CN101561359A - Grading method for gas tunnel - Google Patents
Grading method for gas tunnel Download PDFInfo
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- CN101561359A CN101561359A CNA2009100588525A CN200910058852A CN101561359A CN 101561359 A CN101561359 A CN 101561359A CN A2009100588525 A CNA2009100588525 A CN A2009100588525A CN 200910058852 A CN200910058852 A CN 200910058852A CN 101561359 A CN101561359 A CN 101561359A
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Abstract
The invention discloses a grading method for a gas tunnel. The grading method is characterized in that: the method comprises the following steps: comprehensively evaluating five key factors of the location of the gas tunnel, namely stratum lithology, a geologic structure, coal seam thickness, tunnel buried depth and hydrogeological conditions; quantizing indexes of the key factors; and grading the gas tunnel to be constructed through a gas tunnel grading index empirical formula. The method provides a systematic and reliable method for the grading evaluation of the tunnel gas in a location stage for a highway or a railway passing through coal measure strata, thereby effectively avoiding the high risk gas tunnel at the early stage of geological location. The pertinent design is carried out on the tunnel inevitably passing through coal seam according to the security level of the tunnel gas. The method has great significance for reducing the whole construction cost.
Description
Technical field
The present invention relates to the gas tunnel technical field of construction, especially relate to a kind of stage division of gas tunnel.
Background technology
Gas is the harmful gas of overflowing in coal rock layer, study the division methods of gas grade in the tunnel and work out corresponding differentiated control technical manual, to exploration, design, the construction of gas tunnel and check and accept most important, can effectively reduce gas accident, make highway, the construction of railway gas tunnel meet the requirement of safe and applicable, advanced technology, economical rationality.
The Ministry of Railways stipulates in " railway gas tunnel technical manual ": " gas tunnel is divided into three kinds in the outstanding tunnel of present low gas tunnel, high gas tunnel and gas, and the type of gas tunnel is pressed the superlative degree in gas work area in the tunnel and determined "; The tunnel gas work area is divided into non-gas work area, present low gas work area, high gas work area, the outstanding work area of gas totally 4 classes.When the gas emission in work area less than 0.5m
3Be the present low gas work area during/min, more than or equal to 0.5m
3Be high gas work area during/min, as long as gas tunnel has a place that outburst danger is arranged, this place the work area be the outstanding work area of gas.
This standard is divided into three kinds with gas tunnel, exploration for gas tunnel, design, the construction and the course of receiving provide technical standard, but, this method is too simple, the actual distribution situation of gas in the tunnel can't be described accurately, in recent years, along with railway in the development of the West Regions process, the transport development of highway, the gas tunnel that passes through the coal seam can get more and more, at building railway, the requirement in highway communication tunnel, the tunnel that will build is carried out science, reasonably gas detects and the safety classification analysis, could be in Tunnel Design, classification is set up defences in the work progress, effectively control engineering investment under safing prerequisite.
Summary of the invention
The objective of the invention is to: at the problem that present railway gas tunnel technical manual exists, provide a kind of system reliable, can avoid excessive risk, effectively reduce the gas tunnel stage division of Tunnel Engineering cost.
The objective of the invention is by a large amount of gas tunnel Engineering Projects analysis both at home and abroad, based on regional coalbed gas geology condition investigation, in the major influence factors of determining that the tunnel gas tax is deposited, migrated, set up gas tunnel classification mathematical model, and set up and realize on the technical foundation of tunnel gas graded index system.
