Minieiev S.P., Usov O.O., Poliakov Yu.Ye. The possibilities to estimate hydroloosening efficiency by asymptotic form of barodynamic curve

Details

Parent Category: Geo-Technical Mechanics, 2022

Category: Geo-Technical Mechanics, 2022, № 162

Geoteh. meh. 2022, 162, 66-75

https://doi.org/10.15407/geotm2022.162.066

 

THE POSSIBILITIESTO ESTIMATE HYDROLOOSENING EFFICIENCY BY ASYMPTOTIC FORM OF BARODYNAMIC CURVE

Minieiev S.P., Usov O.O., Poliakov Yu.Ye.

Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine

UDC 622.831.1:622.234.5:622.807.4

Language: English

Abstract. The determining criterion for assessing efficiency of hydro-loosening is the nature of the barodynamic curve, and the determining parameter is the final injection pressure. However, it should be noted that the document SOU 10.1.00174088011-2005 say nothing about the presence of two types of barodynamic curves - extreme and asymptotic, which characterize the change of pressure in the process of hydraulic loosening. In the article, a comparative assessment of the determination of hydroloosening efficiency by barodynamic curves is presented. Different calculation models for estimating the length of safe face advance at asymptotic barodynamics are demonstrated, which led to the same result in terms of distance (depth) of safe coal extraction. It is shown that the length of safe face advance at asymptotic barodynamics of hydroloosening is much greater than the depth of sealing. A method for estimating the distance of safe extraction of coal was applied, which indicates that it clearly reflects the existing natural laws. Asymptotic barodynamics, in contrast to the extreme one, provides a much lower final pressure, which can be compared with the final pressure at hydro-pressing, but without the face slip.
That is, the reduction of the final pressure by 80% of the maximum at asymptotic barodynamics compared with its reduction by the normative 30% for the same duration at extreme barodynamics indicates that the unloading of the coal seam at the depth of sealing is significantly greater in the asymptotic case.
It is shown that the efficiency of hydro-loosening can now be easily determined by asymptotic form of the barodynamic curve. It is also proved that the lower is the final pressure of hydro-loosening, the deeper is the unloading zone in the heading area of the coal seam for the asymptotic barodynamic unloading zone, and it reaches its maximum, which can be compared with the depth of sealing.
Keywords: barodynamic curves, asymptotic form of the curve, hydro-loosening efficiency, rock pressure, water injection, sealing depth, rock pressure diagram.

 REFERENCES

1. Standard of the Minvugleprom of Ukraine (2005), SOU 10.1.00174088.011-2005. Pravyla vedennya hirnychykh robit na plastakh, skhylnykh do hazodynamichnykh yavyshch. Standart Minvuhlepromu Ukraïny [10.1.00174088.011-2005. Rules for conducting mining operations on layers prone to gas-dynamic phenomena], Ukraine Ministry of Coal Industry, Kiev, Ukraine.

2. Mineev, S.P., Potapenko, A.A., Mhatvari, T. Ya., Nikiforov, A.V., Kuzarya, S.V. and Timofeev, E.I. (2013), Pidvushenyaefektuvnostigidravlichnogorozpushuvanyavukudonebezpechnuhvugilnuhplastiv [Increasing the efficiency of hydraulic loosening of hazardous coal seams], Skhidnyy vudavnuchuy dim, Donetsk, Ukraine.

3. Mineev, S.P., Usov, O.A. and Poliakov, Yu.E. (2021), Napirna filtraciyu u vugleporodnomu masuvi [Pressure filtration in a coal massif], Bila, Dnipro, Ukraine.

4. Koptikov, V.P., Bokiy, B.V., Mineev, S.P., Yuzhanin, I.A. and Nikiforov, A.V. (2016), Udoskonslenya sposobiv ta zasobiv bezpechnoyi rozrobku vugilnukh plastiv, shulnukh do gazodunamichnukh yavush [Improvement of methods and means of safe development of coal seams prone to gas-dynamic phenomena], Promin, Donetsk, Ukraine.

5. Mineev, S.P., Rubunskuy, A.A., Vitushko, O.V. and Radchenko,O.G. (2010), Girski robotu u skladnukh umovakh na vukudonebezpechnukh vugilnukh plastakh[Mining operations in difficult conditions on hazardous coal seams], Skhidnyy vudavnuchuy dim, Donetsk, Ukraine.

6. Chernov, O.I. (1975), Pidgotovka shahtnukh poliv iz gazovubrosonebezpechnumu plastamu[Preparation of mine fields with hazardous coal seams], Nadra .

7. Krukovskuy, O.P., Krukovskuy, V.V. and Usov, O.O. (2020), “The influence of coal treatment with water and antipyrogens on the formation of the stress field around the mine”, Geotekhnicheskaya Mekhanika[Geo-Technical Mechanics], no 150, pp 116-126. https://doi.org/10.15407/geotm2020.150.116

8. Pikhachov, G.B. and Isaev, R.G. (1972), Pidzemna hidravlika [Underground hydraulics], Head helper, Nadra.

9. Usov, O.О. (1985),Establishing regularities of liquid filtration, increasing the efficiency of coal seam hydration, Abstract of Cand. Tech. dissertation, Sciences: 05.15.11,   M.S. Poljakov Institute of Geotechnical Mechanics under NAS of Ukraine, Dnepropetrovsk, Ukraine.

10. Usov, O.О. (2020),“The assessment of compliance with the linear law of filtration leads to the real dynamics of changes in its pressure during injection into the coal seam”, Geotekhnicheskaya Mekhanika[Geo-Technical Mechanics], no. 150, pp 93-101.

About authors:

Minieiev Serhii Pavlovych, Doctor of Technical Sciences (D.Sc.), Professor, Head of the Department of Pressure Dynamics Control in Rocks, Institute of Geotechnical Mechanics named by N. Poljakov of the National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Usov Oleh Oleksandrovych, Candidate of Technical Sciences (Ph.D.), Senior Researcher in Department of Pressure
Dynamics Control in Rocks, Institute of Geotechnical Mechanics named by N. Poljakov of the National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Poliakov Yurii Yevhenovych, Doctoral Student, Junior Researcher in Department of Pressure Dynamics Control in Rocks, Institute of Geotechnical Mechanics named by N. Poljakov of the National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

• < Prev
• Next >