WO2024139801A1 - Isolation protection system for safe operation of gas tunnel - Google Patents
Isolation protection system for safe operation of gas tunnel Download PDFInfo
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- WO2024139801A1 WO2024139801A1 PCT/CN2023/131562 CN2023131562W WO2024139801A1 WO 2024139801 A1 WO2024139801 A1 WO 2024139801A1 CN 2023131562 W CN2023131562 W CN 2023131562W WO 2024139801 A1 WO2024139801 A1 WO 2024139801A1
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- gas
- pipeline
- isolation
- water
- tunnel
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Definitions
- the present application relates to the technical field of gas tunnel construction, and in particular to a gas tunnel safe operation isolation and protection system.
- the main purpose of this application is to provide a safe operation isolation and protection system for a gas tunnel, aiming to solve the technical problem of related technologies that there are safety hazards in operating gas tunnels due to gas leakage and accumulation.
- the present application proposes a gas tunnel safe operation isolation protection system, wherein the gas tunnel includes an initial support layer formed in a geological body, and the gas tunnel safe operation isolation protection system includes:
- first isolation layer being formed in the geological body outside the initial support layer
- an isolation structure wherein the isolation structure is formed on the inner side of the initial support layer, a water vapor discharge space is formed between the isolation structure and the initial support layer, and the isolation structure can isolate gas in the water vapor discharge space;
- a second isolation layer is further provided between the isolation structure and the initial supporting layer, and the water vapor discharge space is formed between the second isolation layer and the initial supporting layer.
- a secondary lining layer wherein the secondary lining layer is composed of at least two lining rings connected in sequence along the excavation direction of the gas tunnel, each of the lining rings is formed by enclosing at least two lining blocks connected end to end along the circumference of the gas tunnel, and a construction joint is formed between any two adjacent lining rings and between any two adjacent lining blocks;
- a first water stop wherein the first water stop is arranged in the construction joint
- a second waterstop is provided corresponding to the construction joint and sandwiched between the secondary lining layer and the second isolation layer.
- a foam cushion layer is further provided between the second isolation layer and the initial support layer, and the foam cushion layer is filled in the water vapor discharge space.
- the water vapor discharge space includes a first space and a second space and a third space respectively connected to the first space, the first space is arranged corresponding to the waist of the gas tunnel, the second space is arranged corresponding to the vault of the gas tunnel, and the third space is arranged corresponding to the invert of the gas tunnel;
- the water-gas separation system comprises:
- a gas discharge pipeline the discharge pipeline being installed in the second space along the excavation direction of the gas tunnel;
- the water discharge pipeline being installed in the third space along the excavation direction of the gas tunnel;
- At least two pipeline separation mechanisms are installed in the first space at intervals along the excavation direction of the gas tunnel, and the top end of each pipeline separation mechanism is connected to the gas discharge pipeline, and the bottom end is connected to the water discharge pipeline.
- each of the pipeline separation mechanisms comprises:
- first pipeline wherein the first pipeline is arranged along the excavation direction of the gas tunnel;
- the leak-proof section is provided with a conduit, the bottom end of the conduit is connected to the leak-proof section, and the top end of the conduit is connected to the water discharge pipe.
- the top of the conduit is not lower than the connecting point between the third pipeline and the first pipeline.
- the radial width of the first isolation layer is at least 6 m.
- the technical solution of the present application forms a first isolation layer in the geological body outside the initial support layer, then forms an isolation structure on the inner side of the initial support layer, and forms a water vapor discharge space between the isolation structure and the first isolation layer, and then installs the water vapor separation system in the water vapor discharge space.
- the present application uses the first isolation layer to isolate the surplus gas in the geological body in the geological body, and uses the isolation structure to isolate the gas leaked into the water vapor discharge space in the area outside the water vapor discharge space, so that when the present application is implemented, it can prevent gas from leaking into the tunnel to affect the safe operation of the tunnel, and solves the safety hazard of the gas tunnel in operation due to gas leakage and accumulation in the related technology.
- the present application also solves the defect that the normal operation of the gas tunnel is affected by gas leakage and accumulation due to cracks or holes in the geological body and lining structure in the area where the gas tunnel is located.
- FIG1 is a schematic diagram of the structure of a gas tunnel geological structure according to an example of the present application.
- FIG2 is a schematic diagram of the reinforcement of the geological structure shown in FIG1;
- FIG3 is a schematic diagram of a planar structure of a reinforcement area according to an example of the present application.
- FIG4 is a schematic diagram of the structure of a gas tunnel safe operation isolation protection system according to an application example
- FIG5 is a schematic structural diagram of a cross section of a tunnel structure according to an example of the present application.
- FIG6 is a schematic structural diagram of an enlarged structure of portion E in FIG5 ;
- FIG8 is a schematic structural diagram of a water-gas separation system according to an example of the present application.
- the present application proposes a gas tunnel safe operation isolation and protection system.
- excavation construction is carried out on the heading face to be reinforced after the curtain grouting is completed, until the current tunnel section is formed after the heading face passes through the minimum clear distance of 10m from the coal seam, and radial grouting is performed on the to-be-formed area on the contour surface of the current tunnel section, so that the to-be-formed area is converted into the first isolation layer 200.
- the second isolation layer 310 of the example can be but is not limited to a gas isolation board, wherein the gas isolation board is made of existing glass fiber cloth and other materials. This application is only for application and does not involve the improvement or design of the structure of the example gas isolation board itself, which will not be elaborated here.
- a first water stop 331 is provided in the construction joint.
- the secondary lining layer 330 is formed by pouring concrete with an airtight agent added, so that the sealing performance of the entire secondary lining layer 330 can be improved during the specific implementation of the present application, thereby effectively preventing gas from leaking from the secondary lining layer 330 into the tunnel.
- a first pipeline 431, the first pipeline 431 is arranged along the excavation direction of the gas tunnel;
- the third pipeline 433, the top end of the third pipeline 433 is connected to the first pipeline 431, and the bottom end is connected to the water discharge pipeline 420.
- the third pipeline 433 is bent downward away from the first pipeline 431 to form a leak-proof section, and the height of the leak-proof section is lower than the connection point between the third pipeline 433 and the first pipeline 431.
- the first pipeline 431 is used for the water vapor mixture seeping out of the geological body 10 to pass through, so that the gas in the water vapor mixture is discharged to the gas discharge pipeline 410 through the second pipeline 432, and the liquid in the water vapor mixture is discharged to the water discharge pipeline 420 through the third pipeline 433. Water and gas can be discharged separately.
- the third pipeline 433 is bent downward away from the first pipeline 431 to form a leak-proof section, and the height of the leak-proof section is lower than the connection point between the third pipeline 433 and the first pipeline 431, so that the present application can prevent gas from flowing into the tunnel from the third pipeline 433 during specific implementation, causing pollution in the tunnel, and improving the safety performance of the tunnel during use.
- cracks in the tunnel surrounding rock there are also a large number of cracks in the tunnel surrounding rock; gas outburst prevention measures such as drainage drilling, hydraulic cutting or hydraulic fracturing form holes or cracks in the coal seam; the initial support construction system of the tunnel, anchor rods, locking anchor rods or advance support measures form holes in the surrounding rock; the gaps formed by the injection soil and the surrounding rock are not completely close together; cracks will also form in the rock mass due to the convergence deformation and settlement of the surrounding rock. These cracks or gaps are channels for gas to overflow into the tunnel.
- gas outburst control is to ensure that gas no longer outbursts during the tunnel construction stage, but during the tunnel opening and operation stage, under the action of gas pressure and concentration gradient difference, gas moves into the tunnel along cracks or holes, and may penetrate into the tunnel, posing a major safety hazard.
- the purpose of this application is to prevent gas from penetrating into the back of the lining through the surrounding rock columns and channels by grouting consolidation of the surrounding rock and coal seams; to block the small amount of gas that penetrates into the tunnel behind the secondary lining through the partition and discharge system set up in the tunnel support and lining system, and to drain the gas to the cave entrance through the exclusion pipe behind the lining to prevent it from penetrating into the tunnel, thereby ensuring safe operation in the gas tunnel.
- Grouting is performed on the surrounding rock and coal seam curtains within the range of 10m along the coal seam group and 10m away from the coal seam group, and within the range of 5-6m of the tunnel excavation contour line.
- Cement slurry is used to fill the surrounding rock cracks, gaps and holes formed due to gas treatment, and consolidate them into a whole, forming a barrier to isolate the gas outside the circle; after the completion of the tunnel support shotcrete construction, radial small pipe 434 grouting is used to close the cracks or holes formed in the rock body. Through two rounds of grouting, a circle of integral surrounding rock mass is formed within 6m behind the tunnel lining, isolating the gas from penetrating into the lining clearance.
