Oil flow influence on accuracy of forecasting mine air temperatures

UDK: 628.5:622.276:536.24
DOI: 10.24887/0028-2448-2020-4-98-100
Key words: oil mine, mining, heat sources, temperature conditions, forecast, error
Authors: A.F. Galkin (Ukhta State Technical University, RF, Ukhta), I.V. Kurta (Ukhta State Technical University, RF, Ukhta), V.Yu. Pankov (M.K. Ammosov North-Eastern Federal University, RF, Yakutsk), M.D. Ilinov (Saint-Petersburg Mining University, RF, Saint-Petersburg)

The current technology for the development of the Yaregskoye viscous oil field, extracted by the mining method, allows free flow of oil in an open groove along the inclined soil of the mine working to the point of collection and further pumping. At the same time, due to the heat exchange of mine air with rocks that enclose the transport mine working, as well as due to the heat exchange of air with the oil flow stream, the air is heating intensively and its temperature exceeds the values permitted by safety rules. These conditions at the workplaces negatively impact on the workers health. An analysis of literary sources has shown that the normalization of thermal conditions in mine workings is an important and urgent task for the oil mines of the Yaregskoye field.

We assessed the influence of oil freely flowing through the soil in an open groove on the thermal regime in oil mine and the necessaty to develop new technical solutions to reduce its intensity. To assess the significance of this heat source the gradients of the heat flow in the mine working with the presence of flowing oil and without it were compared. To describe the process of thermal conditions formation in the mine, a mathematical model was built and a system of differential equations was analytically solved. The absolute and relative errors in predicting the magnitude of the heat flux and temperature at the end of the mine was determined. According to the formulas obtained, calculations were carried out. It was found that errors in determining the heat flux gradient can reach significant values. Moreover, the error in determining the temperature at the end of the mine working can reach high values, significantly higher than permissible in engineering practice. The main findings of the research are as follows. When forecasting thermal conditions in oil mines, one must carefully consider the analysis of the influence of all heat sources. Dependencies are obtained for determining the relative error in determining the temperature gradient and the temperature itself at the end of the transport mine working caused by not taking into account the heat exchange of mine air with the oil transported in the open groove. It has been established that the transportation of oil in open grooves in the mine working soil has a significant effect on the level of heat exchange with ventilation air. An important factor in normalizing the microclimate parameters is the development of technological and technical solutions to reduce the influence of this source or to exclude it from heat transfer processes in mine workings.

References

1. Chebotarev A.G., Working environment and occupational morbidity of mine personnel (In Russ.), Gornaya promyshlennost', 2018, no. 1 (137), pp. 92–95.

2. Chebotarev A.G., Afanas'eva R.F., Assessment of physiological and sanitary aspects of microclimate at workplaces in underground and opencast mines, and preventive measures against its adverse effect (In Russ.), Gornaya promyshlennost', 2012, no. 6, pp. 34–40.

3. Epstein Y., Moran D.S., Thermal comfort and the heat stress indices, Industrial Health, 2006, V. 44(3), pp. 388–398.

4. Parsons K., Heat stress standard ISO 7243 and its global application, Industrial Health, 2006, no. 44(3), pp. 368–379.

5. Hunt A.P., Parker A.W., Stewart I.B., Symptoms of heat illness in surface mine workers, International Archives of Occupational and Environmental Health, 2013, V. 85 (5), pp. 519–527.

6. Rudakov M.L., Korobitsyna M.A., On the possibility of normalizing air temperature in the mine workings of the oil mines (In Russ.), Bezopasnost' truda v promyshlennosti, 2019, no. 8, pp. 66–71.

7. Nikolaev A.V., The method for ventilating the slope blocks of oil mines enhancing the energy efficiency of the underground oil production (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 11, pp. 133–136.

8. Alabyev V.R., Kruk M.N., Korobitcyna M.A., Stepanov I.S., Influence of environmental technologies on the economic component in the normalization of thermal conditions in oil-stores, Journal of Environmental Management and Tourism, 2018, V. 9, no. 1(25), pp. 75–81.

9. Nor M.A., Nor E.V., Tskhadaya N.D., Sources of heating microclimate in the process of thermal mining development of high-viscosity oil fields (In Russ.), Zapiski Gornogo instituta, 2017, V. 225, pp. 360–363, DOI: 10.18454/PMI.2017.3.360.

10. Shcherban' A.N., Kremnev O.A., Zhuravlenko V.Ya., Rukovodstvo po regulirovaniyu teplovogo rezhima shakht (Mine thermal management guide), Moscow: Nedra Publ., 1977, 359 p.

11. Voropaev A.F., Teplovoe konditsionirovanie rudnichnogo vozdukha v glubokikh shakhtakh (Thermal conditioning of mine air in deep mines), Moscow: Nedra, 1979, 192 p.

12. Martynov A.A., Maleev N.V., Yakovenko A.K., Software for calculating air temperature in excavated sections of deep mines (In Russ.), Ugol' Ukrainy, 2011, no. 3, pp. 34–36.

13. Galkin A.F., Thermal control in mine openings, Metallurgical and mining Industry, 2015, no. 2, pp. 304–307.

14. Galkin A.F., Thermal conditions of the underground town collector tunnel, Metallurgical and Mining Industry, 2015, no. 8, pp. 70–73.

