Scholarly record
VERIFICATION OF FORECASTS OF SUBSIDENCES, INCLINATIONS AND CURVATURES OF AREA CAUSED BY MULTIDEPOSIT MINING CONDUCTED BY INCLUDING MINING MARGIN - CASE ANALYSIS
Abstract
Nowadays surveying пїЅ geological departments of Polish coal mines conduct forecasts of leverages of underground mining on area and construction works based on J. BialekпїЅs formulas including, among others, distant leverages, reactivation of old workings and mining margin. The objective of this article is the adequacy study of the conducted forecasts of area deformation in this way with relation to real values of deformation indicators confirmed by surveys. For this purpose, an example of a really terminated exploitation of hard coal, run in three deposits by a longwall system with a fall of roof rocks by a certain mine located with the territory of Upper Silesian Coal Basin, was used. The forecasts of subsidences, inclinations and curvatures of mining area were conducted in measurement points with the use of EDN-OPN computer programme and J. BialekпїЅs formulas. Typical values of parameters of these formulas were used in the forecasts, namely, mining coefficient equal to 0.8; tangent of scope angle of main leverages amounting to 2.3; mining margin parameter equal to 0.15. The forecasts were conducted for each exploitation stage, namely, leverages deriving from the exploitation of one, two and three deposits were calculated. Subsequently, such conducted forecasts were compared with values of subsidences, inclinations and curvatures calculated from altitude and distance surveys of stabilised points in the ground over an exploitation field, forming a parallel line to face runs. The values of R correlation coefficients were provided between theoretical and measured courses of deformation indicators, their extreme values were compared and their standard deviations were calculated.
Publication Impact Profile
Publication details
References12
Białek J., Opis nieustalonej fazy obniżeń terenu górniczego z uwzględnieniem asymetrii wpływów końcowych, Zeszyty Naukowe Pol. Śl. (Górnictwo), z. 194, Gliwice, 1991 (polish).
Janusz W. et. all, Surface monitoring of water basins based on use of autonomous flying robots, 20th International Conference on Methods and Models in Automation and Robotics, Poland, 2015, pp 376 – 381.
Janusz W. et. all, The concept of combined measurements of the Gliwice Radio Tower deflection in relation to the speed and direction of the wind with use of quadrotor, 17th International Carpathian Control Conference, Slovakia, 2016, pp 280 – 285.
Klamka J. et. all, UAV application for delivering the Internet access during the geodetic measurements, 10th Scientific Conference Internet in the Information Society, Poland, 2015, pp 9 – 25.
Kowalski A., Jędrzejec E., Influence of subsidence fluctuation on the determination of mining area curvatures, Archives of Mining Sciences, vol. 60/issue 2, pp 487 – 505, 2015.
Kratzsch H., Mining Subsidence Engineering, Springer, New York, 1983.
Mielimąka R., Orwat J., Approximation of average course of measured curvatures of mining area with reference to their forecast values by Knothe’s formulas, 14th International Conference of Numerical Analysis and Applied Mathematics, Greece, 2016.
National Coal Board (Mining Department), Subsidence Engineer’s Handbook, London, 1975.
Orwat J., Mielimąka R., The comparison of measured deformation indicators of mining area with theoretical values calculated using Knothe’s formulas, 13th International Conference of Numerical Analysis and Applied Mathematics, Greece, 2015, pp 080014-1 – 080014-4.
Orwat J., Mielimąka R., Approximation of average course of measured curvatures of mining area with reference to their forecast values by Białek’s formulas, 14th International Conference of Numerical Analysis and Applied Mathematics, Greece, 2016.
Orwat J., The forecast effectiveness of mining exploitation effects on the exploited area conducted with the use of Białek’s formulas, 13th International Conference of Numerical Analysis and Applied Mathematics, Greece, 2015, pp 080013-1 – 080013-4.
Orwat J., Approximation of average course of measured subsidences of mining area by smooth splines, 14th International Conference of Numerical Analysis and Applied Mathematics, Greece, 2016.
Citing literature
Number of times cited according to Crossref: 2
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.
