CN105673040A - Bearing system of deep well high-stress roadway surrounding rock enhanced support and application of bearing system - Google Patents

Bearing system of deep well high-stress roadway surrounding rock enhanced support and application of bearing system Download PDF

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Publication number
CN105673040A
CN105673040A CN201610137894.8A CN201610137894A CN105673040A CN 105673040 A CN105673040 A CN 105673040A CN 201610137894 A CN201610137894 A CN 201610137894A CN 105673040 A CN105673040 A CN 105673040A
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CN
China
Prior art keywords
concrete
enhanced support
support structure
bearing system
steel pipe
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Pending
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CN201610137894.8A
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Chinese (zh)
Inventor
赵光明
赵彦
孟祥瑞
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Anhui University of Science and Technology
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Anhui University of Science and Technology
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Priority to CN201610137894.8A priority Critical patent/CN105673040A/en
Publication of CN105673040A publication Critical patent/CN105673040A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH 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
    • E21D11/006Lining anchored in the rock
    • EFIXED CONSTRUCTIONS
    • E21EARTH 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

Abstract

The invention discloses a bearing system of a deep well high-stress roadway surrounding rock enhanced support and application of the bearing system, and belongs to the field of underground engineering surrounding rock supports. The bearing system comprises a concrete-filled steel tube enhanced support structure, a concrete spray layer reinforced support structure, an anchor rod reinforced support structure, a grouting enhanced and reinforced structure and a reinforced concrete lining enhanced support structure. The concrete-filled steel tube enhanced support structure is composed of a steel tube concrete support and concrete. The steel tube concrete support comprises multiple sections of seamless steel tubes and head sleeving pipes. The steel pipes are connected in a butt joint mode to form annular structures through the head sleeving pipes. The radians of the steel tubes are the same. The steel tubes are filled with concrete. Elastic soft cushions are arranged in the middles of the head sleeving pipes. Elastic soft cushions are hollow. Grouting holes are formed in the side tube walls of the steel tubes. Exhaust holes are formed in the upper tube walls of the steel tubes. Concrete is injected into the steel tubes through the grouting holes, and the concrete-filled steel tube enhanced support structure is formed. The bearing system is wide in application range, capable of providing high support counter force for roadway surrounding rock so that roadway surrounding rock can be stable, and convenient to install and use.