- water vapor separation device In the initial support, water vapor separation device, gas discharge pipe, anti-static polyethylene closed-cell foam board, external isolation board, secondary lining concrete structure with air sealant are set in sequence, and buried waterstop and back-sticked waterstop are added to the construction joint of the secondary lining.
- the external water seepage into the tunnel is isolated between the disposal support and the gas isolation board, and the gas is collected and diverted to the gas discharge pipe set in the tunnel vault through the gas water vapor separation device and discharged to the tunnel entrance to ensure the safe operation of the gas tunnel.
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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)
- Architecture (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
An isolation protection system for safe operation of a gas tunnel. A first isolation layer (200) is formed in a geological body (10) outside an initial support layer (100); then an isolation structure (300) is formed on the inner side of the initial support layer (100); a water-gas discharging space (20) is formed between the isolation structure (300) and the first isolation layer (200); a water-gas separation system (400) is mounted in the water-gas discharging space (20); gas in a surrounding rock geological body is isolated in the geological body (10) by using the first isolation layer (200); and gas leaked into the water-gas discharging space (20) is isolated in the water-gas discharging space and an area outside the water-gas discharging space by using the isolation structure (300). The system can prevent gas from leaking into tunnels and affecting safe operation of the tunnels, and eliminate potential safety hazards caused by gas leakage and accumulation in gas tunnel operation.
Description
本申请要求于2022年12月29日提交中国专利局、申请号为202211709557.3、发明名称为“瓦斯隧道安全运营隔离防护系统”的中国专利申请的优先权,其全部内容通过引用结合在申请中。This application claims the priority of the Chinese patent application filed with the China Patent Office on December 29, 2022, with application number 202211709557.3 and invention name “Gas Tunnel Safe Operation Isolation and Protection System”, all contents of which are incorporated by reference in the application.
本申请涉及瓦斯隧道施工技术领域,特别涉及一种瓦斯隧道安全运营隔离防护系统。The present application relates to the technical field of gas tunnel construction, and in particular to a gas tunnel safe operation isolation and protection system.
对瓦斯隧道进行防突治理是瓦斯隧道施工过程中的重点工作。在对瓦斯隧道进行防突治理之后,可以确保在施工阶段瓦斯不突出,安全顺利完成隧道施工。对瓦斯隧道进行防突治理时,主要在瓦斯隧道外轮廓一定范围内的地质体中的瓦斯进行防突治理,随着被治理区域的瓦斯浓度的降低,未被治理区的瓦斯会朝被治理区渗漏,同时也会通过被治理区朝瓦斯隧道内渗漏,影响了隧道的使用安全性能。同时的,由于瓦斯的渗漏以及聚集而导致运营中的瓦斯隧道存在安全隐患。The prevention and control of gas tunnels is a key task in the construction process of gas tunnels. After the prevention and control of gas tunnels, it can be ensured that gas will not burst during the construction phase and the tunnel construction can be completed safely and smoothly. When the prevention and control of gas tunnels is carried out, the gas in the geological body within a certain range of the outer contour of the gas tunnel is mainly prevented from bursting. With the decrease of gas concentration in the treated area, the gas in the untreated area will leak into the treated area, and will also leak into the gas tunnel through the treated area, affecting the safety performance of the tunnel. At the same time, there are safety hazards in the gas tunnels in operation due to gas leakage and accumulation.
本申请的主要目的是提供一种瓦斯隧道安全运营隔离防护系统,旨在解决相关技术由于瓦斯的渗漏以及聚集而导致运营中的瓦斯隧道存在安全隐患的技术问题。The main purpose of this application is to provide a safe operation isolation and protection system for a gas tunnel, aiming to solve the technical problem of related technologies that there are safety hazards in operating gas tunnels due to gas leakage and accumulation.
为实现上述目的,第一方面,本申请提出的一种瓦斯隧道安全运营隔离防护系统,所述瓦斯隧道包括形成于地质体内的初期支护层,所述瓦斯隧道安全运营隔离防护系统包括:To achieve the above-mentioned purpose, in a first aspect, the present application proposes a gas tunnel safe operation isolation protection system, wherein the gas tunnel includes an initial support layer formed in a geological body, and the gas tunnel safe operation isolation protection system includes:
第一隔离层,所述第一隔离层形成于所述初期支护层的外侧的所述地质体内;a first isolation layer, the first isolation layer being formed in the geological body outside the initial support layer;
隔离结构,所述隔离结构形成于所述初期支护层的内侧,所述隔离结构与所述初期支护层之间形成有水气排放空间,且所述隔离结构能将瓦斯隔离在所述水气排放空间内;以及,an isolation structure, wherein the isolation structure is formed on the inner side of the initial support layer, a water vapor discharge space is formed between the isolation structure and the initial support layer, and the isolation structure can isolate gas in the water vapor discharge space; and,
水气分离系统,所述水气分离系统安装于所述水气排放空间内,所述水气分离系统能分离所述地质体内渗漏出水汽混合体中的液体和瓦斯,并将液体和瓦斯分别排出所述瓦斯隧道。A water-gas separation system is installed in the water-gas discharge space, and the water-gas separation system can separate the liquid and gas in the water-gas mixture leaked from the geological body, and discharge the liquid and gas into the gas tunnel respectively.
在一实施例中,所述隔离结构与所述初期支护层之间还设置有第二隔离层,且所述水气排放空间形成于所述第二隔离层与所述初期支护层之间。In one embodiment, a second isolation layer is further provided between the isolation structure and the initial supporting layer, and the water vapor discharge space is formed between the second isolation layer and the initial supporting layer.
在一实施例中,所述隔离结构包括:In one embodiment, the isolation structure comprises:
二次衬砌层,所述二次衬砌层由至少两个沿所述瓦斯隧道的开挖方向依次连接的衬砌环组成,每个所述衬砌环由至少两块沿所述瓦斯隧道的周向首尾相连的衬砌块围合形成,且任意相邻的两个所述衬砌环之间以及任意相邻的两个所述衬砌块之间均形成有施工缝;A secondary lining layer, wherein the secondary lining layer is composed of at least two lining rings connected in sequence along the excavation direction of the gas tunnel, each of the lining rings is formed by enclosing at least two lining blocks connected end to end along the circumference of the gas tunnel, and a construction joint is formed between any two adjacent lining rings and between any two adjacent lining blocks;
第一止水带,所述第一止水带设置于施工缝内;以及,A first water stop, wherein the first water stop is arranged in the construction joint; and
第二止水带,所述第二止水带对应所述施工缝设置并夹设于所述二次衬砌层与所述第二隔离层之间。A second waterstop is provided corresponding to the construction joint and sandwiched between the secondary lining layer and the second isolation layer.
在一实施例中,所述二次衬砌层由添加有气密剂的混凝土浇筑制成。In one embodiment, the secondary lining layer is made by pouring concrete with airtight agent added.
在一实施例中,所述第二隔离层与所述初期支护层之间还设置有泡沫垫层,所述泡沫垫层填充于所述水气排放空间内。In one embodiment, a foam cushion layer is further provided between the second isolation layer and the initial support layer, and the foam cushion layer is filled in the water vapor discharge space.
在一实施例中,所述水气排放空间包括第一空间以及分别与所述第一空间连通的第二空间和第三空间,所述第一空间对应所述瓦斯隧道的拱腰设置,所述第二空间对应所述瓦斯隧道的拱顶设置,所述第三空间对应所述瓦斯隧道的仰拱设置;In one embodiment, the water vapor discharge space includes a first space and a second space and a third space respectively connected to the first space, the first space is arranged corresponding to the waist of the gas tunnel, the second space is arranged corresponding to the vault of the gas tunnel, and the third space is arranged corresponding to the invert of the gas tunnel;
所述水气分离系统包括:The water-gas separation system comprises:
瓦斯排放管路,所述排放管路沿所述瓦斯隧道的开挖方向安装在所述第二空间;A gas discharge pipeline, the discharge pipeline being installed in the second space along the excavation direction of the gas tunnel;
水排放管路,所述水排放管路沿所述瓦斯隧道的开挖方向安装在所述第三空间;以及,a water discharge pipeline, the water discharge pipeline being installed in the third space along the excavation direction of the gas tunnel; and
至少两个管路分离机构,至少两个所述管路分离机构沿所述瓦斯隧道的开挖方向间隔安装在所述第一空间内,且各所述管路分离机构的顶端与所述瓦斯排放管路连通,底端与所述水排放管路连通。At least two pipeline separation mechanisms are installed in the first space at intervals along the excavation direction of the gas tunnel, and the top end of each pipeline separation mechanism is connected to the gas discharge pipeline, and the bottom end is connected to the water discharge pipeline.
