CN102168531A - Coupling predication method of outburst risk multivariate information of gas coal and gas - Google Patents
Coupling predication method of outburst risk multivariate information of gas coal and gas Download PDFInfo
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- CN102168531A CN102168531A CN2011100774653A CN201110077465A CN102168531A CN 102168531 A CN102168531 A CN 102168531A CN 2011100774653 A CN2011100774653 A CN 2011100774653A CN 201110077465 A CN201110077465 A CN 201110077465A CN 102168531 A CN102168531 A CN 102168531A
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- 239000003245 coal Substances 0.000 title claims abstract description 67
- 230000008878 coupling Effects 0.000 title claims abstract description 21
- 238000010168 coupling process Methods 0.000 title claims abstract description 21
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005520 cutting process Methods 0.000 claims abstract description 12
- 238000003795 desorption Methods 0.000 claims abstract description 12
- 238000005553 drilling Methods 0.000 claims description 21
- 238000009826 distribution Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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Abstract
The invention provides a coupling predication method of outburst risk multivariate information of gas coal and gas. In the method, a multi-index coupling predicting model is built for predicting the outburst risks of coal and gas by coupling original gas pressure of a coal layer, critical fracture gas pressure of a coal sample, mining influences and cutting gas desorption index and the like; the outburst risk information of coal and gas can be captured and collected fully; the multivariate information coupling prediction overcomes the shortages that the single-index information collection is incomplete and cause accurate prediction; and by the method disclosed in the invention, the accuracy for predicting the outburst risks of coal and gas is improved.
Description
Technical field
The present invention relates to a kind of Forecasting Methodology of gas outburst risk, especially a kind of gas moulded coal and gas outburst risk multiple information coupling Forecasting Methodology that is applicable to channel of coal mining working surface.
Background technology
The outstanding disaster of coal and gas is to cause the dead group of mine group to hinder one of major casualty, the accurately generation of forecasting coal and effectively prevention accident of gas outburst risk.And present coal and gas outburst risk Forecasting Methodology are mainly the single index method, as adopting coal powder quantity of bore S value, drilling cuttings desorption of mash gas index K
1Value, Δ h
2, the boring gas initial velocity q value etc. of gushing out, or these indexs are summarized as empirical formula predict.Because the coal mining geology complicated condition, these indexs can not reflect coal and gas outburst risk comprehensively, and these indexs do not realize coupling prediction truly.Therefore, accurately low index coal and gas burst accident usually appear in forecasting coal and gas outburst risk, cause huge obstacle to the colliery safety in production.Studies show that, soft coal body is adsorption equilibrium under specific gas pressure, may be destroyed when unexpected reduction gas pressure, therefore can come forecasting coal and gas outburst risk by coal body critical fracture gas pressure, and can with the prediction that is coupled of the original gas pressure in coal seam, mining influence, drilling cuttings desorption of mash gas index, improve forecasting accuracy.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of gas moulded coal and gas outburst risk multiple information coupling Forecasting Methodology, by the original gas pressure in coal seam, coal sample critical fracture gas pressure, mining influence and drilling cuttings desorption of mash gas index are coupled, energy is supplementary set coal and coal and gas outburst danger information fully, and it is more accurate to predict the outcome.
Technical scheme: gas moulded coal of the present invention and gas outburst risk multiple information coupling Forecasting Methodology:
The original gas pressure P in coal seam in a, the test acceptance region, and coal sample test coal sample critical fracture gas pressure is got at the scene;
B, adopt the boring that construction length in the face forward coal body is no less than 10m from the tunnel, whenever creep into 1m and measure a drilling cuttings desorption of mash gas desired value, write down the desorb index K at 1m place respectively
1, 2m place desorb index K
2, 3m place desorb index K
3..., tending towards stability until the desorb index of measuring, the stable desorb index of this moment is maximum desorb index K
Max
C, according to formula:
Calculate the gas pressure P at 1m place respectively
1, the 2m place gas pressure P
2, the 3m place gas pressure value P
3,
The gas pressure value of the diverse location that d, basis calculate, utilize coal and gas outburst risk multiple information coupling prediction instrument or manual drawing tunnel to adopt interior gas pressure distribution curve of square coal body and critical fracture gas pressure straight line in front, the intersection point of gas pressure distribution curve and critical fracture gas pressure straight line is adopted face apart from the tunnel distance is critical drilling depth;
Then when size was once tunneled in the tunnel less than critical drilling depth, predicting the outcome was safety; When size was once tunneled in the tunnel more than or equal to critical drilling depth, predicting the outcome was danger, finished gas moulded coal and gas outburst risk multiple information coupling prediction.
