CN101539029A - Method for partitioning gas tunnels - Google Patents
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- CN101539029A CN101539029A CN200910058843A CN200910058843A CN101539029A CN 101539029 A CN101539029 A CN 101539029A CN 200910058843 A CN200910058843 A CN 200910058843A CN 200910058843 A CN200910058843 A CN 200910058843A CN 101539029 A CN101539029 A CN 101539029A
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Abstract
The invention discloses a method for partitioning gas tunnels. The method is characterized in that based on the exploration of geological conditions of tunnel gas, the six main factors, i.e. absolute gas emission rate, gas pressure, coal structure type, geohydrologic conditions, distance to coal layers and geological structure, are taken into consideration comprehensively, the index of each main factor is quantified, and proposed gas tunnels are partitioned by mathematical models of gas tunnel partition presented by the invention; the method provides a systematic and reliable solution for partitioning the public road and railroad gas tunnels which penetrate through coal measure strata, so that with regards to different work areas with gas, corresponding construction measures can be adopted during the construction of the gas tunnels, thereby effectively preventing gas accidents from happening and ensuring the safety of constructors; and besides, the method saves the cost of construction measures, shortens the construction period and is of great importance to the implementation of engineering.
Description
Technical field
The present invention relates to the gas tunnel technical field of construction, especially a kind of partition method of gas tunnel.
Background technology
The gas tunnel subregion is in the prospective design stage, by different gas pressures, gas bearing capacity, underground water situation with apart from indexs such as coal seam distances, carry out the security partitioning assessment to planning to build the tunnel different parts, promptly the whole wire engineering in tunnel is carried out security partitioning, mark off different gas sections.
" railway gas tunnel technical specification " be being defined as gas tunnel (TB10120-2002): in railway tunnel exploration and the work progress, detect by geological prospecting or construction and to show and have gas in the tunnel that this tunnel should be decided to be gas tunnel.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 gas tunnel 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 four classes.Present low gas work area and high gas work area can judge by absolute gas emission rate, when the gas emission in full work area less than 0.5m
3Be the present low gas work area during/min, more than or equal to 0.5m
3It during/min high gas work area.
This standard has been carried out the work area division according to gas emission to the tunnel, but this method index is too single, and full tunnel gas situation can not describe in a systematic way.Gas tunnel geological conditions complexity, uncertain factor is numerous, and single gas density index can't accurate description to occurring gas position, time, quantity and natural conditions in the tunnel.
Key to the scientific and reasonable division of gas tunnel work area is fully to grasp the distribution in coal seam and the geological structure in tunnel, and analyzing gas can porous approach and scope, thereby determines the scope in gas work area.
In the transport development of development of the West Regions, the gas tunnel that passes through the coal seam can get more and more, in conjunction with the traffic tunnel characteristics, carry out scientific and reasonable sense partitions to planning to build gas tunnel, it is corresponding in design, classification is set up defences in the work progress, effectively Control Engineering investment has important and practical meanings undoubtedly under safing prerequisite.
Summary of the invention
The objective of the invention is to: at the problem of present railway gas tunnel technical specification existence, based on tunnel gas geological conditions prospecting, provide a kind of system reliably, can avoid excessive risk, effectively reduce the gas tunnel partition method of construction of tunnel cost.
A kind of partition method of gas tunnel, step is as follows:
(1) exploration, investigation plan to build the gas emission, gas pressure, coal body structure types, hydrogeological conditions of each section of tunnel, apart from coal seam distance and geological structure;
(2), the gas emission X1 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
When absolute gas emission rate at 0～0.005m
3During/min, get 0～5, when absolute gas emission rate at 0.005～0.5m
3/ min is 5-10, when absolute gas emission rate at 0.5～3m
3During/min, get 10-15, as absolute gas emission rate 〉=3m
3During/min, get 15-20.
(3), the gas pressure X2 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
When gas pressure＜0.15MPa, get 0～5, when gas pressure gets 5～10 at 0.15～0.35MPa,, get 10-15 when gas pressure during at 0.35～0.74MPa, when gas pressure＞0.74MPa, get 15～20.