A kind of stage division of gas tunnel, step is as follows:
(1), exploration, investigation plan to build formation lithology, tectonic structure, thickness of coal seam, edpth of tunnel, the hydrogeological condition of each section of tunnel, obtains the geologic information data;
(2), according to exploring the geologic information data of planning to build each section of tunnel that obtain, to the formation lithology X of each section of gas tunnel
1Carry out value:
When the country rock perviousness is medium sand-coarse sand, get 0-5; When being flour sand-fine sand, the country rock perviousness gets 5-10; When the country rock perviousness is limestone, get 10-15; When the country rock perviousness is shale-mud stone, get 15-20;
(3), the geologic information of planning to build each section of tunnel that obtains according to prospecting, the architectonic connective X2 of each section of gas tunnel is carried out value:
When the coal seam is in open structure, get 0-5; When the coal seam is in connective structure, get 5-10; When in the geology structure during no coal seam, get 10-15; When for the sealing seam construction, get 15-20;
(4), according to the geologic information of planning to build each section of tunnel that prospecting obtains, each section coal seam thickness X 3 of gas tunnel is carried out value:
When thickness of coal seam＜0.4m, get 0-5; When thickness of coal seam is 0.4～1.3m, get 5-10; When thickness of coal seam is 1.3-3.5m, get 10-15; When thickness of coal seam＞3.5m, get 15-20;
(5), the geologic information of planning to build each section of tunnel that obtains according to prospecting, the edpth of tunnel X4 of each section of gas tunnel is carried out value:
When edpth of tunnel＜100m, get 0-5; When edpth of tunnel is 100-300m, get 5-10; When edpth of tunnel is 300-500m, get 10-15; When edpth of tunnel＞500m, get 15-20;
(6), the geologic information of planning to build each section of tunnel that obtains according to prospecting, the hydrogeological condition X5 of each section of gas tunnel is carried out value:
As the water yield＞3000m
3During/d, get 0-5; When the water yield is 1000-3000m
3During/d, get 5-10; When the water yield is 100-1000m
3During/d, get 10-15; When the water yield is＜100m
3During/d, get 15-20;
(7), with the tectonic structure value of above-mentioned each section of determining according to the geologic information of each section, substitution the present invention sums up in the gas tunnel classification mathematical model of proposition:
GTC=0.95X
1+ 1.05X
2+ 1.1X
3+ 1.15X
4+ 0.75X
5In, wherein GTC represents gas tunnel safety classification index;
(8), according to the result of calculation of GTC, set up the gas tunnel graded index system that this plans to build each section of tunnel:
When the GTC value that calculates is 0-25, this plans to build the tunnel is no gas tunnel, when the GTC calculated value is 25-50, this plans to build the tunnel is the present low gas tunnel, when the GTC calculated value is 50-75, this plans to build the tunnel is high gas tunnel, and when the GTC calculated value was 75-100, this plans to build the tunnel was the outstanding tunnel of gas.
Last table is the grading evaluation standard scale of the gas tunnel of the present invention's proposition.
Essence effect of the present invention is: owing to cause that the gas tunnel hazard factor is complicated, existing regional factor also has local factor, by from the gas tunnel engineering practice, summing up and the mathematical model that proposes gas tunnel is carried out classification, with the digitizing of various coalbed gas geology feature, the gas tunnel classification experimental formula research tunnel gas problem that provides with the present invention, thereby for passing through the highway of coal measure strata, the gas tunnel classification in railway route selection stage provides reliable scientific basis, make and just can avoid high risk gas tunnel effectively at the initial stage of geology route selection, for the tunnel that unavoidably passes through the coal seam, can design targetedly according to the tunnel gas level of security, be of great significance reducing whole construction costs.
Description of drawings
Fig. 1 is the stage division process flow diagram of gas tunnel of the present invention
Embodiment
The gas tunnel classification is the greatest danger Journal of Sex Research that gas tunnel integral body is carried out, and should consider to influence the principal element of classification, considers that again the engineering construction different times can reconnoitre the geologic information situation of obtaining.
