CN112554948A - Harmful gas monitoring system for tunnel excavation - Google Patents
Harmful gas monitoring system for tunnel excavation Download PDFInfo
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- CN112554948A CN112554948A CN202011464980.2A CN202011464980A CN112554948A CN 112554948 A CN112554948 A CN 112554948A CN 202011464980 A CN202011464980 A CN 202011464980A CN 112554948 A CN112554948 A CN 112554948A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21F17/18—Special adaptations of signalling or alarm devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The invention relates to a harmful gas monitoring system for tunnel excavation, which comprises a formation gas occurrence state advanced prediction unit, a construction space gas distribution state monitoring unit in front of a working face and a tunnel wall surface gas flux monitoring unit; the formation gas occurrence state advanced forecasting unit monitors the occurrence state of gas in the formation in front of the excavation working face in real time and carries out sampling analysis monitoring at regular intervals; a gas distribution state monitoring unit of a construction space in front of a working face carries out real-time online monitoring on the concentration of harmful gas in air in a tunnel space; the tunnel wall surface gas flux monitoring unit monitors and analyzes the gas flux of the set measuring points on the tunnel wall surface in real time and periodically. The invention can monitor the harmful gas condition in the tunnel excavation process through the harmful gas-containing stratum, master the harmful gas distribution state in the excavation process in real time, know the environment where workers are in construction and ensure the smooth and safe development of engineering construction.
Description
Technical Field
The invention relates to the technical field of tunnel construction engineering, in particular to a harmful gas monitoring system for tunnel excavation.
Background
Deep-bed rock mass contains not only groundwater but also possibly various gases such as CH4、CO2、H2S and the like. Many of these gases are toxic and can have adverse effects on the body if exposed to such gases for extended periods of time. Therefore, in deep underground engineering (such as deep tunnel engineering, underground mining engineering and the like), when the excavation engineering passes through a stratum containing harmful gas, the harmful gas is monitored in real time, the concentration of the harmful gas in the construction environment is not more than an early warning value, and the personal safety of workers can be ensured, so that the smooth and safe operation of the underground engineering is ensured.
For monitoring harmful gas in the process of deep stratum tunnel excavation, mature technical means and equipment such as a stratum gas pressure determinator, a stratum gas component analyzer, a stratum gas flux analyzer, a gas component online detection system and the like exist at present. However, a complete harmful gas monitoring system in the tunnel excavation process is not formed at present, the knowledge and experience come from individual engineering cases, and a standard technical system is not formed.
Disclosure of Invention
The invention aims to provide a harmful gas monitoring system for tunnel excavation, which can monitor the condition of harmful gas in the tunnel excavation process of a stratum containing the harmful gas, master the distribution state of the harmful gas in the excavation process in real time, know the environment where workers are in construction and ensure the smooth and safe development of engineering construction.
The technical scheme adopted by the invention is as follows:
harmful gas monitoring system of tunnel excavation, its characterized in that:
the system comprises a formation gas occurrence state advanced prediction unit, a construction space gas distribution state monitoring unit in front of a working face and a tunnel wall gas flux monitoring unit;
the formation gas occurrence state advanced forecasting unit monitors the occurrence state of gas in the formation in front of the excavation working face in real time and carries out sampling analysis monitoring at regular intervals;
a gas distribution state monitoring unit of a construction space in front of a working face carries out real-time online monitoring on the concentration of harmful gas in air in a tunnel space;
the tunnel wall surface gas flux monitoring unit monitors and analyzes the gas flux of the set measuring points on the tunnel wall surface in real time and periodically.
The formation gas occurrence state advanced prediction unit comprises an advanced prediction drilling assembly, a high-pressure sleeve assembly, a temperature and pressure sensor assembly and a sampling analysis assembly;
the high-voltage bushing assembly is arranged in the advanced forecasting drilling assembly, and the temperature and pressure sensor assembly and the sampling analysis assembly are arranged at the end part of the high-voltage bushing assembly.
The advanced forecasting drilling assembly is a drilling hole drilled from the face to the stratum in front of the face and is used for communicating pore gas in the stratum in front of the face;
the high-pressure sleeve assembly is a high-pressure plastic pipe and is used for supporting a rock mass on the wall surface of a drilled hole and preventing the drilled hole from collapsing and blocking;
the temperature and pressure sensor assembly is a temperature sensor and is used for measuring the temperature of gas in the drill hole;
the sampling analysis assembly is a sampling port and sampling equipment for taking gas samples from the borehole.