在一实施例中,各所述管路分离机构包括:In one embodiment, each of the pipeline separation mechanisms comprises:
第一管路,所述第一管路沿所述瓦斯隧道的开挖方向布置;a first pipeline, wherein the first pipeline is arranged along the excavation direction of the gas tunnel;
第二管路,所述第二管路的底端与所述第一管路连通,顶端与所述瓦斯排放管路连通;a second pipeline, wherein the bottom end of the second pipeline is connected to the first pipeline, and the top end of the second pipeline is connected to the gas discharge pipeline;
第三管路,所述第三管路的顶端与所述第一管路连通,底端与所述水排放管路连通,所述第三管路远离所述第一管路的位置向下弯折形成防漏段,所述防漏段的高度低于所述第三管路与所述第一管路的连通处。A third pipeline, the top end of the third pipeline is connected to the first pipeline, and the bottom end is connected to the water discharge pipeline. The third pipeline is bent downward away from the first pipeline to form a leak-proof section, and the height of the leak-proof section is lower than the connection point between the third pipeline and the first pipeline.
在一实施例中,所述防漏段设置有导管,所述导管的底端与所述防漏段连通,顶端与所述水排放管道连通。In one embodiment, the leak-proof section is provided with a conduit, the bottom end of the conduit is connected to the leak-proof section, and the top end of the conduit is connected to the water discharge pipe.
在一实施例中,所述导管的顶部不低于所述第三管路与所述第一管路的连通处。In one embodiment, the top of the conduit is not lower than the connecting point between the third pipeline and the first pipeline.
在一实施例中,所述第一隔离层的径向宽度至少为6m。In one embodiment, the radial width of the first isolation layer is at least 6 m.
本申请技术方案通过在初期支护层外的地质体中形成第一隔离层,然后在初期支护层的内侧形成隔离结构,并且在隔离结构与第一隔离层之间形成水气排放空间,再讲水气分离系统安装在水气排放空间内,本申请利用第一隔离层将地质体内的富余瓦斯隔离在地质体中,同时利用隔离结构将渗漏至水气排放空间内的瓦斯隔离在水气排放空间极其以外的区域,使得本申请在具体实施时能够避免瓦斯渗漏至隧道内以影响隧道的安全运营,解决了相关技术中由于瓦斯的渗漏以及聚集而导致运营中的瓦斯隧道存在安全隐患,同时的,通过设置隔离结构也使得本申请解决了由于瓦斯隧道所在区域的地质体以及衬砌结构等存在裂隙或者孔洞而导致瓦斯的渗漏以及聚集而影响瓦斯隧道的正常运营的缺陷。The technical solution of the present application forms a first isolation layer in the geological body outside the initial support layer, then forms an isolation structure on the inner side of the initial support layer, and forms a water vapor discharge space between the isolation structure and the first isolation layer, and then installs the water vapor separation system in the water vapor discharge space. The present application uses the first isolation layer to isolate the surplus gas in the geological body in the geological body, and uses the isolation structure to isolate the gas leaked into the water vapor discharge space in the area outside the water vapor discharge space, so that when the present application is implemented, it can prevent gas from leaking into the tunnel to affect the safe operation of the tunnel, and solves the safety hazard of the gas tunnel in operation due to gas leakage and accumulation in the related technology. At the same time, by setting the isolation structure, the present application also solves the defect that the normal operation of the gas tunnel is affected by gas leakage and accumulation due to cracks or holes in the geological body and lining structure in the area where the gas tunnel is located.
为了更清楚地说明本申请实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图示出的结构获得其他的附图。In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
图1为本申请示例的瓦斯隧道地质结构的结构示意图;FIG1 is a schematic diagram of the structure of a gas tunnel geological structure according to an example of the present application;
图2为图1示例的地质结构的加固示意图;FIG2 is a schematic diagram of the reinforcement of the geological structure shown in FIG1;
图3为为本申请示例的加固区的平面结构示意图;FIG3 is a schematic diagram of a planar structure of a reinforcement area according to an example of the present application;
图4为申请示例的瓦斯隧道安全运营隔离防护系统的结构示意图;FIG4 is a schematic diagram of the structure of a gas tunnel safe operation isolation protection system according to an application example;
图5为本申请示例的隧道结构的横断面的结构示意图;FIG5 is a schematic structural diagram of a cross section of a tunnel structure according to an example of the present application;
图6为图5中E部放大结构的结构示意图;FIG6 is a schematic structural diagram of an enlarged structure of portion E in FIG5 ;
图7为图5中F部放大结构的结构示意图;FIG7 is a schematic structural diagram of the enlarged structure of the F portion in FIG5 ;
图8为本申请示例的水气分离系统的结构示意图;FIG8 is a schematic structural diagram of a water-gas separation system according to an example of the present application;
图9为本申请示例的隔离结构的结构示意图。FIG. 9 is a schematic diagram of the structure of the isolation structure of the present application example.
附图说明:Description of the drawings:
1010 | 地质体Geological body | 332332 | 第二止水带Second water stop |
100100 | 初期支护层Initial support layer | 333333 | 泡沫垫层Foam cushion |
200200 | 第一隔离层First isolation layer | 410410 | 瓦斯排放管路Gas discharge pipeline |
300300 | 隔离结构Isolation Structure | 420420 | 水排放管路Water discharge pipeline |
400400 | 水气分离系统Water and gas separation system | 430430 | 分离管路系统Separate piping system |
2020 | 水气排放空间Water vapor discharge space | 431431 | 第一管路First pipeline |
500500 | 第二隔离层Second isolation layer | 432432 | 第二管路Second pipeline |
330330 | 二次衬砌层Secondary lining | 433433 | 第三管路The third pipeline |
331331 | 第一止水带First water stop | 434434 | 导管catheter |
AA | 待成形区Waiting for forming area | BB | 带加固区With reinforced area |
本申请目的实现、功能特点及优点将结合实施例,参照附图做进一步说明。The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings.
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本申请的一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
需要说明,本申请实施例中所有方向性指示(诸如上、下、左、右、前、后……)仅用于解释在某一特定姿态(如附图所示)下各机构之间的相对位置关系、运动情况等,如果该特定姿态发生改变时,则该方向性指示也相应地随之改变。It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various mechanisms under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
在本申请中,除非另有明确的规定和限定,术语“连接”、“固定”等应做广义理解,例如,“固定”可以是固定连接,也可以是可拆卸连接,或成一体;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通或两个元件的相互作用关系,除非另有明确的限定。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请中的具体含义。In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
另外,若本申请实施例中有涉及“第一”、“第二”等的描述,则该“第一”、“第二”等的描述仅用于描述目的,而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外,全文中出现的“和/或”的含义,包括三个并列的方案,以“A和/或B”为例,包括A方案、或B方案、或A和B同时满足的方案。另外,各个实施例之间的技术方案可以相互结合,但是必须是以本领域普通技术人员能够实现为基础,当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在,也不在本申请要求的保护范围之内。In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and/or" appearing in the full text includes three parallel schemes. Taking "A and/or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.
下面结合一些具体实施方式进一步阐述本发明的发明构思。The inventive concept of the present invention is further described below in conjunction with some specific implementation methods.
本申请提出一种瓦斯隧道安全运营隔离防护系统。The present application proposes a gas tunnel safe operation isolation and protection system.
如图1至图6所示,提出本申请瓦斯隧道安全运营隔离防护系统的一实施例。As shown in FIG. 1 to FIG. 6 , an embodiment of the gas tunnel safe operation isolation protection system of the present application is proposed.
本实施例中,请参阅图1,该型瓦斯隧道安全运营隔离防护系统,瓦斯隧道包括形成于地质体10内的初期支护层100,瓦斯隧道安全运营隔离防护系统包括:In this embodiment, referring to FIG. 1 , the gas tunnel safe operation isolation protection system includes an initial support layer 100 formed in a geological body 10. The gas tunnel safe operation isolation protection system includes:
第一隔离层200,第一隔离层200形成于初期支护层100的外侧的地质体10内;A first isolation layer 200, which is formed in the geological body 10 outside the initial support layer 100;
隔离结构300,隔离结构300形成于初期支护层100的内侧,隔离结构300与初期支护层100之间形成有水气排放空间20,且隔离结构300能将瓦斯隔离在水气排放空间20内;以及,An isolation structure 300, wherein the isolation structure 300 is formed inside the initial support layer 100, a water vapor discharge space 20 is formed between the isolation structure 300 and the initial support layer 100, and the isolation structure 300 can isolate gas in the water vapor discharge space 20; and,
水气分离系统400,水气分离系统400安装于水气排放空间20内,水气分离系统400能分离地质体10内渗漏出水汽混合体中的液体和瓦斯,并将液体和瓦斯分别排出瓦斯隧道。The water-gas separation system 400 is installed in the water-gas discharge space 20. The water-gas separation system 400 can separate the liquid and gas in the water-gas mixture leaked from the geological body 10, and discharge the liquid and gas into the gas tunnel respectively.