Description

Bearing system of deep-well high stress tunnel country rock Enhanced support and application thereof
Technical field
The present invention relates to bearing system, be specifically related to bearing system of deep-well high stress tunnel country rock Enhanced support and application thereof, belong to underground engineering wall rock supporting field.
Background technology
Along with the increase year by year of coal resources in China digging amount, the coal resources of superficial part are day by day exhausted, have started to the coal resources in exploitation deep at present, and deep mining is in the speed increment with 8-12m/a (rice/year). Wherein, the mine of east mining area then develops with the speed of 10-25m/a. China has exploited the coal resources to 1000-1500m in existing many collieries, and under the high stress environment of deep, deformation of the surrounding rock in tunnel destroys the feature embodying soft-rock tunnel: roadway deformation amount is big, supporting difficulty.
Meanwhile, newly pick tunnel course is more than 6000km every year in China, and Deep Soft Rock Tunnel ratio accounts for more than 10%, and more than 30 mining area faces a soft rock roadway support difficult problem. Need to expend huge human and material resources every year, tunnel is reprocessed and safeguards by financial resources, have impact on manufacturing schedule and safety; Even indivedual mines occurred owing to country rock of soft rock roadway deflection is big and deformation is fast, behind tunnelling machine pick lane, country rock produces convergent deformation immediately, the situation that development machine cannot exit, tunnel cannot be tunneled, cause that mine stops production or suspends, cause tremendous economic loss, bring grave danger to mine safety simultaneously.
Although the Support Technology in Soft Rock Roadway of China such as stone cornering arch, shotcrete, Bolt net and jet, anchor cable, grouting and reinforcing, armored concrete, steelframe etc. are made that very big contribution for soft rock roadway support engineering, but it is big and complicated still to show roadway surrounding rock stress, deflection is big, it is difficult to the defect effectively controlled.
Summary of the invention
For above-mentioned prior art Problems existing, the present invention provides the bearing system of a kind of deep-well high stress tunnel country rock Enhanced support, and this bearing system bearing capacity is strong, and adaptability is good, and stability is strong, and easy for installation. It addition, present invention also offers the purposes of above-mentioned bearing system.
To achieve these goals, the bearing system of the deep-well high stress tunnel country rock Enhanced support that the present invention adopts, builds arch Enhanced support structure including concrete filled steel tube Enhanced support structure, concrete spray coating Enhanced support structure, anchor pole Enhanced support structure, slip casting strengthening ruggedized construction and armored concrete;
Described concrete filled steel tube Enhanced support structure is made up of steel pipe concrete bracket and concrete, described steel pipe concrete bracket includes more piece seamless steel pipe and set head tube, described more piece seamless steel pipe forms circulus by overlapping head tube docking, the radian of each steel pipe is identical, steel duct fill concrete, it is provided with elastic cushion in the middle of described set head tube, it is logical in the middle of described elastic cushion, the side pipe wall of steel pipe is provided with injected hole, upper tube wall is provided with steam vent, concrete injects steel duct by injected hole, forms concrete filled steel tube Enhanced support structure;
Described anchor pole Enhanced support structure is end anchorage or full length fastening;
Described armored concrete is built arch Enhanced support structure and is included building arch structure, wire netting, plastic foamboard, described block arch structure includes building arch concrete, described block arch concrete adopts Portland cement and water 0.4-0.6 proportioning in proportion, and mix gross weight 4% accelerator, described wire netting be tunneling boring lay bar-mat reinforcement.
As improvement, the concrete in described concrete filled steel tube Enhanced support structure, adopt steel fiber reinforced concrete or expansive concrete;
Or adopt anhydrite, polyurethane, and add coagulator.
As improvement, inside the skene arch of the steel pipe concrete bracket in described concrete filled steel tube Enhanced support structure, it is welded with round steel and steel plate.
As improvement, the caliber of described steel pipe is all identical, and steel pipe has 4-6 joint.
As improvement, described pullover bore is more than outer diameter of steel pipes.
As improvement, the wall thickness of described set head tube is more than thickness of steel pipe.
As improvement, the steel pipe concrete bracket in described concrete filled steel tube Enhanced support structure is connected by multiple push rods, and described push rod is steel core concrete column.
It addition, present invention also offers the purposes of above-mentioned deep-well high stress tunnel country rock Enhanced support bearing system, adopt supporting construction compound uses different in bearing system for different rock properties,
When country rock hardness is middle hard wall-rock, now Enhanced support bearing system includes concrete spray coating Enhanced support structure, anchor pole Enhanced support structure;
When country rock hardness is weak surrounding rock, now Enhanced support bearing system includes anchor pole Enhanced support structure, concrete filled steel tube Enhanced support structure;
When country rock hardness is pole weak surrounding rock, now Enhanced support bearing system includes concrete filled steel tube Enhanced support structure, arch Enhanced support structure built by armored concrete.