The monitoring unit for the gas distribution state of the construction space in front of the working face comprises a gas sensor assembly, a cable assembly, a gas monitoring data acquisition and processing assembly and a gas monitoring control center assembly;
the gas sensor assembly is arranged above the two side wall surfaces of the tunnel and is connected with the gas monitoring data acquisition and processing assembly in the gas monitoring control center assembly through the cable assembly.
The gas sensor component is a gas sensor and is used for monitoring the pressure of gas in real time;
the gas monitoring data acquisition and processing component is a computer, a data acquisition card and data acquisition software and is used for acquiring data of the gas sensor in real time;
the gas monitoring control center component is a gas monitoring control room and is mainly a working room for monitoring gas components and concentration in real time.
The tunnel wall gas flux monitoring unit comprises a gas flux instrument assembly, and is installed on the wall surface of the tunnel and is 0.5 m away from the ground.
The gas flux meter component is a gas flux meter and is used for measuring the gas flux of the wall surface of the tunnel.
The invention has the following advantages:
1. the system has the advantages of simple principle, clear structure and comprehensive functions, and can realize omnibearing monitoring on harmful gas in the tunnel;
2. the technology and equipment adopted by the system have high maturity, convenient equipment installation and operation and accurate and reliable result, the monitoring result can reduce the safety risk of the excavation construction of the harmful gas-containing tunnel, thereby providing powerful guarantee for the smooth construction, and the system has wide engineering application prospect.
In a word, the invention overcomes the defect of incomplete system of the existing harmful gas monitoring method for tunnel excavation, provides a complete set of harmful gas monitoring system for tunnel excavation, is used as a complete set of monitoring system, has comprehensive functions, considers various available monitoring technologies and means, carries out multidirectional monitoring on harmful gas in the tunnel excavation process of a harmful gas stratum, is beneficial to mastering the occurrence and distribution characteristics of the harmful gas, reduces the tunnel excavation construction risk, provides guarantee for the smooth progress of the tunnel excavation engineering of the harmful gas stratum, and has good engineering application prospect.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
The labels in the figure are: 1.1-advanced forecasting drilling assembly; 1.2-high pressure sleeve assembly; 1.3-temperature and pressure sensor assembly; 1.4-a sample analysis component; 2.1 — a gas sensor assembly; 2.2-cable assembly; 2.3 — gas monitoring control center components; 2.4-gas monitoring data acquisition and processing assembly; 3.1 — gas flux assembly.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
The invention relates to a harmful gas monitoring system for tunnel excavation, which comprises a formation gas occurrence state advanced prediction unit, a construction space gas distribution state monitoring unit in front of a working face and a tunnel wall surface gas flux monitoring unit, wherein the formation gas occurrence state advanced prediction unit is used for predicting the formation gas occurrence state of a tunnel; the formation gas occurrence state advanced forecasting unit monitors the occurrence state of gas in the formation in front of the excavation working face in real time and carries out sampling analysis monitoring at regular intervals; a gas distribution state monitoring unit of a construction space in front of a working face carries out real-time online monitoring on the concentration of harmful gas in air in a tunnel space; the tunnel wall surface gas flux monitoring unit monitors and analyzes the gas flux of the set measuring points on the tunnel wall surface in real time and periodically.
The formation gas occurrence state advanced prediction unit comprises an advanced prediction drilling assembly 1.1, a high-voltage sleeve assembly 1.2, a temperature and pressure sensor assembly 1.3 and a sampling analysis assembly 1.4; the high-pressure sleeve assembly 1.2 is arranged in the advanced forecasting drilling assembly 1.1, and the temperature and pressure sensor assembly 1.3 and the sampling analysis assembly 1.4 are arranged at the end part of the high-pressure sleeve assembly 1.2. The advanced forecasting drilling assembly 1.1 refers to a drilling hole drilled from the face to the stratum in front of the face and used for communicating pore gas in the stratum in front of the face. The high-pressure sleeve assembly 1.2 is specifically a high-pressure plastic pipe and is used for supporting a rock mass on the wall surface of a drilled hole and preventing the drilled hole from collapsing and blocking. The temperature and pressure sensor assembly 1.3 is specifically a temperature sensor that measures the temperature of the gas in the borehole (formation). The sampling analysis assembly 1.4 is specifically referred to as a sampling port and sampling device for taking gas samples from a borehole.