The detection safety classification method of gas tunnel of the present invention, undertaken by following step:
(1), exploration, investigation plan to build formation lithology, tectonic structure, thickness of coal seam, edpth of tunnel, the hydrogeological condition of each section of tunnel, wherein:
1. formation lithology X
1:
The geologic feature of research coal-bearing series and coal seam country rock focuses on them gas is preserved or the loss role; The coal seam country rock is decided by its trapping, permeability to the influence of gas bearing, and in general, when coal roof lithologic is compact and complete rock, during as shale, oil shale, the gas in the coal seam is saved easily; When top board is the rock of porous crack or fragility cranny development, during as conglomerate, sandstone, gas is loss easily just;
2. tectonic structure X2:
Structural belt when the location is a gas dissipation tectonic structure, and this location is the location that outburst danger takes place, and mainly considers the degree of closure of tectonic structure to the coal seam when classification;
3. thickness of coal seam X3:
The size of thickness of coal seam is directly determining the size of gas emission;
4. edpth of tunnel X4:
Edpth of tunnel is dark more, and pressure is big more, and danger is also high more; General with 300m as shallow embedding and buried separatrix, with 500m as buried and super buried separatrix;
5. hydrogeological condition X5:
In the gas tunnel classification stage, this index of hydrogeological condition can consider that from the groundwater run off aspect the big more tunnel gas of groundwater run off is few more;
With the important indicator of above-mentioned geologic parameter as the gas tunnel safety classification;
(2), the geologic information of planning to build each section of tunnel that obtains according to exploration, the formation lithology X1 of each section of gas tunnel is carried out value:
When the country rock perviousness is medium sand-coarse sand, get 0-5; When being flour sand-fine sand, the country rock perviousness gets 5-10; When the country rock perviousness is limestone, get 10-15; When the country rock perviousness is shale-mud stone, get 15-20;
(3), the geologic information of planning to build each section of tunnel that obtains according to prospecting, the architectonic connective X2 of each section of gas tunnel is carried out value:
When the coal seam is in open structure, get 0-5; When the coal seam is in connective structure, get 5-10; When in the geology structure during no coal seam, get 10-15; When for the sealing seam construction, get 15-20;
(4), according to the geologic information of planning to build each section of tunnel that prospecting obtains, each section coal seam thickness X 3 of gas tunnel is carried out value:
When thickness of coal seam＜0.4m, get 0-5; When thickness of coal seam is 0.4～1.3m, get 5-10; When thickness of coal seam is 1.3-3.5m, get 10-15; When thickness of coal seam＞3.5m, get 15-20;
(5), the geologic information of planning to build each section of tunnel that obtains according to prospecting, the edpth of tunnel X4 of each section of gas tunnel is carried out value:
When edpth of tunnel＜100m, get 0-5; When edpth of tunnel is 100-300m, get 5-10; When edpth of tunnel is 300-500m, get 10-15; When edpth of tunnel＞500m, get 15-20;
(6), the geologic information of planning to build each section of tunnel that obtains according to prospecting, the hydrogeological condition X5 of each section of gas tunnel is carried out value:
As the water yield＞3000m
3During/d, get 0-5; When the water yield is 1000-3000m
3During/d, get 5-10; When the water yield is 100-1000m
3During/d, get 10-15; When the water yield is＜100m
3During/d, get 15-20;
(7), with the tectonic structure value of above-mentioned each section of determining according to the geologic information of each section, the present invention sums up in the gas tunnel classification mathematical model of proposition below the substitution:
GTC=0.95X
1+ 1.05X
2+ 1.1X
3+ 1.15X
4+ 0.75X
5, wherein GTC represents gas tunnel safety classification index, its numerical value is big more, and the easy more generation gas accident in tunnel, the hazard of gas tunnel grade is high more;
(8), according to the result of calculation of GTC, set up the gas tunnel safety classification index system that this plans to build each section of tunnel:
When the GTC value that calculates is 0-25, this plans to build the tunnel is no gas tunnel, when the GTC calculated value is 25-50, this plans to build the tunnel is the present low gas tunnel, when the GTC calculated value is 50-75, this plans to build the tunnel is high gas tunnel, and when the GTC calculated value was 75-100, this plans to build the tunnel was the outstanding tunnel of gas.