As improvement, when country rock hardness is middle hard wall-rock, Enhanced support bearing system also includes slip casting strengthening ruggedized construction.
Compared with prior art, the bearing system of deep-well high stress tunnel country rock Enhanced support provided by the invention, it it is the compound of multiple structure, wherein concrete filled steel tube Enhanced support structure is core, adopting different structure composites for different country rock feature, specific aim is higher, is applied in that deep-well, soft rock, dynamic pressure and area of stress concentration etc. are heavily stressed and in the roadway support of complex stress, high supporting reaction can be provided so that roadway surrounding rock is stable to roadway surrounding rock, easy to install.
Accompanying drawing explanation
Fig. 1 is the bearing system section structure schematic diagram of a kind of deep-well high stress tunnel country rock Enhanced support of the present invention;
Fig. 2 is the steel pipe concrete bracket attachment structure schematic diagram of the present invention;
Fig. 3 is the steel pipe concrete bracket structural representation of the present invention;
Fig. 4 is the present invention Enhanced support bearing system section structure schematic diagram for middle hard wall-rock;
Fig. 5 is the present invention slip casting Enhanced support bearing system section structure schematic diagram for middle hard wall-rock;
Fig. 6 is the present invention Enhanced support bearing system section structure schematic diagram for weak surrounding rock;
Fig. 7 is the present invention Enhanced support bearing system section structure schematic diagram for pole weak surrounding rock;
In figure: 1, concrete filled steel tube Enhanced support structure, 2, concrete spray coating Enhanced support structure 3, anchor pole Enhanced support structure, 4, surrounding rock structure, 5, push rod, 6, steam vent, 7, injected hole, 8, steel pipe, 9, set head tube, 10, elastic cushion, 11, slip casting strengthening ruggedized construction, 12, armored concrete build arch Enhanced support structure.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below by drawings and Examples, the present invention is further elaborated. However, it should be understood that specific embodiment described herein is only in order to explain the present invention, it is not limited to the scope of the present invention.
As shown in Fig. 1-Fig. 7, the bearing system of deep-well high stress tunnel country rock Enhanced support, builds arch Enhanced support structure 12 including concrete filled steel tube Enhanced support structure 1, concrete spray coating Enhanced support structure 2, anchor pole Enhanced support structure 3, slip casting strengthening ruggedized construction 11 and armored concrete;
As shown in Figure 3, described concrete filled steel tube Enhanced support structure 1 is made up of steel pipe concrete bracket and concrete, described steel pipe concrete bracket includes more piece seamless steel pipe 8 and set head tube 9, described more piece seamless steel pipe 8 forms circulus by overlapping head tube 9 docking, the radian of each steel pipe 8 is identical, the internal fill concrete of steel pipe 8, it is provided with elastic cushion 10 in the middle of described set head tube 9, it is logical in the middle of described elastic cushion 10, the side pipe wall of steel pipe 8 is provided with injected hole 7, upper tube wall is provided with steam vent 6, it is internal that concrete injects steel pipe 8 by injected hole 7, form concrete filled steel tube Enhanced support structure 1,
Described anchor pole Enhanced support structure 3 is divided into end anchorage and full length fastening according to anchor rod anchored length difference;
Described armored concrete is built arch Enhanced support structure 12 and is included building arch structure, wire netting, plastic foamboard, described block arch structure includes building arch concrete, described block arch concrete adopts Portland cement and water 0.4-0.6 proportioning in proportion, and mix gross weight 4% accelerator, described wire netting be tunneling boring lay bar-mat reinforcement; Described plastic foamboard is mainly used in exclusion of water and weathering.
As the improvement of embodiment, the concrete in described concrete filled steel tube Enhanced support structure 1, adopt steel fiber reinforced concrete or similar expansive concrete;
Adopt such as anhydrite, polyurethane or other construction materials also dependent on needs, and add coagulator.
As the improvement of embodiment, it is welded with round steel and steel plate inside the skene arch of the steel pipe concrete bracket in described concrete filled steel tube Enhanced support structure 1, improves integrally-built intensity and steadiness.
As the improvement of embodiment, the caliber of described steel pipe 8 is all identical, and steel pipe 8 has 4-6 joint, easy to install, reasonable in design.
As the improvement of embodiment, described set head tube 9 internal diameter is more than steel pipe 8 external diameter, and when steel pipe 8 is docked formation circulus by overlapping head tube 9, more convenient operation, the wall thickness of described set head tube 9 is more than steel pipe 8 wall thickness, and structural strength is high, good stability.
As the improvement of embodiment, as in figure 2 it is shown, the steel pipe concrete bracket in described concrete filled steel tube Enhanced support structure 1 is connected by multiple push rods 5, described push rod 5 is steel core concrete column.
It addition, present invention also offers the purposes of any of the above-described item described deep-well high stress tunnel country rock Enhanced support bearing system, adopt supporting construction compound uses different in bearing system for different rock properties,