The monitoring unit for the gas distribution state of the construction space in front of the working face comprises a gas sensor assembly 2.1, a cable assembly 2.2, a gas monitoring data acquisition and processing assembly 2.4 and a gas monitoring control center assembly 2.3; the gas sensor assembly 2.1 is installed above two side wall surfaces of the tunnel and is connected with the gas monitoring data acquisition and processing assembly 2.4 in the gas monitoring control center assembly 2.3 through the cable assembly 2.2. The gas sensor assembly 2.1 is specifically a gas sensor for monitoring the pressure of a gas in real time. The gas monitoring data acquisition and processing component 2.4 specifically refers to a computer, a data acquisition card and data acquisition software and is used for acquiring data of the gas sensor in real time. The gas monitoring control center component 2.3 specifically refers to a gas monitoring control room, which is a working room mainly used for monitoring gas components and concentration in real time.
The tunnel wall gas flux monitoring unit comprises a gas flux instrument assembly 3.1 which is arranged on the wall surface of the tunnel and has the height of 0.5 meter from the ground. The gas flux meter module 3.1 is specifically a gas flux meter, which measures the gas flux on the tunnel wall.
The invention overcomes the practical problem that the existing available system monitoring method is lacked in the harmful gas monitoring process in the deep stratum tunnel excavation process, meets the harmful gas monitoring requirement when the deep stratum tunnel excavation passes through the harmful gas-containing stratum, and is used as a complete monitoring system which integrates various monitoring technologies and means such as advance prediction of stratum gas occurrence state, monitoring of gas distribution state of construction space in front of a working face, monitoring of gas flux on the wall surface of a tunnel and the like. The system can comprehensively master occurrence and distribution states of harmful gas in the construction process in real time, and is favorable for ensuring that engineering is carried out under the condition that no risk of harmful gas exists. The system has the advantages of simple principle, clear structure, high maturity of technology and equipment, convenient system installation and operation, accurate and reliable result and wide application prospect.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.
Claims (7)
1. Harmful gas monitoring system of tunnel excavation, its characterized in that:
the system comprises a formation gas occurrence state advanced prediction unit, a construction space gas distribution state monitoring unit in front of a working face and a tunnel wall gas flux monitoring unit;
the formation gas occurrence state advanced forecasting unit monitors the occurrence state of gas in the formation in front of the excavation working face in real time and carries out sampling analysis monitoring at regular intervals;
a gas distribution state monitoring unit of a construction space in front of a working face carries out real-time online monitoring on the concentration of harmful gas in air in a tunnel space;
the tunnel wall surface gas flux monitoring unit monitors and analyzes the gas flux of the set measuring points on the tunnel wall surface in real time and periodically.
2. The harmful gas monitoring system for tunnel excavation according to claim 1, wherein:
the formation gas occurrence state advanced prediction unit comprises an advanced prediction drilling assembly (1.1), a high-voltage sleeve assembly (1.2), a temperature and pressure sensor assembly (1.3) and a sampling analysis assembly (1.4);
the high-pressure sleeve assembly (1.2) is arranged in the advanced forecasting drilling assembly (1.1), and the temperature and pressure sensor assembly (1.3) and the sampling analysis assembly (1.4) are installed at the end part of the high-pressure sleeve assembly (1.2).
3. The harmful gas monitoring system for tunnel excavation according to claim 2, wherein:
the advance forecasting drilling component (1.1) is a drilling hole drilled from the face to the stratum in front of the face and is used for communicating pore gas in the stratum in front of the face;
the high-pressure sleeve assembly (1.2) is a high-pressure plastic pipe and is used for supporting a rock mass on the wall surface of a drilled hole and preventing the drilled hole from collapsing and blocking;
the temperature and pressure sensor assembly (1.3) is a temperature sensor and is used for measuring the temperature of gas in the drill hole;
the sampling analysis assembly (1.4) is a sampling port and sampling device for taking gas samples from a borehole.