在具体实施时,本申请首先将距离瓦斯隧道的轮廓面的最小净距为6m范围内的地质体10作为第一隔离层200的待成形区,然后将距离煤层的最小净距为10m以及沿开挖方向穿过煤层最小净距10m之后的区域作为待加固区,接下来在距离煤层最小净距为10的掌子面同时对待成形区和待加固区进行帷幕注浆,以使待成形区和待加固区共同形成加固体,接下来在完成帷幕注浆之后的掌子面对待加固区进行开挖施工,直至掌子面穿过煤层最小净距10m之后形成当前隧道段,在当前隧道段的轮廓面对待成形区进行径向注浆,以使得待成形区转换为第一隔离层200。In specific implementation, the present application first uses the geological body 10 within the minimum clear distance of 6m from the contour surface of the gas tunnel as the to-be-formed area of the first isolation layer 200, and then uses the minimum clear distance of 10m from the coal seam and the area after the minimum clear distance of 10m through the coal seam in the excavation direction as the to-be-reinforced area. Next, curtain grouting is performed on the to-be-formed area and the to-be-reinforced area at the same time on the heading face with the minimum clear distance of 10m from the coal seam, so that the to-be-formed area and the to-be-reinforced area jointly form a reinforced body. Next, excavation construction is carried out on the heading face to be reinforced after the curtain grouting is completed, until the current tunnel section is formed after the heading face passes through the minimum clear distance of 10m from the coal seam, and radial grouting is performed on the to-be-formed area on the contour surface of the current tunnel section, so that the to-be-formed area is converted into the first isolation layer 200.
需要特别和明确说明的是,在本实施例中,进行帷幕注浆时所采用的浆液为水泥浆液,径向注浆的浆液采用水泥:水为1:1的水泥单浆液。It should be particularly and clearly stated that, in the present embodiment, the slurry used for curtain grouting is cement slurry, and the slurry for radial grouting is a single cement slurry with a cement: water ratio of 1:1.
本申请技术方案通过在初期支护层100外的地质体10中形成第一隔离层200,然后在初期支护层100的内侧形成隔离结构300,并且在隔离结构300与第一隔离层200之间形成水气排放空间20,再讲水气分离系统400安装在水气排放空间20内,本申请利用第一隔离层200将地质体10内的富余瓦斯隔离在地质体10中,同时利用隔离结构300将渗漏至水气排放空间20内的瓦斯隔离在水气排放空间20极其以外的区域,使得本申请在具体实施时能够避免瓦斯渗漏至隧道内以影响隧道的安全运营,解决了相关技术中由于瓦斯的渗漏以及聚集而导致运营中的瓦斯隧道存在安全隐患,同时的,通过设置隔离结构也使得本申请解决了由于瓦斯隧道所在区域的地质体以及衬砌结构等存在裂隙或者孔洞而导致瓦斯的渗漏以及聚集而影响瓦斯隧道的正常运营的缺陷。The technical solution of the present application forms a first isolation layer 200 in the geological body 10 outside the initial support layer 100, then forms an isolation structure 300 on the inner side of the initial support layer 100, and forms a water vapor discharge space 20 between the isolation structure 300 and the first isolation layer 200, and then the water vapor separation system 400 is installed in the water vapor discharge space 20. The present application uses the first isolation layer 200 to isolate the surplus gas in the geological body 10 in the geological body 10, and uses the isolation structure 300 to isolate the gas leaking into the water vapor discharge space 20 in the area outside the water vapor discharge space 20, so that the present application can avoid gas leakage into the tunnel to affect the safe operation of the tunnel during specific implementation, and solves the safety hazard of the gas tunnel in operation due to gas leakage and accumulation in the related technology. At the same time, by setting the isolation structure, the present application also solves the defect that the normal operation of the gas tunnel is affected by gas leakage and accumulation due to cracks or holes in the geological body and lining structure in the area where the gas tunnel is located.
在一些具体实施例中,隔离结构300与初期支护层100之间还设置有第二隔离层310,且水气排放空间20形成于第二隔离层310与初期支护层100之间。In some specific embodiments, a second isolation layer 310 is further disposed between the isolation structure 300 and the initial support layer 100 , and a moisture discharge space 20 is formed between the second isolation layer 310 and the initial support layer 100 .
在本实施例中,通过在隔离结构300与初期支护层100之间设置第二隔离层310,并且使得水气排放空间20形成于第二隔离层310与初期支护层100之间,使得本申请在具体实施时能够利用设置的第二隔离层310对排放至水气排放空间20内的瓦斯气体进行二次隔离,及提升了本申请示例的隔离系统的隔离效果,同时通过设置的第二隔离结构300,也使得本申请示例的防护系统应用于含有酸性气体的瓦斯或者瓦斯气体中的部分气体溶于水之后形成醛类物质的环境时,能够减缓示例的物质的隔离结构300造成的腐蚀,提升了本申请示例防护系统的使用寿命。并且通过设置的第二隔离层310,也使得本申请在具体实施时能够防止水对隔离结构300的侵蚀,保证的隔离结构300的隔离性能。In this embodiment, by setting a second isolation layer 310 between the isolation structure 300 and the initial support layer 100, and forming the water vapor discharge space 20 between the second isolation layer 310 and the initial support layer 100, the present application can use the second isolation layer 310 to perform secondary isolation on the gas discharged into the water vapor discharge space 20 during specific implementation, and improve the isolation effect of the isolation system of the present application example. At the same time, by setting the second isolation structure 300, the protection system of the present application example is applied to an environment where gas containing acidic gas or part of the gas in the gas is dissolved in water to form aldehyde substances, which can slow down the corrosion caused by the isolation structure 300 of the example substance, thereby improving the service life of the protection system of the present application example. In addition, by setting the second isolation layer 310, the present application can prevent water from corroding the isolation structure 300 during specific implementation, thereby ensuring the isolation performance of the isolation structure 300.
需要特别和明确说明的是,示例的第二隔离层310可以但不限于为瓦斯隔离板,其中,瓦斯隔离板采用现有的玻纤布等材料制成,本申请仅进行应用,并不涉及示例的瓦斯隔离板自身结构的改进或者设计,此处不在赘述。It should be particularly and clearly stated that the second isolation layer 310 of the example can be but is not limited to a gas isolation board, wherein the gas isolation board is made of existing glass fiber cloth and other materials. This application is only for application and does not involve the improvement or design of the structure of the example gas isolation board itself, which will not be elaborated here.
在一些具体实施例中,隔离结构300包括:In some specific embodiments, the isolation structure 300 includes:
二次衬砌层330,二次衬砌层330由至少两个沿瓦斯隧道的开挖方向依次连接的衬砌环组成,每个衬砌环由至少两块沿瓦斯隧道的周向首尾相连的衬砌块围合形成,且任意相邻的两个衬砌环之间以及任意相邻的两个衬砌块之间均形成有施工缝;A secondary lining layer 330, which is composed of at least two lining rings connected in sequence along the excavation direction of the gas tunnel, each lining ring is formed by at least two lining blocks connected end to end along the circumference of the gas tunnel, and a construction joint is formed between any two adjacent lining rings and between any two adjacent lining blocks;
第一止水带331,第一止水带331设置于施工缝内;以及,A first water stop 331 is provided in the construction joint; and
第二止水带332,第二止水带332对应施工缝设置并夹设于二次衬砌层330与第二隔离层310之间。The second waterstop 332 is arranged corresponding to the construction joint and is sandwiched between the secondary lining layer 330 and the second isolation layer 310 .
在本实施例中,通过设置二次衬砌层330,并且在二次衬砌层330的各个施工缝内均设置第一止水带331,同时在二次衬砌层330与第二隔离层310之间夹设第二止水带332,使得本申请在具体实施时,可以通过设置的两层止水带提升施工缝的密封效果,进而使得瓦斯能够被完全隔离在二次衬砌层330靠近于第二隔离层310的一侧。In this embodiment, a secondary lining layer 330 is provided, and a first waterstop 331 is provided in each construction joint of the secondary lining layer 330, and a second waterstop 332 is sandwiched between the secondary lining layer 330 and the second isolation layer 310. When the present application is implemented, the sealing effect of the construction joint can be improved by the two layers of waterstop, so that the gas can be completely isolated on the side of the secondary lining layer 330 close to the second isolation layer 310.
需要特别和明确说明的是,在本实施例中,示例的第一止水带331与第二止水带332均可以但不限于为遇水膨胀止水带。示例的二次衬砌层330采用添加有气密剂的混凝土浇筑制成。It should be particularly and clearly stated that in this embodiment, the first water stop 331 and the second water stop 332 can be, but are not limited to, water-swellable water stop. The secondary lining layer 330 is made of concrete with airtight agent added.