With said method the existing part gas tunnel of China is carried out the safety detection classification, shown in below the results are shown in to China's part gas tunnel grading evaluation table as a result:
| Numbering | The tunnel | Lithology value (weight 0.95) | Structure value (weight 1.05) | The thick value of coal (weight 1.1) | Buried depth value (weight 1.15) | Hydrology value (weight 0.75) | Value | Classification | The prospective design checking |
| 1 | Zhu's loud, high-pitched sound tunnel | 15 | 12 | 6 | 12 | 15 | 58.5 | High gas | High gas has certain outburst danger |
| Numbering | The tunnel | Lithology value (weight 0.95) | Structure value (weight 1.05) | The thick value of coal (weight 1.1) | Buried depth value (weight 1.15) | Hydrology value (weight 0.75) | Value | Classification | The prospective design checking |
| 2 | The tunnel, green hill | 20 | 15 | 11 | 20 | 15 | 81.1 | Outburst danger is arranged | Serious gas outburst danger is arranged |
| 3 | No. 2, Ceng Jiaping | 12 | 13 | 0 | 15 | 8 | 48.3 | Present low gas | Reconnoitre no gas, the construction present low gas |
| 4 | Water chestnut stone | 8 | 8 | 0 | 12 | 8 | 35.8 | Present low gas | Reconnoitre no gas, the construction present low gas |
| 5 | The Xin Zhai tunnel | 20 | 20 | 8 | 14 | 15 | 76.15 | Outburst danger is arranged | Have serious outstanding |
| 6 | Tunnel on the lock | 10 | 10 | 5 | 8 | 6 | 39.2 | Present low gas | The coal seam is arranged, do not carry gas in the prospecting |
| 7 | Tunnel, coptis root slope | 5 | 10 | 3 | 8 | 8 | 33.75 | Present low gas | The present low gas tunnel |
| 8 | Red Shi Yan tunnel | 2 | 8 | 0 | 16 | 8 | 34.7 | Present low gas | Reconnoitre no gas, the construction present low gas |
| 9 | Tube ditch tunnel, spit of fland | 2 | 8 | 0 | 10 | 12 | 30.8 | Present low gas | Reconnoitre no gas, the construction present low gas |
| 10 | The Yuntai Shan Mountain tunnel | 10 | 20 | 13 | 12 | 7 | 63.85 | High gas | High gas tunnel |
| 11 | Tunnel, logical Chongqing | 17 | 16 | 12 | 20 | 8 | 75.15 | Outburst danger is arranged | Outburst danger is arranged |
| 12 | The Bei Bei tunnel | 15 | 18 | 10 | 10 | 8 | 61.65 | High gas | High gas tunnel |
| 13 | Tunnel, Western Hills level ground | 5 | 13 | 5 | 8 | 9 | 39.85 | Present low gas | The present low gas tunnel |
| 14 | Tunnel, pear tree gulf | 5 | 12 | 5 | 8 | 5 | 35.8 | Present low gas | The present low gas tunnel |
| 15 | Middle tunnel, Liangshan | 15 | 20 | 12 | 9 | 8 | 64.8 | High gas | High gas tunnel |
| 16 | The Mount Jinyun tunnel | 5 | 5 | 2 | 7 | 5 | 24 | Present low gas | The present low gas tunnel |
| 17 | The Huaying hill tunnel | 17 | 18 | 16 | 16 | 7 | 76.3 | Outburst danger is arranged | General outburst danger is arranged |
| 18 | The tunnel, South Mountain | 15 | 18 | 5 | 18 | 8 | 65.35 | High gas | High gas tunnel |
| 19 | The gold hole tunnel | 15 | 15 | 10 | 20 | 8 | 70 | High gas | High gas tunnel |
| 20 | Yuanliangshan Tunnel | 15 | 18 | 6 | 19 | 8 | 67.6 | High gas | High gas tunnel |
| 21 | Yellow careless tunnel | 10 | 10 | 0 | 18 | 7 | 45.95 | Present low gas | Reconnoitre no gas, the construction present low gas |