4. The harmful gas monitoring system for tunnel excavation according to claim 3, wherein:
the monitoring unit for the gas distribution state of the construction space in front of the working face comprises a gas sensor assembly (2.1), a cable assembly (2.2), a gas monitoring data acquisition and processing assembly (2.4) and a gas monitoring control center assembly (2.3);
the gas sensor assembly (2.1) is arranged above the two side wall surfaces of the tunnel and is connected with the gas monitoring data acquisition and processing assembly (2.4) in the gas monitoring control center assembly (2.3) through the cable assembly (2.2).
5. The harmful gas monitoring system for tunnel excavation according to claim 4, wherein:
the gas sensor component (2.1) is a gas sensor and is used for monitoring the pressure of gas in real time;
the gas monitoring data acquisition and processing component (2.4) is a computer, a data acquisition card and data acquisition software and is used for acquiring data of the gas sensor in real time;
the gas monitoring control center component (2.3) is a gas monitoring control room, and is mainly a working room for monitoring gas components and concentration in real time.
6. The harmful gas monitoring system for tunnel excavation according to claim 5, wherein:
the tunnel wall gas flux monitoring unit comprises a gas flux instrument assembly (3.1) which is arranged on the wall surface of the tunnel and has the height of 0.5 meter from the ground.
7. The harmful gas monitoring system for tunnel excavation according to claim 6, wherein:
the gas flux assembly (3.1) is a gas flux device for measuring the gas flux on the wall of the tunnel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011464980.2A CN112554948B (en) | 2020-12-14 | 2020-12-14 | Harmful gas monitoring system for tunnel excavation |
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| CN202011464980.2A CN112554948B (en) | 2020-12-14 | 2020-12-14 | Harmful gas monitoring system for tunnel excavation |
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| CN112554948A true CN112554948A (en) | 2021-03-26 |
| CN112554948B CN112554948B (en) | 2023-10-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114384228A (en) * | 2021-11-29 | 2022-04-22 | 中铁第一勘察设计院集团有限公司 | Method for surveying harmful gas of non-coal formation tunnel in geological complex region |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571044A (en) * | 2009-06-16 | 2009-11-04 | 中铁一局集团有限公司 | Subway shield gas tunnel construction method |
| CN102691523A (en) * | 2012-06-21 | 2012-09-26 | 中铁二十一局集团有限公司 | Harmful gas remote digital intelligent monitoring and early warning method and system for underground engineering |
| CN103835743A (en) * | 2012-11-23 | 2014-06-04 | 西安众智惠泽光电科技有限公司 | Ventilation control system for tunnel face |
| CN103835763A (en) * | 2012-11-23 | 2014-06-04 | 西安众智惠泽光电科技有限公司 | Automatic alarm system used for long tunnel construction |
| CN104316105A (en) * | 2014-10-14 | 2015-01-28 | 苏州德鲁森自动化系统有限公司 | Tunnel environment monitoring system |
-
2020
- 2020-12-14 CN CN202011464980.2A patent/CN112554948B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571044A (en) * | 2009-06-16 | 2009-11-04 | 中铁一局集团有限公司 | Subway shield gas tunnel construction method |
| CN102691523A (en) * | 2012-06-21 | 2012-09-26 | 中铁二十一局集团有限公司 | Harmful gas remote digital intelligent monitoring and early warning method and system for underground engineering |
| CN103835743A (en) * | 2012-11-23 | 2014-06-04 | 西安众智惠泽光电科技有限公司 | Ventilation control system for tunnel face |
| CN103835763A (en) * | 2012-11-23 | 2014-06-04 | 西安众智惠泽光电科技有限公司 | Automatic alarm system used for long tunnel construction |
| CN104316105A (en) * | 2014-10-14 | 2015-01-28 | 苏州德鲁森自动化系统有限公司 | Tunnel environment monitoring system |
Non-Patent Citations (1)
| Title |
|---|
| 杨曼等: "季家坡隧道易燃气体监测分析及其安全对策", 《武汉工程大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114384228A (en) * | 2021-11-29 | 2022-04-22 | 中铁第一勘察设计院集团有限公司 | Method for surveying harmful gas of non-coal formation tunnel in geological complex region |
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| CN112554948B (en) | 2023-10-10 |
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