在一些具体实施例中,二次衬砌层330由添加有气密剂的混凝土浇筑制成。In some specific embodiments, the secondary lining layer 330 is made of concrete poured with an airtight agent added.
在本实施例中,采用添加有气密剂的混凝土浇筑制成二次衬砌层330,使得本申请在具体实施时能够提升整个二次衬砌层330的密封性能,进而可以有效防止瓦斯从二次衬砌层330内渗漏至隧道内。In this embodiment, the secondary lining layer 330 is formed by pouring concrete with an airtight agent added, so that the sealing performance of the entire secondary lining layer 330 can be improved during the specific implementation of the present application, thereby effectively preventing gas from leaking from the secondary lining layer 330 into the tunnel.
需要特别和明确说明的是,在本实施例中,示例的混凝土以及混凝土中的气密剂添加量至少满足如下组分:每立方混凝土中的气密剂的添加量为每立方混凝土中的水泥用量的2%。It should be particularly and clearly stated that, in this embodiment, the concrete and the amount of airtight agent added to the concrete at least meet the following requirements: the amount of airtight agent added to each cubic meter of concrete is 2% of the amount of cement in each cubic meter of concrete.
在一些具体实施例中,第二隔离层310与初期支护层100之间还设置有泡沫垫层333,泡沫垫层333填充于水气排放空间20内。In some specific embodiments, a foam cushion layer 333 is further disposed between the second isolation layer 310 and the initial support layer 100 , and the foam cushion layer 333 is filled in the moisture discharge space 20 .
在本实施例中,通过在第二隔离层310与初期支护层100之间设置泡沫垫层333,使得本申请在具体实施时能够避免尖锐物体侵入至第二隔离层310以对第二隔离层310造成损害,提升了本申请示例的防护系统的防护性能。In this embodiment, by providing a foam pad layer 333 between the second isolation layer 310 and the initial support layer 100, the present application can prevent sharp objects from intruding into the second isolation layer 310 to cause damage to the second isolation layer 310 during specific implementation, thereby improving the protective performance of the protective system of the present application example.
需要特别和明确说明的是,在本实施例中,示例的泡沫垫层的安装顺序为,完成初期支护层100之后,便在初期支护层的内侧安装水气分离系统,完成水气分离系统的安装之后,便在水气分离系统的内侧安装泡沫垫层333,完成泡沫垫层333的安装之后,便在泡沫垫层333的内侧安装第二隔离板并直至整个防护系统施工完成。It should be particularly and clearly stated that, in the present embodiment, the installation sequence of the exemplary foam cushion layer is as follows: after the initial support layer 100 is completed, the water vapor separation system is installed on the inner side of the initial support layer; after the installation of the water vapor separation system is completed, the foam cushion layer 333 is installed on the inner side of the water vapor separation system; after the installation of the foam cushion layer 333 is completed, the second isolation board is installed on the inner side of the foam cushion layer 333 until the construction of the entire protection system is completed.
在一些具体实施例中,水气排放空间20包括第一空间以及分别与第一空间连通的第二空间和第三空间,第一空间对应瓦斯隧道的拱腰设置,第二空间对应瓦斯隧道的拱顶设置,第三空间对应瓦斯隧道的仰拱设置;In some specific embodiments, the water vapor discharge space 20 includes a first space and a second space and a third space respectively connected to the first space, the first space corresponds to the waist of the gas tunnel, the second space corresponds to the vault of the gas tunnel, and the third space corresponds to the invert of the gas tunnel;
水气分离系统400包括:The water-gas separation system 400 comprises:
瓦斯排放管路410,排放管路沿瓦斯隧道的开挖方向安装在第二空间;A gas discharge pipeline 410, which is installed in the second space along the excavation direction of the gas tunnel;
水排放管路420,水排放管路420沿瓦斯隧道的开挖方向安装在第三空间;以及,A water discharge pipeline 420, which is installed in the third space along the excavation direction of the gas tunnel; and
至少两个管路分离机构,至少两个管路分离机构沿瓦斯隧道的开挖方向间隔安装在第一空间内,且各管路分离机构的顶端与瓦斯排放管路410连通,底端与水排放管路420连通。At least two pipeline separation mechanisms are installed in the first space at intervals along the excavation direction of the gas tunnel, and the top end of each pipeline separation mechanism is connected to the gas discharge pipeline 410, and the bottom end is connected to the water discharge pipeline 420.
在本实施例中,通过设置在第二空间内设置瓦斯排放管路410,在第三空间内设置水排放管路420,同时将管路分离机构设置在第一空间内,使得本申请在具体实施时,深入至第一空间内的水气混合体中的水和瓦斯能够通过固有的性质进行分离,不必单独设置动力机构,提升了本申请示例的瓦斯隔离防护系统的便捷性。In this embodiment, a gas discharge pipeline 410 is set in the second space, a water discharge pipeline 420 is set in the third space, and a pipeline separation mechanism is set in the first space. When the present application is implemented, the water and gas in the water-gas mixture that penetrates into the first space can be separated by their inherent properties without having to set up a separate power mechanism, thereby improving the convenience of the gas isolation and protection system of the example of the present application.
在一些具体实施例中,各管路分离机构包括:In some specific embodiments, each pipeline separation mechanism includes:
第一管路431,第一管路431沿瓦斯隧道的开挖方向布置;A first pipeline 431, the first pipeline 431 is arranged along the excavation direction of the gas tunnel;
第二管路432,第二管路432的底端与第一管路431连通,顶端与瓦斯排放管路410连通;A second pipeline 432, the bottom end of the second pipeline 432 is connected to the first pipeline 431, and the top end of the second pipeline 432 is connected to the gas discharge pipeline 410;
第三管路433,第三管路433的顶端与第一管路431连通,底端与水排放管路420连通,第三管路433远离第一管路431的位置向下弯折形成防漏段,防漏段的高度低于第三管路433与第一管路431的连通处。The third pipeline 433, the top end of the third pipeline 433 is connected to the first pipeline 431, and the bottom end is connected to the water discharge pipeline 420. The third pipeline 433 is bent downward away from the first pipeline 431 to form a leak-proof section, and the height of the leak-proof section is lower than the connection point between the third pipeline 433 and the first pipeline 431.
在本实施例中,第一管路431用于供地质体10内渗出的水汽混合体通过,以使水气混合体中的瓦斯经过第二管路432排放至瓦斯排放管路410中,并使水气混合体中的液体经过第三管路433排放至水排放管路420中。使得水与瓦斯能够分别排放。同时让第三管路433远离第一管路431的位置向下弯折形成防漏段,防漏段的高度低于第三管路433与第一管路431的连通处,使得本申请在具体实施时能够避免瓦斯从第三管路433流入隧道内,造成对隧道内的污染,提升了隧道在使用时的安全性能。In this embodiment, the first pipeline 431 is used for the water vapor mixture seeping out of the geological body 10 to pass through, so that the gas in the water vapor mixture is discharged to the gas discharge pipeline 410 through the second pipeline 432, and the liquid in the water vapor mixture is discharged to the water discharge pipeline 420 through the third pipeline 433. Water and gas can be discharged separately. At the same time, the third pipeline 433 is bent downward away from the first pipeline 431 to form a leak-proof section, and the height of the leak-proof section is lower than the connection point between the third pipeline 433 and the first pipeline 431, so that the present application can prevent gas from flowing into the tunnel from the third pipeline 433 during specific implementation, causing pollution in the tunnel, and improving the safety performance of the tunnel during use.
在一些具体实施例中,防漏段设置有导管434,导管434的底端与防漏段连通,顶端与水排放管道连通。In some specific embodiments, the leak-proof section is provided with a conduit 434, the bottom end of the conduit 434 is connected to the leak-proof section, and the top end is connected to the water discharge pipe.
在本实施例中,通过设置导管434,利用导管434将防漏段与水排放管道连通,使得本申请在实施时能够避免防漏段因为缺少水而引发的瓦斯泄漏至隧道内的隐患。In this embodiment, by providing a conduit 434, the leak-proof section is connected to the water discharge pipe using the conduit 434, so that when the present application is implemented, the hidden danger of gas leakage into the tunnel due to lack of water in the leak-proof section can be avoided.
在一些具体实施例中,导管434的顶部不低于第三管路433与第一管路431的连通处。In some specific embodiments, the top of the conduit 434 is not lower than the connection point between the third pipeline 433 and the first pipeline 431 .
在本实施例中,让导管434的顶部不低于第三管路433与第一管路431的连通处,使得本申请在具体实施时能够使得防漏段以及弯折段内始终有水蓄积,提升了第三管路433的密封性能。In this embodiment, the top of the conduit 434 is not lower than the connection point between the third pipeline 433 and the first pipeline 431, so that water can always accumulate in the leak-proof section and the bending section during the specific implementation of the present application, thereby improving the sealing performance of the third pipeline 433.