(4), the coal body structure types X3 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
When the coal body structure types is the primary structure coal, get 0～5, when the coal body structure types is cracked coal, get 5-10, when the coal body structure types is granulated coal, get 10～15, when the coal body structure types is rotten rib coal, get 15～20.
(5), the hydrogeological conditions X4 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
When underground aqueous condition is flowing water/water burst, get 0～5, when underground aqueous condition when dripping, get 5～10, when underground aqueous condition when being moistening, get 10～15, when underground aqueous condition when being dry, get 15～20.
(6) according to the prospecting data of planning to build each section of tunnel that obtains, value is carried out far from coal seam distance X 5 in the work area of each section of tunnel;
When the distance＞20m of distance coal seam, get 0～5, when distance coal seam distance is 10～20m, get 5～10, when distance coal seam distance is 2～10m, get 10～15, distance is when the distance coal seam＜during 2m, get 15～20.
(7), the geological structure X6 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
During for structure is arranged but for pressure property or the pressure property turned round, get 0～5 with the coal seam degree when being communicated with the work area, when being vertical stratum between work area and coal seam, get 5～10,, get 10～15, when extensional structure is communicated with, get 15～20 when between work area and coal seam suitable layer when being communicated with.
(8) with the geological 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 subregion Mathematical Modeling of proposition: GTZ=1.2X
1+ 1.2X
2+ 0.8X
3+ 0.75X
4+ 0.9X
5+ 1.15X
6, wherein GTZ represents gas tunnel subregion index.
(9), set up the gas tunnel security partitioning index system that this plans to build each section of tunnel according to the result of calculation of GTZ:
When the GTZ value that calculates is 0～30, this plans to build the work area, tunnel for there not being the gas work area substantially, when the GTZ calculated value is 30～60, this plans to build the work area, tunnel is the present low gas work area, when the GTZ calculated value is 60～90, this plans to build the work area, tunnel is high gas work area, and when the GTZ calculated value was 90～120, this plans to build the work area, tunnel was the outstanding work area of gas.
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 Modeling that proposes gas tunnel is carried out subregion, with the digitlization of various coalbed gas geology feature, for passing through the highway of coal measure strata, the railway gas tunnel provides a kind of system of subregion reliable method, make in the gas tunnel work progress, take corresponding Construction Countermeasures and technical measures at different gas work area, effectively avoid gas accident to take place, guarantee constructor's safety; Simultaneously, saved the working measure expense, the reduction of erection time, significant to engineering construction.
Description of drawings
Fig. 1 is the partition method flow chart of gas tunnel of the present invention.
Fig. 2 is the subregion evaluation criterion table of the gas tunnel of the present invention's proposition.
Fig. 3 is by adopting the inventive method that the subregion evaluation table is done in each work area, purple Ping Pu tunnel.
The specific embodiment
The partition method of gas tunnel of the present invention, undertaken by following step:
(1) exploration, investigation plan to build the gas emission, gas pressure, coal body structure types, hydrogeological conditions of each section of tunnel, apart from coal seam distance and geological structure, wherein:
1. gas emission X1
Gas to the harm of tunnel construction be mainly gas near face in the new excavation space gather and consequently suffocate, consequence such as blast, the principal element that influence is gathered is the size of gas emission, and the gas emission in the coal seam is the controlling indicator of subregion in the tunnel so choose.
2. gas pressure X2
What of gas bearing capacity are gas pressure influence on the one hand, also are on the other hand to differentiate the important evidence whether coal seam has outburst hazard and formulate the gas preventing and control scheme.
3. coal body structure types X3
The coal body structure is meant granular size, morphological feature and the correlation thereof of each ingredient of coal seam.With reference to the sorting technique of tectonite in the geology, whether the coal body structure is by suffering the degree of tectonic stress destruction and destruction can be divided into 4 types in primary structure coal, cracked coal, granulated coal and rotten rib coal etc.
4. hydrogeological conditions X4
Tunnel different parts underground water situation can reduce the gas bearing capacity of corresponding site.
