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Opportunities of Re-Establishing Underground Mining in the Borsod Coal Basin in North-Eastern Hungary

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Opportunities of Re-Establishing Underground Mining in the Borsod Coal Basin in North-Eastern Hungary DOI 10.2478/ntpe-2019-0057 Opportunities of re-establishing underground mining in the borsod coal basin in north-eastern Hungary 2019 József Molnár, Ákos Debreczeni, Richárd Tompa Volume 2 Institution of Mining and Geotechnical Engineering, Issue 1 University of Miskolc, Hungary pp. 532-540 Date of submission to the Editor: 05/2019 Date of acceptance by the Editor: 08/2019 CADASTRE OF HUNGARIAN COAL RESERVES Significant coal reserves remained in Hungary despite mine closures, and these could be taken into account when considering future fuel and raw material demand of the country. So Mining and Geological Survey of Hungary (MBFSZ) contributed a new cadastre of Hungarian coal deposits of greater or less reserves throughout the country which is available in electronic digital form (https://map.mbfsz.gov.hu/coal_cadastre/). Geological information that can be obtained using the database in question is of essential importance in mine design. Coal basins of Hungary are showed by Figure 1. Fig. 1 Coal basins of Hungary Source: Mining and Geological Survey of Hungary – MBFSZ DEMAND FOR NEW BROWN COAL SOURCES A special research took place in the past years analyzing possibility of establishing coal chemical industry in the Borsod region in question especially József MOLNÁR, Ákos DEBRECZENI, Richárd TOMPA 533 for methanol production. So reserves of brown coal were taken into consideration such as near Kazincbarcika (Tardona), Edelény (Szendrő), and Putnok (Dubicsány and Sajómercse II). Coal demand of chemical utilization should be considered a lucky situation from mining point of view. On the one hand such a plant needs coal of constant quantity and quality as raw material and on the other hand opening a new mine of economic output requires one or more major industrial consumers. Chemical industry which has similar remarkable traditions in the region as mining can be the only major buyer as utilization of coal for power generation is not preferred this time. Although there are several brown coal deposits in the Borsod region, we focus on the Dubicsány and Sajómercse II ones (Figure 2). Both coal deposits are close the Sajó river at town of Putnok. Sajómercse II consists of the eastern remains of the former Putnok underground coal mine south of Sajó furthermore some 10 million tons of east of it. The Dubicsány deposit which is north of the river is totally untouched as no production operations were in it in the past. Main properties of mining point of view of both deposits are described in the paper published by MBFSZ (Debreczeni et al. 2018). Institution of Mining and Geotechnical Engineering was participant in preparing mining plans. Fig. 2 Location of the Dubicsány and Sajómercse II coal deposits in the Borsod coal basin Source: Mining and Geological Survey of Hungary – MBFSZ The Dubicsány brown coal deposit 262 boreholes were sunk on the 23.58 km2 area of the Dubicsány brown coal deposit. Both core sampling and geophysical analysis were done for the vast majority of the holes. Two coal seams (IV and V) are available. Seam IV is thin, not mineable and can be found only on a small part of the deposit. Seam V is mineable and can be found over the whole area. Thickness and mean calorific value of Seam V was determined for all boreholes throughout the whole deposit. Valuating thickness and specific heat content enabled more accurate determination of the borders of the parts of the mine (as 534 