在一些具体实施例中,第一隔离层200的径向宽度至少为6m。In some specific embodiments, the radial width of the first isolation layer 200 is at least 6 m.
在一些具体实施例中,隧道围岩内也存在大量裂隙;瓦斯防突治理施作抽排钻孔、水力割缝或水力压裂等措施,在煤层中形成孔洞或裂隙;隧道初期支护施工系统锚杆、锁脚锚杆或超前支护等措施,在围岩内形成了孔洞;喷射土与围岩没有完全密贴而形成的缝隙隙;受围岩收敛变形和沉降影响,也会岩体内形成裂隙。这些在裂隙或缝隙,是瓦斯向隧道内溢出的通道。而瓦斯突出治理主要是确保隧道施工阶段瓦斯不再突出,但在隧道通车运营阶段,在瓦斯压力和浓度梯度差的作用下,瓦斯沿裂隙或孔洞向隧道内位移,可能渗透进入通行隧道内,存在较大安全隐患。In some specific embodiments, there are also a large number of cracks in the tunnel surrounding rock; gas outburst prevention measures such as drainage drilling, hydraulic cutting or hydraulic fracturing form holes or cracks in the coal seam; the initial support construction system of the tunnel, anchor rods, locking anchor rods or advance support measures form holes in the surrounding rock; the gaps formed by the injection soil and the surrounding rock are not completely close together; cracks will also form in the rock mass due to the convergence deformation and settlement of the surrounding rock. These cracks or gaps are channels for gas to overflow into the tunnel. The main purpose of gas outburst control is to ensure that gas no longer outbursts during the tunnel construction stage, but during the tunnel opening and operation stage, under the action of gas pressure and concentration gradient difference, gas moves into the tunnel along cracks or holes, and may penetrate into the tunnel, posing a major safety hazard.
本申请的目的就是,通过对围岩和煤层注浆固结,防止瓦斯通过围岩列写和通道渗入衬砌背后;通过在隧道支护和衬砌系统内设置的隔断和排出系统,将少量渗入到隧道内的瓦斯阻断在二次衬砌背后,通过在衬砌背后排除管道引流到洞口排出,不渗入隧道内,确保瓦斯隧道内安全运营。The purpose of this application is to prevent gas from penetrating into the back of the lining through the surrounding rock columns and channels by grouting consolidation of the surrounding rock and coal seams; to block the small amount of gas that penetrates into the tunnel behind the secondary lining through the partition and discharge system set up in the tunnel support and lining system, and to drain the gas to the cave entrance through the exclusion pipe behind the lining to prevent it from penetrating into the tunnel, thereby ensuring safe operation in the gas tunnel.
将接近沿煤层组10m和远离煤层组10m的沿隧道长度范围,隧道开挖轮廓线5-6m范围内的围岩和煤层帷幕注浆,用水泥浆充填围岩裂隙、因瓦斯治理形成的缝隙和孔洞,固结成一个整体,形成一道屏障,将瓦斯隔绝在圈外;在完成隧道完成支护喷射砼施工后,采用径向小导管434注浆,将岩体内形成的裂隙或孔洞封闭。通过两轮注浆,在隧道隧道衬砌背后6m范围内形成一圈整体围岩体,隔绝段瓦斯渗入衬砌净空。Grouting is performed on the surrounding rock and coal seam curtains within the range of 10m along the coal seam group and 10m away from the coal seam group, and within the range of 5-6m of the tunnel excavation contour line. Cement slurry is used to fill the surrounding rock cracks, gaps and holes formed due to gas treatment, and consolidate them into a whole, forming a barrier to isolate the gas outside the circle; after the completion of the tunnel support shotcrete construction, radial small pipe 434 grouting is used to close the cracks or holes formed in the rock body. Through two rounds of grouting, a circle of integral surrounding rock mass is formed within 6m behind the tunnel lining, isolating the gas from penetrating into the lining clearance.
在初期支护设依次设置水汽分离装置,瓦斯排出管道,防静电聚乙烯闭孔泡沫板、外隔离板、掺气密剂的二次衬砌混凝土结构,以及在二次衬砌施工缝增加中埋式止水带和背贴式止水带,将渗出向隧道内的外隔离在处置支护和瓦斯隔离板之间,并通过瓦斯水汽分离装置将瓦斯收集导流到设置到隧道拱顶的瓦斯排除管道排出到隧道洞口,确保瓦斯隧道安全运营。In the initial support, water vapor separation device, gas discharge pipe, anti-static polyethylene closed-cell foam board, external isolation board, secondary lining concrete structure with air sealant are set in sequence, and buried waterstop and back-sticked waterstop are added to the construction joint of the secondary lining. The external water seepage into the tunnel is isolated between the disposal support and the gas isolation board, and the gas is collected and diverted to the gas discharge pipe set in the tunnel vault through the gas water vapor separation device and discharged to the tunnel entrance to ensure the safe operation of the gas tunnel.
同时,本申请还示例出防护系统的施工方法,具体如下:At the same time, this application also illustrates the construction method of the protection system, which is as follows:
S201、某隧道瓦斯突出治理后,此时掌子面距离煤层法线10m处,采用20cm厚的C25喷射砼将掌子面全部封闭。S201. After a gas outburst in a tunnel was controlled, the face was 10m away from the normal line of the coal seam. 20cm thick C25 shotcrete was used to seal the face completely.
S202、完成封闭后,在掌子面设环注浆孔,注浆孔自掌子面以隧道中线呈伞状布设,注浆孔孔口间距环向间距为50cm,每环间距2m左右,孔底间距不大于3m;纵向设3环注浆管孔,注浆段长30m,分3环,第一环长12m,第二环长20m,第三环长30米,第一段注浆完成后不开挖作为一下段的止浆岩盘。S202. After the closure is completed, ring grouting holes are set on the tunnel face. The grouting holes are arranged in an umbrella shape from the tunnel face to the center line of the tunnel. The circumferential spacing between the grouting holes is 50cm, the spacing between each ring is about 2m, and the spacing between the hole bottoms is not more than 3m; 3 rings of grouting pipe holes are set longitudinally, and the grouting section is 30m long, divided into 3 rings, the first ring is 12m long, the second ring is 20m long, and the third ring is 30m long. After the grouting of the first section is completed, no excavation is done to serve as the grouting stop rock plate for the next section.
S203、钻孔直径为115mm,在钻孔内埋设直径108mm无缝钢管作为孔口管,孔口管长3m,在掌子面外出露20-30cm。S203, the borehole diameter is 115mm, and a 108mm diameter seamless steel pipe is buried in the borehole as the orifice pipe. The orifice pipe is 3m long and exposed 20-30cm outside the face.
S204、孔口管埋设后,采用锚固剂将孔口管与喷射砼之间空气堵塞迷密室,预留1cm左右空隙,再采用并采用棉纱和水泥砂浆或AB胶将孔口封堵,待孔口部分凝固后,采用6m钢板将外露108孔口管焊接,并采用直径4cm注浆水龙头焊接在钢板上作为注浆口。S204. After the orifice pipe is buried, use anchoring agent to block the air in the space between the orifice pipe and the shotcrete, leaving a gap of about 1 cm, and then use cotton yarn and cement mortar or AB glue to seal the orifice. After the orifice is partially solidified, use 6m steel plate to weld the exposed 108 orifice pipe, and use a 4cm diameter grouting tap welded to the steel plate as the grouting port.
S205、注浆,按照施工从内向外注浆,每一环从仰拱底部从隧道两侧对称顺序向拱顶依次注浆,注浆采用1:1水泥单液浆,注浆初压0.5-1.0MPa,终压2.0MPa;浆液扩散半径为2m。注浆完成第一环后施作第二环、然后第三环和第四环,S205, grouting, according to the construction from the inside to the outside, each ring from the bottom of the invert arch from both sides of the tunnel to the arch top in symmetrical order, grouting uses 1:1 cement single liquid slurry, the initial grouting pressure is 0.5-1.0MPa, the final pressure is 2.0MPa; the slurry diffusion radius is 2m. After the first ring of grouting is completed, the second ring, then the third ring and the fourth ring are applied.
S206、加固煤层,施工完成并凝固后,采用渐进式揭煤方式揭开煤层。每揭开煤层施工26m后再进行第二轮帷幕注浆,按此顺序直至帷幕注浆至离开煤层法线10m后,不再进行帷幕注浆。S206, after the coal seam is reinforced and solidified, the coal seam is uncovered by progressive coal uncovering. After every 26m of coal seam uncovering, the second round of curtain grouting is carried out, and this sequence is repeated until the curtain grouting is 10m away from the normal line of the coal seam, and no more curtain grouting is carried out.