| 22 | No. 4 tunnels of white sand a small bay in a river | 15 | 10 | 8 | 10 | 8 | 51.05 | High gas | High gas tunnel |
| 23 | The WuLong tunnel | 15 | 12 | 0 | 14 | 12 | 51.95 | High gas | Reconnoitre no gas, the high gas of constructing |
| 24 | The tunnel, Zhenyang | 10 | 10 | 15 | 7 | 10 | 52.05 | High gas | High gas tunnel |
| 25 | Tunnel, Peng River | 5 | 10 | 5 | 15 | 13 | 47.75 | Present low gas | The present low gas tunnel |
| 26 | Pine forest fort tunnel | 10 | 10 | 10 | 5 | 10 | 44.25 | Present low gas | The present low gas tunnel |
| 27 | The tunnel, mountain range of galloping along on horseback | 10 | 10 | 4 | 12 | 8 | 44.2 | Present low gas | The present low gas tunnel |
| 28 | Other rock groove tunnel | 15 | 5 | 3 | 15 | 5 | 43.8 | Present low gas | Reconnoitre no gas, the construction present low gas |
| 29 | Tunnel, Qi Yue mountain | 15 | 10 | 6 | 17 | 4 | 53.9 | High gas | High gas tunnel |
| Numbering | The tunnel | Lithology value (weight 0.95) | Structure value (weight 1.05) | The thick value of coal (weight 1.1) | Buried depth value (weight 1.15) | Hydrology value (weight 0.75) | Value | Classification | The prospective design checking |
| 30 | Tunnel, Eight characters mountain range | 10 | 8 | 4 | 17 | 8 | 47.85 | Present low gas | The present low gas tunnel |
| 31 | Wild three close the tunnel | 10 | 5 | 5 | 20 | 4 | 46.25 | Present low gas | The present low gas tunnel |
| 32 | Tunnel, iron peak mountain | 10 | 15 | 4 | 16 | 10 | 55.55 | High gas | The present low gas tunnel |
| 33 | Divide water tunnel | 10 | 10 | 8 | 10 | 10 | 47.8 | Present low gas | The present low gas tunnel |
| 34 | Fourth Zi Yan tunnel | 15 | 10 | 20 | 8 | 10 | 63.45 | High gas | High gas tunnel |
| 35 | The Fortress Hill tunnel | 13 | 15 | 0 | 12 | 12 | 50.9 | High gas | Reconnoitre no gas, the high gas of constructing |
| 36 | Neolite bealock tunnel | 16 | 16 | 12 | 12 | 10 | 66.5 | High gas | High gas tunnel |
| 37 | Tunnel, new Su Jia stockaded village | 15 | 15 | 6 | 7 | 10 | 52.15 | High gas | High gas tunnel |
| 38 | Tunnel, flood dragon mountain range | 5 | 10 | 8 | 8 | 10 | 40.75 | Present low gas | The present low gas tunnel |
| 39 | Main road Liang Zi tunnel | 10 | 16 | 9 | 18 | 10 | 64.4 | High gas | High gas tunnel |
| 40 | Maple row tunnel | 15 | 10 | 10 | 8 | 10 | 52.45 | High gas | High gas tunnel |
| 41 | Tunnel, LongXi | 10 | 12 | 6 | 17 | 10 | 55.75 | High gas | High gas tunnel |
| 42 | Plum closes the tunnel | 10 | 5 | 5 | 10 | 8 | 37.75 | Present low gas | The present low gas tunnel |
| 43 | Tunnel, plum blossom mountain | 8 | 10 | 4 | 17 | 8 | 48.05 | Present low gas | The present low gas tunnel |
| 44 | Tunnel, rock pin stockaded village | 10 | 15 | 20 | 15 | 10 | 72 | High gas | High gas tunnel |
| 45 | Tunnel, new rock pin stockaded village | 10 | 15 | 20 | 15 | 10 | 72 | High gas | High gas tunnel |
| 46 | Cool breeze a strip of land between hills tunnel | 16 | 10 | 0 | 16 | 6 | 48.6 | Present low gas | Reconnoitre no gas, the construction present low gas |
| 47 | Tunnel, Sun Jia stockaded village | 15 | 10 | 16 | 4 | 10 | 54.45 | High gas | High gas tunnel |
| 48 | The Bai Longshan tunnel | 15 | 10 | 7 | 16 | 10 | 58.35 | High gas | High gas has general outburst danger |
