De of occurrence, deformation, UCB-5307 References structure) Enclosing rock thickness, m Hydrogeological circumstances
De of occurrence, deformation, structure) Enclosing rock thickness, m Hydrogeological situations (water inflow), m3 /h Methane content, m3 /103 kg Uncomplicated 40 Moderately Complicated 405 Dipping coal seams with minor deformations which might be quick to identify 200 20000 from 5 to ten Tricky 7500 Dipping coal seams with various folds, secondary folds, faults, and complex secondary faulting 500 500.000 from 10 to 15 Quite Complicated 100 Thin to quite thin seams and lenticular coal seams; coal mines are located using a distribution location of less than two km2 80 1.000.000 Flat-lying, quite thick, undeformed coal seamsless than 20 not exceeding 100 to 200 Supply: compiled by the authors according to [24].The information presented in Table 2 tends to make it possible to classify each mine when it comes to the Pinacidil Cancer complexity of its geological circumstances by each and every individual criterion. Qualities of the geological conditions in the coal mines operated by Vinacomin are presented in Table 3.Table 3. Geological situations at Vinacomin coal mines. Traits Coal Mine Seam Thickness Variability, 26 121 74 97 32 68 114 74 101 19 76 46 26 Qualitative Traits Uncomplicated Pretty tough Effortless Tough Moderately difficult Quite difficult Pretty hard Simple Hard Moderately tough Tough Uncomplicated Simple Enclosing Rock Thickness, m No 76 17 73 14 84 91 No 79 36 47 No No Hydrogeological Circumstances, m3 /h 223 591 506 1082 214 225 1074 261 1997 111 1057 197 204 Methane Content, m3 /103 kg two.88 20.07 five.81 1.31 0.95 1.45 5.45 14.9 five.81 5.04 11.37 five.85 0.Vang Danh Mao Khe Trang Bach Nam Mau Ha Lam Hon Gai Mong Duong Khe Cham Khe Cham three Khe Tam Nga Hai Thong Nhat Nui BeoSources: compiled by the authors based on the data presented in Table two and using [26].The outcomes of the qualitative assessment in the coal mines according to the complexity of geological situations are presented in Table four.Sustainability 2021, 13,six ofTable four. Quantitative assessment of the complexity of geological conditions at coal mines.Parameter Scoring Coal Mine Criterion weight Vang Danh Mao Khe Trang Bach Nam Mau Ha Lam Hon Gai Mong Duong Khe Cham Khe Cham 3 Khe Tam Nga Hai Thong Nhat Nui Beo Seam Thickness Variability 0.204 1 four two three 1 two four 2 4 1 three 2 1 Qualitative Traits 0.207 1 4 1 three two four four 1 3 2 3 1 1 Enclosing Rock Thickness 0.172 1 3 1 three 1 four 4 1 three two 2 1 1 Supply: compiled by the authors. Hydrogeological Circumstances 0.204 two 3 3 four 2 2 three 2 four 1 4 1 two Methane Content 0.213 1 four two 1 1 1 two 3 two 2 three 2 1 Total 1 6 18 9 14 7 11 17 9 16 8 15 7 6 1.two three.62 1.83 2.78 1.41 2.55 3.37 1.83 three.two 1.59 3.03 1.42 1.2 Weighted TotalThe table shows score distribution according to the complexity of geological conditions by the established criteria. Taking into account the weight of every criterion, the total score was calculated that reflects the degree of situation complexity. Assessment in the influence of geological situations around the sustainability of coal mines. The outcomes of ranking the coal mines by the complexity of geological situations plus the corresponding indicators of production sustainability are presented in Table five.Table five. Coal mine ranking by the complexity of geological situations. Coal Mine Ranking Vang Danh Nui Beo Ha Lam Thong Nhat Khe Tam Trang Bach Khe Cham Hon Gai Nam Mau Nga Hai Khe Cham 3 Mong Duong Mao Khe Geological Situation Score 1.two 1.2 1.41 1.42 1.59 1.83 1.83 two.55 two.78 three.03 3.two 3.37 3.62 Production Sustainability Indicators V 2873 525 2361 1812 1919 2669 1654 1710 2026 1480 1468 1442 1.690 Jc two.19 1.
