份有限公司 Digging and building method for water-proof gate chamber
CN108590696A (en) * 2018-07-01 2018-09-28 沈阳建筑大学 A kind of the traffic tunnel structure and fire-fighting evacuation system of the circular liner of boring construction
CN109322702A (en) * 2018-10-19 2019-02-12 中冶北方(大连)工程技术有限公司 A kind of mine down-hole waterproof lock room gutter antipriming
CN110486074A (en) * 2019-09-11 2019-11-22 中铁隧道局集团有限公司 A kind of the stringing design method and construction method of major long tunnel construction ventilation
CN111173563A (en) * 2020-03-04 2020-05-19 中铁第六勘察设计院集团有限公司 Merging structure in tunnel drainage system and construction method
CN112195883A (en) * 2020-07-02 2021-01-08 中国电建集团华东勘测设计研究院有限公司 Arrangement structure and construction method of pressure pipeline and drainage gallery suitable for TBM construction

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101349163A (en) * 2008-09-13 2009-01-21 温毅 Mine down-hole circular arc arched splitting upper turn-over type water protecting gate
CN102937024A (en) * 2012-11-13 2013-02-20 金诚信矿业管理股份有限公司 Digging and building method for water-proof gate chamber
CN108590696A (en) * 2018-07-01 2018-09-28 沈阳建筑大学 A kind of the traffic tunnel structure and fire-fighting evacuation system of the circular liner of boring construction
CN109322702A (en) * 2018-10-19 2019-02-12 中冶北方(大连)工程技术有限公司 A kind of mine down-hole waterproof lock room gutter antipriming
CN110486074A (en) * 2019-09-11 2019-11-22 中铁隧道局集团有限公司 A kind of the stringing design method and construction method of major long tunnel construction ventilation
CN111173563A (en) * 2020-03-04 2020-05-19 中铁第六勘察设计院集团有限公司 Merging structure in tunnel drainage system and construction method
CN112195883A (en) * 2020-07-02 2021-01-08 中国电建集团华东勘测设计研究院有限公司 Arrangement structure and construction method of pressure pipeline and drainage gallery suitable for TBM construction

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