| 49 | Tunnel, He Jia stockaded village | 15 | 20 | 12 | 10 | 12 | 68.95 | High gas | High gas has general outburst danger |
| 50 | Send out the ear tunnel | 20 | 20 | 13 | 9 | 16 | 76.65 | Outburst danger is arranged | General outburst danger is arranged |
| 51 | Family Zhu Qing tunnel | 20 | 15 | 20 | 15 | 9 | 80.75 | Outburst danger is arranged | Serious gas outburst danger |
| 52 | Health ox tunnel | 5 | 10 | 5 | 9 | 8 | 37.1 | Present low gas | The present low gas tunnel |
| 53 | Tunnel, last Qinghe | 18 | 20 | 20 | 10 | 10 | 79.1 | Outburst danger is arranged | Outburst danger is arranged |
| 54 | No. 2 diversion tunnels in shop, purple level ground | 15 | 10 | 10 | 10 | 8 | 53.25 | High gas | High gas tunnel |
| 55 | Tunnel of Wumeng Shan Mountain | 10 | 15 | 20 | 15 | 8 | 70.5 | High gas | High gas tunnel |
| 56 | Tunnel, Yang Jia valley | 10 | 8 | 5 | 6 | 10 | 37.8 | Present low gas | The present low gas tunnel |
| 57 | Eight Pan Ling tunnels | 12 | 10 | 5 | 15 | 10 | 52.15 | High gas | High gas tunnel |
| Numbering | The tunnel | Lithology value (in the power 0.95) | Structure value (weight 1.05) | The thick value of coal (weight 1.1) | Buried depth value (weight 1.15) | Hydrology value (weight 0.75) | Value | Classification | The prospective design checking |
| 58 | Purple Ping Pu tunnel | 15 | 15 | 5 | 16 | 10 | 61.4 | High gas | The prospecting present low gas, the high gas of constructing |
| 59 | The friendship tunnel | 15 | 13 | 8 | 8 | 10 | 53.4 | High gas | High gas tunnel |
| 60 | Longan eyeball tunnel | 15 | 13 | 8 | 9 | 11 | 55.3 | High gas | High gas tunnel |
As can be seen from the above table, estimating each gas tunnel safe class overwhelming majority with the classification mathematical model conforms to actual, have only that two the tunnel evaluations in tunnel and tunnel, iron peak mountain and prospecting are not inconsistent on the lock, gas is not mentioned in the tunnel on the lock in prospecting, but the tunnel passes through coal measure strata on the lock, is certain to run into gas, should be that gas bearing capacity is low, for there not being gas tunnel substantially, the scoring evaluation result is the present low gas tunnel, and is more higher than reality.Tunnel, iron peak mountain evaluation result is high gas tunnel, and the prospecting conclusion is the present low gas tunnel, and is more higher to some extent again than reality.
Find out from the evaluation that existing 60 gas tunnels have been done: the stage division of gas tunnel of the present invention and the gas tunnel classification mathematical model that provides thereof are available, through the prospecting or the on all four tunnel of construction verification up to 91.7%, can carry out the gas grade classification to the tunnel in the route selection stage fully.What deserves to be mentioned is that formula is that the tunnel that passes through coal measure strata is carried out grading evaluation,, in non-coal measure strata, find that in conjunction with the prospecting data this formula of gas could be suitable for if ignore this prerequisite then gas danger all may be estimated out in all tunnels.