When country rock hardness is middle hard wall-rock, as shown in Figure 4, now Enhanced support bearing system includes concrete spray coating Enhanced support structure 2, anchor pole Enhanced support structure 3, wherein concrete spray coating Enhanced support structure 2 is arranged on surrounding rock structure 4, and the anchor pole in anchor pole Enhanced support structure 3 adopts end anchorage and full length fastening to be arranged on surrounding rock structure 4;
When country rock hardness is weak surrounding rock, as shown in Figure 6, now Enhanced support bearing system includes anchor pole Enhanced support structure (needing slip casting), concrete filled steel tube Enhanced support structure 1, wherein concrete filled steel tube Enhanced support structure 1 is arranged on inside surrounding rock structure 4, and the anchor pole in anchor pole Enhanced support structure adopts end anchorage and full length fastening to be arranged on surrounding rock structure 4;
When country rock hardness is pole weak surrounding rock, as shown in Figure 7, now Enhanced support bearing system includes concrete filled steel tube Enhanced support structure 1, arch Enhanced support structure 12 built by armored concrete, described concrete filled steel tube Enhanced support structure 1 is arranged on armored concrete and builds inside arch Enhanced support structure 12, and described armored concrete is built arch Enhanced support structure 12 and is arranged on inside surrounding rock structure 4.
Further improvement as embodiment, when country rock hardness is middle hard wall-rock, Enhanced support bearing system also includes slip casting strengthening ruggedized construction 11, as it is shown in figure 5, wherein slip casting strengthening ruggedized construction 11 is to form one layer of slip casting reinforced structure on surrounding rock structure 4 by slip casting.
The present invention is directed to pole weak surrounding rock, middle hard wall-rock and weak surrounding rock and take detailed description of the invention, most important of which link is being embodied as of concrete filled steel tube Enhanced support structure 1, other links are all conventional implementation, introduce the technological process of concrete filled steel tube Enhanced support structure here.
In the present invention, the technological process of roadway support construction is:
Excavation drift section; Top board arranges that anchor pole is as gib; Empty steel pipe support is installed; Bar-mat reinforcement, plastic foamboard is laid between support and country rock; Between support and country rock, pneumatically placed concrete builds arch; 10-20 frame steel pipe support concrete perfusion.
Concretely comprise the following steps,
1) empty steel pipe concrete bracket sequence of construction and method:
After tunnelling 5-8m, tunnel is cleared up, remove base plate slag stone;
With center line in roadway for benchmark, it is that 0.8m determines backing positions by set spacing, first passes through anchor pole and top segmental arc steel pipe is fixed to precalculated position;
Next puts into end arch section, and the end arch section of support is connected by push rod 5 with the last period, installs set head tube 9;
Two sections of side are finally installed, side lower limb section are slowly inserted in set head tube 9;
Top segmental arc is loosened so that it is port alignment slowly inserts after helping the spacer bar in section, until port is combined closely, then the set head tube 9 being enclosed within top segmental arc in advance is moved down into baffle ring, and push rod 5 is installed between previous frame support;
Being fixed by beating anchor pole at anchoring basal part of the ear place by support, every ten frame steel pipe supports anchor a frame.
2) after empty steel pipe support installation, between steel pipe concrete bracket and roadway surrounding rock, lay bar-mat reinforcement, plastic foamboard, then to the space gunite concrete arch between steel pipe concrete bracket and roadway surrounding rock, spray arch thickness 300mm.
3) steel pipe concrete bracket concrete perfusion technique:
The built on stilts steel pipe support concrete perfusion of 10-20 is often installed once;
Wherein, pouring construction order,
Concrete pump lies in tunnel, is connected with support slip casting short tube by high-pressure rubber pipe;
Connect cable, arrange water pipe, delivery pump zero load 15-20min;
Mixing concrete, each stir about 1m3;
Connect grouting pipeline and be followed successively by delivery pump-conveying pipe-high-pressure rubber pipe-gate valve-support grouting port;
First time uses and should first pump a tank cement mortar with lubricating pipe during delivery pump, then normally pumps slip casting; First in steel pipe, put into a small amount of water before support concrete perfusion, play lubrication; Each slip casting connects the transfer pipeline of five frame supports in advance, to facilitate pipeline to connect, saves the time, it is prevented that conveying pipe inner concrete solidification.
The perfusion of every frame terminates, and flows out about 5kg concrete using plasma discharge hole, top as mark.
The perfusion of every frame support first stops pumping after terminating, and is then shut off gate valve, detaching pipelines, and closure row is by hole. Connect next frame, continue perfusion, until all perfusion is complete.
After perfusion, first termination of pumping, lays down agitator tank any excess concrete, positive and negative pump washing pipeline, delivery pump pipeline, and detaching pipelines stops supplying water, last power-off.
Empty support is installed and filling concrete construction is synchronously performed with pneumatically placed concrete arch body, ultimately forms the Enhanced support carrying structure of an overall pole weak surrounding rock.
For middle hard wall-rock and weak surrounding rock, operating principle is identical.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement or improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.