New Trends in Production Engineering – Volume 2, issue 1, 2019 shown fields North I, North II, South I and South II on Figure 3). Steadier seam thickness and calorific value in a mine field is more advantageous from mining engineering point of view. 755000 755500 756000 756500 757000 757500 758000 758500 759000 759500 760000 760500 761000 761500 P-40 333000 333000 P-3812.21P-35 Du-23 11.43 8.64 2.13 North II Du-46 Dö-5 Dö-7 P-15 P-33 P-24 11.51 7.37Du-51 Du-28 Dö-4 Dö-8 P-31 P-14 Dö-3 332500 P-31/a 11.93 332500 Du-55 11.51 3.47 11.28 11.98 P-32 Du-43 Sg-41 10.89 Dö-9 P-39 P-29 Du-47 10.59Du-45 11.41 11.37 11.65 Sg-34 12.60 11.52P-28 Sg-13 Dö-6 P-37 12.93Du-2911.08 Sg-14 North I Du-42 12.22 11.66 J-46 332000 P-30 11.86 Sg-44 Sg-38 Sk-244 332000 0.59 J-57 9.05 P-22 Du-4810.92 11.22 Sk-287 Sk-263 J-54 12.11Du-50 Sg-50 10.87 Sg-40 P-23 11.68 Sg-12 10.26 J-53 P-21 11.41 11.34 Sg-46 10.97Sk-303 J-52 P-5 Du-53 Du-44 11.77 Sg-16 9.99 8.20 Sg-51 Sg-11 12.59 9.85 Sk-265Sk-264 Du-26 11.06 Sk-295 J-50/aJ-5010.41 331500 11.82 10.81 Sk-286 331500 P-25/aP-25 P-20 Du-13 11.24 Sg-33 8.21 7.45 J-49 P-19/aP-19/bP-19/cP-19 14.30Du-39 Du-49 Sg-49 Sg-37 Sk-301 9.52P-62/H 12.97 Du-35 Du-38 Sk-299 13.38 11.59 11.56 10.78 12.17 Sk-302 10.46 Du-11 Sg-48 Sg-6 Sg-32 Sk-302/a P-27 13.83Du-36 12.13 10.00 Sk-252 P-48 Du-379.75 Sg-53 10.46 13.1110.58 P-26 Du-33 10.55 Sk-285 Sk-300 10.47 331000 13.37 13.23 Sg-47 Sg-54 Sk-298 331000 P-46 10.89 10.49 12.72Du-52 9.98Du-8 9.83 Sk-293 P-13 3.42 Du-41 10.42 9.77Sg-19 Sk-296 Sk-304 P-11 Sg-31 Sg-63 10.66Sk-276 13.79 Du-15 10.61 10.94 P-47 13.26 9.88 10.30 10.91Sk-297 Pu-57 P-34 Du-54 Du-40 9.14 Sg-30Sg-62 Sk-284 12.82 11.05 P-45 D-7 11.20Sg-18Sg-29 11.28 330500 14.00Pu-50 13.22 Du-67 11.69 9.79 10.00Sk-291 330500 Du-21 Du-62 Sg-57 Sk-253 13.55P-44 Du-12 10.67 12.2010.87 Sg-27 Sk-294 12.54P-43 Du-34 Sg-42 11.48 Pu-53 Du-71 10.49 10.03 10.13 Sg-26/ASg-26 12.48 Du-68 Du-70 Du-57 Du-65 11.43 11.66 Sg-35 Sg-25 11.83 13.38 Du-32 P-42/BP-42 12.65 12.42 P-8 P-42/A 13.35 10.60 9.81 8.65 Sg-36 12.16 Pu-60 Du-74 Du-60 Du-24 10.32 12.91Du-20 Du-90 Du-58 Sg-43 Sk-283 330000 12.90 Sg-1514.82 330000 11.50 P-49 8.65 9.46 9.93 Sg-39 Pu-58 13.31 12.58 Du-85 8.80 11.13 12.12 12.62 Du-89 Du-75 Du-66 11.83 Pu-51 Du-73D-6 Sg-28/ASg-28 Sg-52 Pu-61 12.58 10.09 9.51 Sg-4 P-9 10.84 P-6 Du-81 8.76 10.08 11.23 9.21 Du-18 9.42 Du-14 Du-63 5.91 Pu-52 Du-78 Sg-9 329500 12.19 12.42 7.94 8.53 Sg-55 Sg-45 329500 Pu-56 Du-84 Du-76 8.79 10.79Pu-54 Du-61 7.15 Du-83 10.00 7.25 Du-16 Du-56 10.17 P-7 10.79 8.67 South II 10.47 8.00 8.24Du-77 Sg-10 Du-59 Du-86 8.18 Du-88 Du-64 8.82Sg-56 10.17 Du-72/BDu-72/ADu-72 8.10 Pu-55 8.04 7.69 7.42 Du-798.39 9.45 9.96 Du-87 D-3 Du-10 329000 8.93P-310.92 Du-69 Du-17 Sg-60 329000 Du-92 9.06 7.53 7.78 Sg-5 Pu-59 9.16Du-94 Du-97 Du-91 Du-82 Du-80 Sg-58 7.45 8.32 Du-1910.69 5.97 6.97 7.80 6.66 Sg-59 Du-96 Du-99 Du-95 Du-25 Du-93 1.94 6.90 328500 5.96 7.53 10.74 Sg-17 328500 Du-101 Du-100 Du-98 Sg-61 6.66 6.50 Sg-7 5.66 Sg-20 9.73 328000 DUBICSÁNY BROWN COAL DEPOSIT 328000 AVERAGE CALORIFIC VALUE OF THE COAL (MJ/kg) AND BORDERS OF South I THE PARTS OF THE MINE (SEAM V) 327500 327500 1:20000 755000 755500 756000 756500 757000 757500 758000 758500 759000 759500 760000 760500 761000 761500 Fig. 3 Average calorific value of the coal (MJ/kg) and borders of the parts of the Dubicsány mine. Faults are highlighted by red lines Source: Molnár (editor-in-chief), 2018 Total thickness of layers between the two seams (mostly sand) is of 70-72 m at average. Coal reserve of the Dubicsány deposit is concentrated in Seam V. Its thickness is 5-6 m on the vast majority of the deposit except on the south- western part and near the border of the seam.
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