Claims (1)
1, a kind of stage division of gas tunnel, step is as follows:
(1), formation lithology, tectonic structure, thickness of coal seam, edpth of tunnel, the hydrogeological condition of each section of tunnel planned to build in exploration, investigation;
(2), according to exploring the geologic information of planning to build each section of tunnel that obtains, to the formation lithology X of each section of gas tunnel
1Carry out value:
When the country rock perviousness is medium sand-coarse sand, get 0～5; When being flour sand-fine sand, the country rock perviousness gets 5～10; When the country rock perviousness is limestone, get 10～15; When the country rock perviousness is shale-mud stone, get 15～20;
(3), the geologic information of planning to build each section of tunnel that obtains according to prospecting, the architectonic connective X2 of each section of gas tunnel is carried out value:
When the coal seam is in open structure, get 0～5; When the coal seam is in connective structure, get 5～10; When in the geology structure during no coal seam, get 10～15; When for the sealing seam construction, get 15～20;
(4), according to the geologic information of planning to build each section of tunnel that prospecting obtains, each section coal seam thickness X 3 of gas tunnel is carried out value:
When thickness of coal seam＜0.4m, get 0～5; When thickness of coal seam is 0.4～1.3m, get 5～10; When thickness of coal seam is 1.3～3.5m, get 10～15; When thickness of coal seam＞3.5m, get 15～20;
(5), the geologic information of planning to build each section of tunnel that obtains according to prospecting, the edpth of tunnel X4 of each section of gas tunnel is carried out value:
When edpth of tunnel＜100m, get 0～5; When edpth of tunnel is 100～300m, get 5～10; When edpth of tunnel is 300～500m, get 10～15; When edpth of tunnel＞500m, get 15～20;
(6), the geologic information of planning to build each section of tunnel that obtains according to prospecting, the hydrogeological condition X5 of each section of gas tunnel is carried out value:
As the water yield＞3000m
3During/d, get 0～5; When the water yield is 1000～3000m
3During/d, get 5～10; When the water yield is 100～1000m
3During/d, get 10～15; When the water yield is＜100m
3During/d, get 15～20;
(7), with the tectonic structure value of above-mentioned each section of determining according to the geologic information of each section, substitution the present invention sums up in the gas tunnel classification mathematical model of proposition:
GTC=0.95X
1+ 1.05X
2+ 1.1X
3+ 1.15X
4+ 0.75X
5In, wherein GTC represents gas tunnel safety classification index;
(8), according to the result of calculation of GTC, set up the gas tunnel graded index system that this plans to build each section of tunnel:
When the GTC value that calculates is 0～25, this plans to build the tunnel is no gas tunnel, when the GTC calculated value is 25～50, this plans to build the tunnel is the present low gas tunnel, when the GTC calculated value is 50～75, this plans to build the tunnel is high gas tunnel, and when the GTC calculated value was 75～100, this plans to build the tunnel was the outstanding tunnel of gas.
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|---|---|---|---|
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705010A (en) * | 2012-05-31 | 2012-10-03 | 中煤科工集团重庆研究院 | Working surface outburst risk evaluation index system analysis method |
| CN103198218A (en) * | 2013-04-01 | 2013-07-10 | 中铁工程设计咨询集团有限公司 | Method and device for assessing risks of close-spaced tunnels on high-speed railway roadbed |
| CN106968675A (en) * | 2017-03-20 | 2017-07-21 | 中铁十五局集团有限公司 | The construction method in gas tunnel goaf |
-
2009
- 2009-04-03 CN CN2009100588525A patent/CN101561359B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705010A (en) * | 2012-05-31 | 2012-10-03 | 中煤科工集团重庆研究院 | Working surface outburst risk evaluation index system analysis method |
| CN102705010B (en) * | 2012-05-31 | 2014-10-29 | 中煤科工集团重庆研究院有限公司 | Working surface outburst risk evaluation index system analysis method |
| CN103198218A (en) * | 2013-04-01 | 2013-07-10 | 中铁工程设计咨询集团有限公司 | Method and device for assessing risks of close-spaced tunnels on high-speed railway roadbed |
| CN103198218B (en) * | 2013-04-01 | 2016-03-30 | 中铁工程设计咨询集团有限公司 | Closely connect tunnel to the methods of risk assessment of high-speed railway subgrade and device |
| CN106968675A (en) * | 2017-03-20 | 2017-07-21 | 中铁十五局集团有限公司 | The construction method in gas tunnel goaf |
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| CN101561359B (en) | 2011-08-10 |
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