Claims (9)

1. the bearing system of deep-well high stress tunnel country rock Enhanced support, it is characterized in that, build arch Enhanced support structure (12) including concrete filled steel tube Enhanced support structure (1), concrete spray coating Enhanced support structure (2), anchor pole Enhanced support structure (3), slip casting strengthening ruggedized construction (11) and armored concrete;
Described concrete filled steel tube Enhanced support structure (1) is made up of steel pipe concrete bracket and concrete, described steel pipe concrete bracket includes more piece seamless steel pipe (8) and set head tube (9), described more piece seamless steel pipe (8) forms circulus by overlapping head tube (9) docking, the radian of each steel pipe (8) is identical, the internal fill concrete of steel pipe (8), it is provided with elastic cushion (10) in the middle of described set head tube (9), it is logical in the middle of described elastic cushion (10), the side pipe wall of steel pipe (8) is provided with injected hole (7), upper tube wall is provided with steam vent (6), it is internal that concrete injects steel pipe (8) by injected hole (7), form concrete filled steel tube Enhanced support structure (1),
Described anchor pole Enhanced support structure (3) is end anchorage or full length fastening;
Described armored concrete is built arch Enhanced support structure (12) and is included building arch structure, wire netting, plastic foamboard, described block arch structure includes building arch concrete, described block arch concrete adopts Portland cement and water 0.4-0.6 proportioning in proportion, and mix gross weight 4% accelerator, described wire netting be tunneling boring lay bar-mat reinforcement.
2. the bearing system of deep-well high stress tunnel country rock Enhanced support according to claim 1, it is characterised in that the concrete in described concrete filled steel tube Enhanced support structure (1), adopts steel fiber reinforced concrete or expansive concrete;
Or adopt anhydrite, polyurethane, and add coagulator.
3. the bearing system of deep-well high stress tunnel country rock Enhanced support according to claim 1, it is characterised in that be welded with round steel and steel plate inside the skene arch of the steel pipe concrete bracket in described concrete filled steel tube Enhanced support structure (1).
4. the bearing system of deep-well high stress tunnel country rock Enhanced support according to claim 1, it is characterised in that the caliber of described steel pipe (8) is all identical, steel pipe (8) has 4-6 joint.
5. the bearing system of deep-well high stress tunnel country rock Enhanced support according to claim 4, it is characterised in that described set head tube (9) internal diameter is more than steel pipe (8) external diameter.
6. the bearing system of deep-well high stress tunnel country rock Enhanced support according to claim 5, it is characterised in that the wall thickness of described set head tube (9) is more than steel pipe (8) wall thickness.
7. the bearing system of deep-well high stress tunnel country rock Enhanced support according to claim 1, it is characterized in that, steel pipe concrete bracket in described concrete filled steel tube Enhanced support structure (1) is connected by multiple push rods (5), and described push rod (5) is steel core concrete column.
8. the purposes of deep-well high stress tunnel country rock Enhanced support bearing system as described in any one of claim 1-7, it is characterised in that adopt supporting construction compound uses different in bearing system for different rock properties,
When country rock hardness is middle hard wall-rock, now Enhanced support bearing system includes concrete spray coating Enhanced support structure (2), anchor pole Enhanced support structure (3);
When country rock hardness is weak surrounding rock, now Enhanced support bearing system includes anchor pole Enhanced support structure (3), concrete filled steel tube Enhanced support structure (1);
When country rock hardness is pole weak surrounding rock, now Enhanced support bearing system includes concrete filled steel tube Enhanced support structure (1), arch Enhanced support structure (12) built by armored concrete.
9. the purposes of deep-well high stress tunnel country rock Enhanced support bearing system according to claim 8, it is characterised in that when country rock hardness is middle hard wall-rock, Enhanced support bearing system also includes slip casting strengthening ruggedized construction (11).
CN201610137894.8A 2016-03-10 2016-03-10 Bearing system of deep well high-stress roadway surrounding rock enhanced support and application of bearing system Pending CN105673040A (en)

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CN106089247A (en) * 2016-07-06 2016-11-09 山东大学 A kind of tunnel grooved confined concrete preliminary bracing system and method
CN106194209A (en) * 2016-07-07 2016-12-07 中国石油天然气集团公司 A kind of steel pipe concrete bracket and construction method thereof
CN107060839A (en) * 2017-04-07 2017-08-18 中国水利水电第五工程局有限公司 Tunnel concrete liner Simple steel scaffold
CN107965341A (en) * 2017-12-01 2018-04-27 河南理工大学 A kind of large-section underground pipe canopy pipe network concrete support method
CN113137242A (en) * 2021-03-16 2021-07-20 中国人民解放军军事科学院国防工程研究院工程防护研究所 Assembled combined supporting structure for deep underground space tunnel

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CN106194209A (en) * 2016-07-07 2016-12-07 中国石油天然气集团公司 A kind of steel pipe concrete bracket and construction method thereof
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CN107965341A (en) * 2017-12-01 2018-04-27 河南理工大学 A kind of large-section underground pipe canopy pipe network concrete support method
CN113137242A (en) * 2021-03-16 2021-07-20 中国人民解放军军事科学院国防工程研究院工程防护研究所 Assembled combined supporting structure for deep underground space tunnel

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