S207、当仰拱完成初期支护,围岩水平收敛和拱顶沉降稳定后,开始实施初期支护背后注浆,初期支护背后注浆长度段落,定义为接近煤层法线10m和完成揭煤后远离法线10m的长度范围。S207. When the initial support of the invert is completed, the surrounding rock converges horizontally and the arch crown settlement is stable, start grouting behind the initial support. The length section of the initial support behind the grouting is defined as the length range from 10m close to the normal line of the coal seam to 10m away from the normal line after the coal is uncovered.
S208、初期支护背后注浆,注浆顺序依次从仰拱部底部顺序向边墙,拱顶延伸,直至完成远离煤层法线截止。S208, initial support back grouting, the grouting sequence is from the bottom of the arch to the side wall, the arch top, until the end away from the coal seam normal.
由帷幕注浆和小导管434系统注浆构成的瓦斯隔离系统,将瓦斯阻挡在开挖轮廓线外,尽可能避免瓦斯渗透到开挖轮廓线内。The gas isolation system consisting of curtain grouting and small duct 434 system grouting blocks the gas outside the excavation outline and avoids gas penetration into the excavation outline as much as possible.
S209、完成初期支护后,安装水汽分离装置,水汽混合气体通过三通,瓦斯气体进入,通过环向软式透水管,排入向隧道洞口排出;水进入,在的端头进入,排入隧道中心排水沟中拍出好洞外。S209. After completing the initial support, install the water-vapor separation device. The water-vapor mixed gas passes through the tee, and the gas enters and is discharged into the tunnel entrance through the annular soft permeable pipe; water enters and enters at the end, and is discharged into the drainage ditch in the center of the tunnel and out of the hole.
环向软式透水管,沿喷射混凝土表面安装固定,在初期支护和瓦斯隔离板之间形成一个通道,可收集表面渗水,顺软管向下流入边墙出处纵向排水管;环向软式透水管还可收集瓦斯气体,向上进入安装在拱顶的排气管,排气管沿隧道全长安装,在煤系地层段为HDPE DN/ID100双壁波纹管,在非瓦斯段采用100PVC管。The annular soft permeable pipe is installed and fixed along the surface of the shotcrete, forming a channel between the initial support and the gas isolation board, which can collect surface seepage water and flow downward along the hose into the longitudinal drainage pipe at the side wall; the annular soft permeable pipe can also collect gas and go upward into the exhaust pipe installed on the arch. The exhaust pipe is installed along the entire length of the tunnel. It is a HDPE DN/ID100 double-wall corrugated pipe in the coal-bearing stratum section and a 100PVC pipe in the non-gas section.
S209、水汽分离装置和排水排气管道后,将防静电聚乙烯闭孔泡沫板固定在喷射砼表面,完全覆盖喷射混凝土表面和管道,防止有尖锐物体刺穿瓦斯隔离板;再安装瓦斯隔离板,瓦斯隔离板沿隧道全幅铺设,宽2-2.5m,每幅之间采用爬焊机热熔连接,连接宽度不小于15cm,并经充气试验检测不漏气方可继续铺设。S209, after installing the water vapor separation device and the drainage and exhaust pipes, fix the antistatic polyethylene closed-cell foam board on the sprayed concrete surface, completely covering the sprayed concrete surface and the pipes to prevent sharp objects from piercing the gas isolation board; then install the gas isolation board. The gas isolation board is laid along the entire width of the tunnel, with a width of 2-2.5m. Each section is connected by hot-melt connection with a climbing welding machine. The connection width is not less than 15cm, and it can be laid only after the inflation test is tested for air leakage.
210、完成瓦斯隔离板安装并经检测合格后才能施工二次衬砌混凝土,混凝土中按照设计要求添加气密剂,增加混凝土密实性,提高防水能力,在混凝土施工缝,在二次衬砌混凝土背后安装宽度30cm的背贴式止水带,在混凝土厚度中部位置安装中埋式止水带。210. The secondary lining concrete can only be constructed after the gas isolation board is installed and tested to be qualified. Air sealant is added to the concrete according to the design requirements to increase the density of the concrete and improve its waterproof ability. A 30cm wide back-sticked waterstop is installed at the concrete construction joint and behind the secondary lining concrete, and an embedded waterstop is installed in the middle of the concrete thickness.
S211、本申请可对隧道轮廓线周边进行帷幕注浆和径向注浆加固,构成的第一瓦斯隔断层,将煤层和围岩中的裂隙和孔洞封闭,堵死瓦斯外溢通道,达到隔离外部瓦斯的作用,将瓦斯隔离在隧道开挖轮廓线6m以外,可提高煤层的稳定系数;由防静电聚乙烯闭孔泡沫板、瓦斯隔离板、掺气密剂的二次衬砌混凝土,背贴式止水带和中埋式止水带结构组成第二瓦斯隔断系统:将穿过瓦斯隔断系统逸出的瓦斯进行封闭,利用由水汽分离装置、环向软式透水管和拱顶纵向排气管构成的排水排气系统将瓦斯排出洞外,尽量避免瓦斯气体渗入隧道内,提高瓦斯隧道工程运营的安全性。S211. The present application can carry out curtain grouting and radial grouting reinforcement around the tunnel contour line to form the first gas isolation layer, which can seal the cracks and holes in the coal seam and surrounding rock, block the gas overflow channel, and achieve the effect of isolating external gas. The gas is isolated at 6m outside the tunnel excavation contour line, which can improve the stability factor of the coal seam; the second gas isolation system is composed of anti-static polyethylene closed-cell foam board, gas isolation board, secondary lining concrete mixed with air sealant, back-attached waterstop and buried waterstop structure: the gas escaping through the gas isolation system is sealed, and the gas is discharged out of the cave by using the drainage and exhaust system composed of a water vapor separation device, annular soft permeable pipe and arch longitudinal exhaust pipe, so as to avoid gas gas from penetrating into the tunnel as much as possible, and improve the safety of gas tunnel engineering operation.
在本实施例中,本申请技术方案通过在初期支护层100外的地质体10中形成第一隔离层200,然后在初期支护层100的内侧形成隔离结构300,并且在隔离结构300与第一隔离层200之间形成水气排放空间20,再将水气分离系统400安装在水气排放空间20内,本申请利用第一隔离层200将地质体10内的富余瓦斯隔离在地质体10中,同时利用隔离结构300将渗漏至水气排放空间20内的瓦斯隔离在水气排放空间20极其以外的区域,使得本申请在具体实施时能够避免瓦斯渗漏至隧道内以影响隧道的安全运营,解决了相关技术中由于瓦斯的渗漏以及聚集而导致运营中的瓦斯隧道存在安全隐患,同时的,通过设置隔离结构也使得本申请解决了由于瓦斯隧道所在区域的地质体以及衬砌结构等存在裂隙或者孔洞而导致瓦斯的渗漏以及聚集而影响瓦斯隧道的正常运营的缺陷。In this embodiment, the technical solution of the present application forms a first isolation layer 200 in the geological body 10 outside the initial support layer 100, and then forms an isolation structure 300 on the inner side of the initial support layer 100, and forms a water vapor discharge space 20 between the isolation structure 300 and the first isolation layer 200, and then installs the water vapor separation system 400 in the water vapor discharge space 20. The present application uses the first isolation layer 200 to isolate the surplus gas in the geological body 10 in the geological body 10, and uses the isolation structure 300 to isolate the gas leaking into the water vapor discharge space 20 in the area outside the water vapor discharge space 20, so that the present application can avoid gas leakage into the tunnel to affect the safe operation of the tunnel during specific implementation, and solves the safety hazard of the gas tunnel in operation due to gas leakage and accumulation in the related technology. At the same time, by setting the isolation structure, the present application also solves the defect that the normal operation of the gas tunnel is affected by gas leakage and accumulation due to cracks or holes in the geological body and lining structure in the area where the gas tunnel is located.
以上所述仅为本申请的实施例,并非因此限制本申请的专利范围,凡是在本申请的申请构思下,利用本申请说明书及附图内容所作的等效结构变换,或直接/间接运用在其他相关的技术领域均包括在本申请的专利保护范围内。The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the application concept of the present application, or direct/indirect applications in other related technical fields, are included in the patent protection scope of the present application.