5. apart from coal seam distance X 5
Under the identical situation of other geological environment condition, how much gas bearing capacity has direct relation with distance coal seam distance in the stratum.
6. the tunnel passes through structure X6
With the important indicator of above-mentioned geologic parameter as the gas tunnel security partitioning;
(2), the gas emission X1 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
When absolute gas emission rate at 0～0.005m
3During/min, get 0～5, when absolute gas emission rate at 0.005～0.5m
3/ min is 5-10, when absolute gas emission rate at 0.5～3m
3During/min, get 10～15, as absolute gas emission rate 〉=3m
3During/min, get 15～20.
(3), the gas pressure X2 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
When gas pressure＜0.15MPa, get 0～5, when gas pressure gets 5～10 at 0.15～0.35MPa,, get 10～15 when gas pressure during at 0.35～0.74MPa, when gas pressure＞0.74MPa, get 15～20.
(4), the coal body structure types X3 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
When the coal body structure types is the primary structure coal, get 0～5, when the coal body structure types is cracked coal, get 5～10, when the coal body structure types is granulated coal, get 10～15, when the coal body structure types is rotten rib coal, get 15～20.
(5), the hydrogeological conditions X4 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
When underground aqueous condition is flowing water/water burst, get 0～5, when underground aqueous condition when dripping, get 5～10, when underground aqueous condition when being moistening, get 10～15, when underground aqueous condition when being dry, get 15～20.
(6) according to the prospecting data of planning to build each section of tunnel that obtains, value is carried out far from coal seam distance X 5 in the work area of each section of tunnel;
When the distance＞20m of distance coal seam, get 0～5, when distance coal seam distance is 10～20m, get 5～10, when distance coal seam distance is 2～10m, get 10～15, distance is when the distance coal seam＜during 2m, get 15～20.
(7), the geological structure X6 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
During for structure is arranged but for pressure property or the pressure property turned round, get 0～5 with the coal seam degree when being communicated with the work area, when being vertical stratum between work area and coal seam, get 5～10,, get 10～15, when extensional structure is communicated with, get 15～20 when between work area and coal seam suitable layer when being communicated with.
(8) with the geological 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 subregion Mathematical Modeling of proposition: GTZ=1.2X
1+ 1.2X
2+ 0.8X
3+ 0.75X
4+ 0.9X
5+ 1.15X
6, wherein GTZ represents gas tunnel subregion index, and its numerical value is big more, and this work area gas is high more, easy more generation gas accident;
(9), set up the gas tunnel security partitioning index system that this plans to build each section of tunnel according to the result of calculation of GTZ:
When the GTZ value that calculates is 0～30, this plans to build the work area, tunnel for there not being the gas work area substantially, when the GTZ calculated value is 30～60, this plans to build the work area, tunnel is the present low gas work area, when the GTZ calculated value is 60～90, this plans to build the work area, tunnel is high gas work area, and when the GTZ calculated value was 90～120, this plans to build the work area, tunnel was the outstanding work area of gas.
With said method China purple Ping Pu tunnel is carried out subregion, the results are shown in each district's subregion evaluation table of doing of purple Ping Pu tunnel shown in Figure 3, as can be seen from Figure 3, judgement schematics scoring gained is the result conform to actual fully, thereby this method can be carried out the division of different gas work area to gas tunnel in the prospective design stage.Enter construction period, can utilize the in-situ data actual measurement to adjust according to formula as gas emission, gas pressure etc. again, one side is verified previous work, on the other hand the special circumstances that may occur is in time adjusted.
Claims (1)
1, a kind of partition method of gas tunnel, step is as follows:
(1) exploration, investigation plan to build the gas emission, gas pressure, coal body structure types, hydrogeological conditions of each section of tunnel, apart from coal seam distance and geological structure;
(2), the gas emission X1 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
When absolute gas emission rate at 0～0.005m
3During/min, get 0～5, when absolute gas emission rate at 0.005～0.5m
3/ min is 5～10, when absolute gas emission rate at 0.5～3m
3During/min, get 10～15, as absolute gas emission rate 〉=3m
3During/min, get 15～20.