15. Dyad'kin Yu.D., Osnovy gornoy teplofiziki dlya shakht i rudnikov Severa (Basics of mining thermal physics for mines and mines of the North), Moscow: Nedra Publ., 1968, 256 p.

The current technology for the development of the Yaregskoye viscous oil field, extracted by the mining method, allows free flow of oil in an open groove along the inclined soil of the mine working to the point of collection and further pumping. At the same time, due to the heat exchange of mine air with rocks that enclose the transport mine working, as well as due to the heat exchange of air with the oil flow stream, the air is heating intensively and its temperature exceeds the values permitted by safety rules. These conditions at the workplaces negatively impact on the workers health. An analysis of literary sources has shown that the normalization of thermal conditions in mine workings is an important and urgent task for the oil mines of the Yaregskoye field.

We assessed the influence of oil freely flowing through the soil in an open groove on the thermal regime in oil mine and the necessaty to develop new technical solutions to reduce its intensity. To assess the significance of this heat source the gradients of the heat flow in the mine working with the presence of flowing oil and without it were compared. To describe the process of thermal conditions formation in the mine, a mathematical model was built and a system of differential equations was analytically solved. The absolute and relative errors in predicting the magnitude of the heat flux and temperature at the end of the mine was determined. According to the formulas obtained, calculations were carried out. It was found that errors in determining the heat flux gradient can reach significant values. Moreover, the error in determining the temperature at the end of the mine working can reach high values, significantly higher than permissible in engineering practice. The main findings of the research are as follows. When forecasting thermal conditions in oil mines, one must carefully consider the analysis of the influence of all heat sources. Dependencies are obtained for determining the relative error in determining the temperature gradient and the temperature itself at the end of the transport mine working caused by not taking into account the heat exchange of mine air with the oil transported in the open groove. It has been established that the transportation of oil in open grooves in the mine working soil has a significant effect on the level of heat exchange with ventilation air. An important factor in normalizing the microclimate parameters is the development of technological and technical solutions to reduce the influence of this source or to exclude it from heat transfer processes in mine workings.

References

1. Chebotarev A.G., Working environment and occupational morbidity of mine personnel (In Russ.), Gornaya promyshlennost', 2018, no. 1 (137), pp. 92–95.

2. Chebotarev A.G., Afanas'eva R.F., Assessment of physiological and sanitary aspects of microclimate at workplaces in underground and opencast mines, and preventive measures against its adverse effect (In Russ.), Gornaya promyshlennost', 2012, no. 6, pp. 34–40.

3. Epstein Y., Moran D.S., Thermal comfort and the heat stress indices, Industrial Health, 2006, V. 44(3), pp. 388–398.

4. Parsons K., Heat stress standard ISO 7243 and its global application, Industrial Health, 2006, no. 44(3), pp. 368–379.

5. Hunt A.P., Parker A.W., Stewart I.B., Symptoms of heat illness in surface mine workers, International Archives of Occupational and Environmental Health, 2013, V. 85 (5), pp. 519–527.

6. Rudakov M.L., Korobitsyna M.A., On the possibility of normalizing air temperature in the mine workings of the oil mines (In Russ.), Bezopasnost' truda v promyshlennosti, 2019, no. 8, pp. 66–71.

7. Nikolaev A.V., The method for ventilating the slope blocks of oil mines enhancing the energy efficiency of the underground oil production (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 11, pp. 133–136.

8. Alabyev V.R., Kruk M.N., Korobitcyna M.A., Stepanov I.S., Influence of environmental technologies on the economic component in the normalization of thermal conditions in oil-stores, Journal of Environmental Management and Tourism, 2018, V. 9, no. 1(25), pp. 75–81.

9. Nor M.A., Nor E.V., Tskhadaya N.D., Sources of heating microclimate in the process of thermal mining development of high-viscosity oil fields (In Russ.), Zapiski Gornogo instituta, 2017, V. 225, pp. 360–363, DOI: 10.18454/PMI.2017.3.360.

10. Shcherban' A.N., Kremnev O.A., Zhuravlenko V.Ya., Rukovodstvo po regulirovaniyu teplovogo rezhima shakht (Mine thermal management guide), Moscow: Nedra Publ., 1977, 359 p.

11. Voropaev A.F., Teplovoe konditsionirovanie rudnichnogo vozdukha v glubokikh shakhtakh (Thermal conditioning of mine air in deep mines), Moscow: Nedra, 1979, 192 p.

12. Martynov A.A., Maleev N.V., Yakovenko A.K., Software for calculating air temperature in excavated sections of deep mines (In Russ.), Ugol' Ukrainy, 2011, no. 3, pp. 34–36.

13. Galkin A.F., Thermal control in mine openings, Metallurgical and mining Industry, 2015, no. 2, pp. 304–307.

14. Galkin A.F., Thermal conditions of the underground town collector tunnel, Metallurgical and Mining Industry, 2015, no. 8, pp. 70–73.

15. Dyad'kin Yu.D., Osnovy gornoy teplofiziki dlya shakht i rudnikov Severa (Basics of mining thermal physics for mines and mines of the North), Moscow: Nedra Publ., 1968, 256 p.


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