Beneficial effect: owing to adopt technique scheme, by the original gas pressure in test coal seam, coal sample critical fracture gas pressure, mining influence, drilling cuttings desorption of mash gas index, with these test results be coupled forecasting coal and gas outburst risk, set up the outstanding multiple information coupling of gas moulded coal and gas forecast model, energy is supplementary set coal and gas outburst risk information fully, can overcome that single index supplementary set information is complete, the true shortcoming of forecasting inaccuracy, coal and gas outburst risk forecasting accuracy have been improved, for Safety of Coal Mine Production provides important leverage.The original gas pressure in coal seam, coal sample critical fracture gas pressure are the initial time test simultaneously, in daily forecasting process, only need to test daily prediction index (as coal powder quantity of bore etc.) and just can realize multiple information coupling prediction, forecasting process is simple and convenient, the accuracy height.
Description of drawings
Fig. 1 is gas moulded coal of the present invention and gas outburst risk multiple information coupling Forecasting Methodology schematic diagram;
Among the figure: 1-adopts face in the tunnel; The 2-coal body; 3-gas pressure distribution curve; 4-critical fracture gas pressure straight line; The critical drilling depth of 5-; 6-boring.
The specific embodiment
Below the invention will be further described:
As shown in Figure 1, gas moulded coal of the present invention and gas outburst risk multiple information coupling Forecasting Methodology at first need repeatedly to test coal-bed gas pressure in the acceptance region, and the maximum value that records is defined as the original gas pressure P in coal seam; In acceptance region, get simultaneously coal sample, test coal sample threshold burst pressure.Adopt from the tunnel face 1 forwards in the coal body 2 the construction length be no less than the boring 6 of 10m, creep into whenever that 1m measures drilling cuttings desorption of mash gas index or other can reflect the index of gas pressure or content, write down the desorb index K at 1m place respectively
1, the 2m place desorb index K
2, the 3m place desorb index K
3..., tend towards stability until the desorb index, in test process, when the desorption of mash gas index changes when little also 2m test at interval once, final stable desorb index is maximum desorb index K
Max, as maximum desorb index K
MaxRepresent that outburst hazard is arranged when surpassing the threshold of " control coal and the outstanding regulation of gas ", when no outburst hazard, carry out following continuation and predict.Because drilling cuttings desorption of mash gas index increases with gas pressure, reduce with gas pressure, so drilling cuttings desorption of mash gas index and gas pressure present corresponding relation, maximum drilling cuttings desorption of mash gas index K
MaxThe corresponding original gas pressure P in coal seam; Afterwards according to following formula:
Calculate the gas pressure P at 1m place respectively
1, the 2m place gas pressure P
2, the 3m place gas pressure P
3...Gas pressure value according to the diverse location that calculates, utilize coal and gas outburst risk multiple information coupling prediction instrument or manual drawing tunnel to adopt gas pressure distribution curve 3 and critical fracture gas pressure straight line 4 in face 1 the place ahead coal body 2, the intersection point of gas pressure distribution curve 3 and critical fracture gas pressure straight line 4 is adopted face 1 apart from the tunnel distance is critical drilling depth 5.When size was once tunneled in the tunnel less than critical drilling depth 5, predicting the outcome was safety; When size is once tunneled in the tunnel more than or equal to critical drilling depth 5, predict the outcome and be danger, since in the forecasting process with predictions that is coupled such as the original gas pressure in coal seam, coal sample critical fracture gas pressure and drilling cuttings desorb indexs, also take into account the digging influence simultaneously, realized gas moulded coal and gas outburst risk multiple information coupling prediction.