(3), the gas pressure X2 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
When gas pressure＜0.15MPa, get 0～5, when gas pressure gets 5～10 at 0.15～0.35MPa,, get 10-15 when gas pressure during at 0.35～0.74MPa, when gas pressure＞0.74MPa, get 15～20.
(4), the coal body structure types X3 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
When the coal body structure types is the primary structure coal, get 0～5, when the coal body structure types is cracked coal, get 5～10, when the coal body structure types is granulated coal, get 10～15, when the coal body structure types is rotten rib coal, get 15～20.
(5), the hydrogeological conditions X4 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
When underground aqueous condition is flowing water/water burst, get 0～5, when underground aqueous condition when dripping, get 5～10, when underground aqueous condition when being moistening, get 10-15, when underground aqueous condition when being dry, get 15～20.
(6) according to the prospecting data of planning to build each section of tunnel that obtains, value is carried out far from coal seam distance X 5 in the work area of each section of tunnel;
When the distance＞20m of distance coal seam, get 0～5, when distance coal seam distance is 10～20m, get 5～10, when distance coal seam distance is 2～10m, get 10～15, distance is when the distance coal seam＜during 2m, get 15～20.
(7), the geological structure X6 of each section of tunnel is carried out value according to the prospecting data of planning to build each section of tunnel that obtains;
During for structure is arranged but for pressure property or the pressure property turned round, get 0～5 with the coal seam degree when being communicated with the work area, when being vertical stratum between work area and coal seam, get 5～10,, get 10～15, when extensional structure is communicated with, get 15～20 when between work area and coal seam suitable layer when being communicated with.
(8) with the geological 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 subregion Mathematical Modeling of proposition: GTZ=1.2X
1+ 1.2X
2+ 0.8X
3+ 0.75X
4+ 0.9X
5+ 1.15X
6, wherein GTZ represents gas tunnel subregion index.
(9), set up the gas tunnel security partitioning index system that this plans to build each section of tunnel according to the result of calculation of GTZ:
When the GTZ value that calculates is 0～30, this plans to build the work area, tunnel is non-gas work area, when the GTZ calculated value is 30～60, this plans to build the work area, tunnel is the present low gas work area, when the GTZ calculated value is 60～90, this plans to build the work area, tunnel is high gas work area, and when the GTZ calculated value was 90～120, this plans to build the work area, tunnel was the outstanding work area of gas.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656311A (en) * | 2017-09-11 | 2018-02-02 | 河南理工大学 | Coalbed gas geology fault network complexity evaluation method based on coalbed gas geology overall target |
| CN109558607A (en) * | 2017-09-25 | 2019-04-02 | 中铁二院工程集团有限责任公司 | Railway tunnel gas level determines method |
| CN110863858A (en) * | 2019-11-13 | 2020-03-06 | 中铁十局集团有限公司 | Outburst prevention control program and outburst prevention method for high-pressure harmful gas of non-coal-series stratum tunnel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693675B (en) * | 2005-06-06 | 2010-07-28 | 杨光良 | Full automatic coal mine gas prewarning explosion-proof system |
| CN100387806C (en) * | 2005-08-05 | 2008-05-14 | 郑州煤炭工业(集团)有限责任公司 | Gas preventing and control navigation system for coal mine production mine |
-
2009
- 2009-04-03 CN CN2009100588436A patent/CN101539029B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656311A (en) * | 2017-09-11 | 2018-02-02 | 河南理工大学 | Coalbed gas geology fault network complexity evaluation method based on coalbed gas geology overall target |
| CN109558607A (en) * | 2017-09-25 | 2019-04-02 | 中铁二院工程集团有限责任公司 | Railway tunnel gas level determines method |
| CN110863858A (en) * | 2019-11-13 | 2020-03-06 | 中铁十局集团有限公司 | Outburst prevention control program and outburst prevention method for high-pressure harmful gas of non-coal-series stratum tunnel |
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