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Презентация была опубликована 8 лет назад пользователемЯна Румянцева
1 Mathematical Model of Rockmass Behaviour in Underground Coal Gasification National Mining University Vasil Lozynskyy Vasil Lozynskyy Research supervisor V.S Falshtynskyy Language adviser N.M Nechay
2 IMPORTANT PROBLEM
3 The height of caving zone after BUCG Subsidence h п is defined from expression : h п = (0.5…0.6)m в – m з - h; м, where m B – coal seam power, m; m З – power of ashslags layer, m; = СЛ.П.. К B rocks power increasing by swelling, m; сл.п.- power of pile swelling rocks, m where m B – coal seam power, m; m З – power of ashslags layer, m; h = h СЛ.П.. К B rocks power increasing by swelling, m; h сл.п.- power of pile swelling rocks, m Swelling coefficient in dependencies of rocks composition and temperature Chemi- cal compo- sition Rocks indexes %Heat up temperature, 0 C Swelling rocks Non swelling rocks SiO 2 62, ,151,451,481,71 Al 2 O 3 SiO 2 0,2-0,41 0,411,01,11,181,35 C0,6-4,2 4,21,01,21,321,53
4 Load distribution on rocks layer above underground gasgenerator in BUCCG: а – area 1, seam С 5, b – area 4, seam С 4, c- area5, seam С в 10, d- area 7, seam С 6. a b c d
5 Dependencies of rocks pile in rockmass above underground gasgenerator Change of pile parameters during BUCG Length of gasgenerator channel, m Spread of long wall movement, m / d 0,51,01,5 h max, mm V p max, m 3 V p min m 3 h max, mm V p max, m 3 V p min m 3 h max, mm V p max, m 3 V p min m
6 Rocks of roof and footwall mowing by the geomechanical and thermodynamic factor during underground gasgenerator U,мм. L, м. Т, мм. Y,мм U,мм. L, м Т,0С I II III U,мм. L, м
7 Parameters of heating the rock mass above the gas generator (test bench research) а б Degree of heating the rock mass of the roof (а) and ground(б): 1 – oxygen enriched blast (О 2 – 30%), pressure P = 0,4 МПа, row 4; 2 – air blast, pressureР = 0,6 МПа, row 2; 3 – air blast, pressure Р = 0,4 МПа.
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