Claims (10)
- 一种瓦斯隧道安全运营隔离防护系统,所述瓦斯隧道包括形成于地质体内的初期支护层,其中,所述瓦斯隧道安全运营隔离防护系统包括:A gas tunnel safe operation isolation protection system, the gas tunnel includes an initial support layer formed in a geological body, wherein the gas tunnel safe operation isolation protection system includes:第一隔离层,所述第一隔离层形成于所述初期支护层的外侧的所述地质体内;a first isolation layer, the first isolation layer being formed in the geological body outside the initial support layer;隔离结构,所述隔离结构形成于所述初期支护层的内侧,所述隔离结构与所述初期支护层之间形成有水气排放空间,且所述隔离结构能将瓦斯隔离在所述水气排放空间内;以及,an isolation structure, wherein the isolation structure is formed on the inner side of the initial support layer, a water vapor discharge space is formed between the isolation structure and the initial support layer, and the isolation structure can isolate gas in the water vapor discharge space; and,水气分离系统,所述水气分离系统安装于所述水气排放空间内,所述水气分离系统能分离所述地质体内渗漏出水汽混合体中的液体和瓦斯,并将液体和瓦斯分别排出所述瓦斯隧道。A water-gas separation system is installed in the water-gas discharge space, and the water-gas separation system can separate the liquid and gas in the water-gas mixture leaked from the geological body, and discharge the liquid and gas into the gas tunnel respectively.
- 如权利要求1所述的瓦斯隧道安全运营隔离防护系统,其中,所述隔离结构与所述初期支护层之间还设置有第二隔离层,且所述水气排放空间形成于所述第二隔离层与所述初期支护层之间。The gas tunnel safe operation isolation and protection system as described in claim 1, wherein a second isolation layer is further arranged between the isolation structure and the initial support layer, and the water vapor discharge space is formed between the second isolation layer and the initial support layer.
- 如权利要求2所述的瓦斯隧道安全运营隔离防护系统,其中,所述隔离结构包括:The gas tunnel safe operation isolation protection system according to claim 2, wherein the isolation structure comprises:二次衬砌层,所述二次衬砌层由至少两个沿所述瓦斯隧道的开挖方向依次连接的衬砌环组成,每个所述衬砌环由至少两块沿所述瓦斯隧道的周向首尾相连的衬砌块围合形成,且任意相邻的两个所述衬砌环之间以及任意相邻的两个所述衬砌块之间均形成有施工缝;A secondary lining layer, wherein the secondary lining layer is composed of at least two lining rings connected in sequence along the excavation direction of the gas tunnel, each of the lining rings is formed by enclosing at least two lining blocks connected end to end along the circumference of the gas tunnel, and a construction joint is formed between any two adjacent lining rings and between any two adjacent lining blocks;第一止水带,所述第一止水带设置于施工缝内;以及,A first water stop, wherein the first water stop is arranged in the construction joint; and第二止水带,所述第二止水带对应所述施工缝设置并夹设于所述二次衬砌层与所述第二隔离层之间。A second waterstop is provided corresponding to the construction joint and sandwiched between the secondary lining layer and the second isolation layer.
- 如权利要求3所述的瓦斯隧道安全运营隔离防护系统,其中,所述二次衬砌层由添加有气密剂的混凝土浇筑制成。The gas tunnel safe operation isolation and protection system as described in claim 3, wherein the secondary lining layer is made of concrete poured with an airtight agent added.
- 如权利要求3所述的瓦斯隧道安全运营隔离防护系统,其中,所述第二隔离层与所述初期支护层之间还设置有泡沫垫层,所述泡沫垫层填充于所述水气排放空间内。The gas tunnel safe operation isolation and protection system as described in claim 3, wherein a foam cushion layer is also arranged between the second isolation layer and the initial support layer, and the foam cushion layer is filled in the water vapor discharge space.
- 如权利要求1至5中任一项所述的瓦斯隧道安全运营隔离防护系统,其中,所述水气排放空间包括第一空间以及分别与所述第一空间连通的第二空间和第三空间,所述第一空间对应所述瓦斯隧道的拱腰设置,所述第二空间对应所述瓦斯隧道的拱顶设置,所述第三空间对应所述瓦斯隧道的仰拱设置;The safe operation isolation protection system for a gas tunnel according to any one of claims 1 to 5, wherein the water vapor discharge space includes a first space and a second space and a third space respectively connected to the first space, the first space corresponds to the arch waist setting of the gas tunnel, the second space corresponds to the arch setting of the gas tunnel, and the third space corresponds to the invert setting of the gas tunnel;所述水气分离系统包括:The water-gas separation system comprises:瓦斯排放管路,所述排放管路沿所述瓦斯隧道的开挖方向安装在所述第二空间;A gas discharge pipeline, the discharge pipeline being installed in the second space along the excavation direction of the gas tunnel;水排放管路,所述水排放管路沿所述瓦斯隧道的开挖方向安装在所述第三空间;以及,a water discharge pipeline, the water discharge pipeline being installed in the third space along the excavation direction of the gas tunnel; and至少两个管路分离机构,至少两个所述管路分离机构沿所述瓦斯隧道的开挖方向间隔安装在所述第一空间内,且各所述管路分离机构的顶端与所述瓦斯排放管路连通,底端与所述水排放管路连通。At least two pipeline separation mechanisms are installed in the first space at intervals along the excavation direction of the gas tunnel, and the top end of each pipeline separation mechanism is connected to the gas discharge pipeline, and the bottom end is connected to the water discharge pipeline.
- 如权利要求6所述的瓦斯隧道安全运营隔离防护系统,其中,各所述管路分离机构包括:The gas tunnel safe operation isolation protection system according to claim 6, wherein each of the pipeline separation mechanisms comprises:第一管路,所述第一管路沿所述瓦斯隧道的开挖方向布置;a first pipeline, wherein the first pipeline is arranged along the excavation direction of the gas tunnel;第二管路,所述第二管路的底端与所述第一管路连通,顶端与所述瓦斯排放管路连通;a second pipeline, wherein the bottom end of the second pipeline is connected to the first pipeline, and the top end of the second pipeline is connected to the gas discharge pipeline;第三管路,所述第三管路的顶端与所述第一管路连通,底端与所述水排放管路连通,所述第三管路远离所述第一管路的位置向下弯折形成防漏段,所述防漏段的高度低于所述第三管路与所述第一管路的连通处。A third pipeline, the top end of the third pipeline is connected to the first pipeline, and the bottom end is connected to the water discharge pipeline. The third pipeline is bent downward away from the first pipeline to form a leak-proof section, and the height of the leak-proof section is lower than the connection point between the third pipeline and the first pipeline.
- 如权利要求7所述的瓦斯隧道安全运营隔离防护系统,其中,所述防漏段设置有导管,所述导管的底端与所述防漏段连通,顶端与所述水排放管路连通。The gas tunnel safe operation isolation and protection system as described in claim 7, wherein the leak-proof section is provided with a conduit, the bottom end of the conduit is connected to the leak-proof section, and the top end is connected to the water discharge pipeline.
- 如权利要求8所述的瓦斯隧道安全运营隔离防护系统,其中,所述导管的顶部不低于所述第三管路与所述第一管路的连通处。The gas tunnel safe operation isolation and protection system as described in claim 8, wherein the top of the conduit is not lower than the connecting point between the third pipeline and the first pipeline.
- 如权利要求1至5中任一项所述的瓦斯隧道安全运营隔离防护系统,其中,所述第一隔离层的径向宽度至少为6m。The gas tunnel safe operation isolation and protection system according to any one of claims 1 to 5, wherein the radial width of the first isolation layer is at least 6m.
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JP2005179891A (en) * | 2003-12-16 | 2005-07-07 | Kfc Ltd | Construction method of tunnel lining concrete |
CN104989418A (en) * | 2015-04-02 | 2015-10-21 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel structure for gas tunnel |
CN107701224A (en) * | 2017-11-20 | 2018-02-16 | 中铁第四勘察设计院集团有限公司 | One kind is used to that in gas tunnel gas-water separation, partition security exhaust system can be safeguarded |
CN216894451U (en) * | 2022-01-21 | 2022-07-05 | 中铁九局集团第七工程有限公司 | Gas anti-seepage isolation structure in high gas tunnel region of goaf |
CN116006244A (en) * | 2022-12-29 | 2023-04-25 | 中海建筑有限公司 | Safety operation isolation protection system for gas tunnel |
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JP2005179891A (en) * | 2003-12-16 | 2005-07-07 | Kfc Ltd | Construction method of tunnel lining concrete |
CN104989418A (en) * | 2015-04-02 | 2015-10-21 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel structure for gas tunnel |
CN107701224A (en) * | 2017-11-20 | 2018-02-16 | 中铁第四勘察设计院集团有限公司 | One kind is used to that in gas tunnel gas-water separation, partition security exhaust system can be safeguarded |
CN216894451U (en) * | 2022-01-21 | 2022-07-05 | 中铁九局集团第七工程有限公司 | Gas anti-seepage isolation structure in high gas tunnel region of goaf |
CN116006244A (en) * | 2022-12-29 | 2023-04-25 | 中海建筑有限公司 | Safety operation isolation protection system for gas tunnel |
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