Claims (1)
1. gas moulded coal and gas outburst risk multiple information coupling Forecasting Methodology is characterized in that:
The original gas pressure P in coal seam in a, the test acceptance region, and coal sample test coal sample critical fracture gas pressure is got at the scene;
B, adopt from the tunnel face (1) forwards in the coal body (2) construction length be no less than the boring (6) of 10m, whenever creep into 1m and measure a drilling cuttings desorption of mash gas desired value, write down the desorb index K at 1m place respectively
1, 2m place desorb desired value K
2, 3m place desorb index K
3..., tending towards stability until the desorb index of measuring, the stable desorb index of this moment is maximum desorb index K
Max
C, according to formula:
Calculate the gas pressure P at 1m place respectively
1, the 2m place gas pressure P
2, the 3m place gas pressure P
3,
The gas pressure value of the diverse location that d, basis calculate, utilize coal and gas outburst risk multiple information coupling prediction instrument or manual drawing tunnel to adopt interior gas pressure distribution curve of face (1) the place ahead coal body (2) (3) and critical fracture gas pressure straight line (4), the intersection point of gas pressure distribution curve (3) and critical fracture gas pressure straight line (4) is adopted face (1) apart from the tunnel distance is critical drilling depth (5);
Then when size was once tunneled in the tunnel less than critical drilling depth (5), predicting the outcome was safety; When size was once tunneled in the tunnel more than or equal to critical drilling depth (5), predicting the outcome was danger, finished gas moulded coal and gas outburst risk multiple information coupling prediction.
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| CN 201110077465 CN102168531B (en) | 2011-03-30 | 2011-03-30 | Coupling predication method of outburst risk multivariate information of gas coal and gas |
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| CN 201110077465 CN102168531B (en) | 2011-03-30 | 2011-03-30 | Coupling predication method of outburst risk multivariate information of gas coal and gas |
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| CN102168531B CN102168531B (en) | 2013-04-03 |
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Cited By (8)
| 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 |
| CN103089305A (en) * | 2013-01-14 | 2013-05-08 | 中国矿业大学(北京) | Risk assessment method for coal and gas outburst of coal beds |
| CN103487250A (en) * | 2013-10-08 | 2014-01-01 | 中国矿业大学(北京) | Coal mining equipment predictive maintenance method based on two-dimensional projection |
| WO2014023111A1 (en) * | 2012-08-08 | 2014-02-13 | 中国矿业大学 | Coal and gas burst risk parameter drilling and predicting integrated method |
| CN105242016A (en) * | 2015-11-04 | 2016-01-13 | 太原理工大学 | Method for predicting coal and gas outburst danger |
| CN108169449A (en) * | 2017-12-07 | 2018-06-15 | 中国矿业大学 | A kind of coal and gas prominent danger local prediction index sensibility determines method |
| RU2741935C1 (en) * | 2020-06-01 | 2021-01-29 | Федеральное Государственное Бюджетное Учреждение Науки Институт Проблем Комплексного Освоения Недр Им. Академика Н.В. Мельникова Российской Академии Наук (Ипкон Ран) | Forecast method of explosive sulfur-containing substances in coal bed |
| CN113446063A (en) * | 2021-08-13 | 2021-09-28 | 中煤科工集团重庆研究院有限公司 | Method for verifying fusion index region of close-range adjacent outburst coal seam |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| RU2741935C1 (en) * | 2020-06-01 | 2021-01-29 | Федеральное Государственное Бюджетное Учреждение Науки Институт Проблем Комплексного Освоения Недр Им. Академика Н.В. Мельникова Российской Академии Наук (Ипкон Ран) | Forecast method of explosive sulfur-containing substances in coal bed |
| CN113446063A (en) * | 2021-08-13 | 2021-09-28 | 中煤科工集团重庆研究院有限公司 | Method for verifying fusion index region of close-range adjacent outburst coal seam |
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