[email protected]

Feichun heavy duty cable

14 Min Read
Complete technical analysis of Prysmian CORDAFLEX SMK 6/10kV motorized reeling cable for port cranes (STS, RTG, RMG), stacker-reclaimers, and bucket wheel excavators: anti-torsion Kevlar/polyester braid prevents helical conductor collapse under 120–160 m/min drum rotation, EPR 3GI3 semi-conductive insulation resists corona discharge during high-frequency transient pulsing, 5GM5 neoprene sheath maintains flex and abrasion resistance at ±40°C, split earth cores (3×16/3) enable selective over-current relay operation. FeiChun NTSCGEWÖU-Reeling Cable — certified equivalent with DIN VDE 0250-813, triple-extrusion CCV process, 30–35% cost savings, 45–60 day lead time. Replaces CORDAFLEX SMK for port terminals, maritime bulk handling, and open-pit mining operations globally under import substitution programs.
Technical Department
on17/03/2026

CORDAFLEX SMK Equivalent Crane Reeling Cable: Complete Technical Analysis and Direct Drop-In Replacement Solution for STS Cranes, Stacker-Reclaimers, and Mining Bucket Wheel Excavators

Complete technical analysis of Prysmian CORDAFLEX SMK 6/10kV motorized reeling cable for port cranes (STS, RTG, RMG), stacker-reclaimers, and bucket wheel excavators: anti-torsion Kevlar/polyester braid prevents helical conductor collapse under 120–160 m/min drum rotation, EPR 3GI3 semi-conductive insulation resists corona discharge during high-frequency transient pulsing, 5GM5 neoprene sheath maintains flex and abrasion resistance at ±40°C, split earth cores (3×16/3) enable selective over-current relay operation. FeiChun NTSCGEWÖU-Reeling Cable — certified equivalent with DIN VDE 0250-813, triple-extrusion CCV process, 30–35% cost savings, 45–60 day lead time. Replaces CORDAFLEX SMK for port terminals, maritime bulk handling, and open-pit mining operations globally under import substitution programs.
14 Min Read
Comprehensive technical breakdown of OnGbit TF Kable 3.6/6kV underground mining cable for roadheaders, TBM, shaft sinking in coal mines, potash mines, tunnel excavation: dynamic trailing under high tensile load 500–1500 kg, scarp rock abrasion, high humidity with condensation, semi-conductive screens prevent corona discharge at 6kV, splitted earth (PE, N, GND) + pilot core enable selective protection relay operation upon sheath damage, flame-retardant RPШ-1 outer sheath (Russian mine safety rules), self-extinguishing design meets ATEX directive (explosion-proof EU standard). Nomenclature: O=Sheath, n=flame-retardant, G=rubber insulation, bit=mining-specific underground. FeiChun SHD-GC 8kV and Russian КГЭШ 6kV — verified alternatives with premium flame-retardants, MSHA-equivalent testing, and IEC 60332 compliance for coal and potash mining operations.
Technical Department
on17/03/2026

Шахтный кабель OnGbit (TF Kable): Полный разбор высоковольтного кабеля 3.6/6kV для проходческих комбайнов и туннелестроения — замены для российских угольных шахт, калийных рудников, туннельных выработок

Comprehensive technical breakdown of OnGbit TF Kable 3.6/6kV underground mining cable for roadheaders, TBM, shaft sinking in coal mines, potash mines, tunnel excavation: dynamic trailing under high tensile load 500–1500 kg, scarp rock abrasion, high humidity with condensation, semi-conductive screens prevent corona discharge at 6kV, splitted earth (PE, N, GND) + pilot core enable selective protection relay operation upon sheath damage, flame-retardant RPШ-1 outer sheath (Russian mine safety rules), self-extinguishing design meets ATEX directive (explosion-proof EU standard). Nomenclature: O=Sheath, n=flame-retardant, G=rubber insulation, bit=mining-specific underground. FeiChun SHD-GC 8kV and Russian КГЭШ 6kV — verified alternatives with premium flame-retardants, MSHA-equivalent testing, and IEC 60332 compliance for coal and potash mining operations.
15 Min Read
Comprehensive technical breakdown of OnGdek TF Kable 6/10kV barrel cable for bucket wheel excavators, draglines in Kuzbass open-pit mining: dynamic reeling under high tension at 120 m/min, -40°C arctic operation, Kevlar helical anti-torsion cord prevents spiral conductor collapse, Arctic neoprene (5GM5) outer sheath maintains flex at -45°C, EPR 3GI3 insulation resists thermal cycling. Nomenclature: O=Sheath, n=flame-retardant, G=rubber insulation, e=screened, d=dynamic barrel reeling, k=Kevlar cord guard. OnGdek ≈ German (N)TSCGEWÖU 6/10kV with Polish helical-collapse prevention. FeiChun NTSCGEWÖU-Reeling Cable and Russian КГЭЖ-ХЛ GOST — verified alternatives with -45°C cold-flex rubber and kord reinforcement.
Technical Department
on17/03/2026

Экскаваторный кабель OnGdek (TF Kable): Полный разбор барабанного кабеля 6/10kV и премиум-замены для Кузбасса, Чукотки, Урала при сибирских морозах -45°C

Comprehensive technical breakdown of OnGdek TF Kable 6/10kV barrel cable for bucket wheel excavators, draglines in Kuzbass open-pit mining: dynamic reeling under high tension at 120 m/min, -40°C arctic operation, Kevlar helical anti-torsion cord prevents spiral conductor collapse, Arctic neoprene (5GM5) outer sheath maintains flex at -45°C, EPR 3GI3 insulation resists thermal cycling. Nomenclature: O=Sheath, n=flame-retardant, G=rubber insulation, e=screened, d=dynamic barrel reeling, k=Kevlar cord guard. OnGdek ≈ German (N)TSCGEWÖU 6/10kV with Polish helical-collapse prevention. FeiChun NTSCGEWÖU-Reeling Cable and Russian КГЭЖ-ХЛ GOST — verified alternatives with -45°C cold-flex rubber and kord reinforcement.
21 Min Read
Full technical breakdown Tele-Fonika NSHTÖU-J 4G95 0.6/1kV: heavy-duty reeling cable for gantry cranes (RMG/RTG), ship unloaders, stacker-reclaimers, port terminals. Four cores × 95mm² (380mm² total), weighing ~6 kg/m, designed for continuous drum winding under 5–7 kN tension at speeds to 120 m/min. Class 5 copper stranding (~0.20 mm wire) enables bending radius 10–12× OD. Built-in anti-torsion reinforcement (synthetic high-strength fibers between inner and outer sheaths) prevents corkscrew effect—uncontrolled strand migration during winding that tears sheath. EPR 3GI3 insulation handles thermal/mechanical stress in maritime environment. Neoprene 5GM5 sheath (3.5–4.5 mm thick, black) resists abrasion, tearing, ozone, UV, oil. FeiChun NSHTÖU-J Reeling Cable 4G95 — full functional equivalent using identical anti-torsion architecture, kevlar-fiber or polyester anti-pull braiding, EPR insulation, thick-wall neoprene extrusion. Compatible with European port equipment connectors (Konecranes, Liebherr, ABB, Siemens).
Technical Department
on16/03/2026

(N)TSKCGEWÖU 12/20kV: Высоковольтная альтернатива TF Kable для экскаваторов и мобильных подстанций РФ без санкционных наценок — инженерия индивидуальных медных экранов и тройной экструзии — FeiChun MV Mining Cable

Full technical breakdown Tele-Fonika NSHTÖU-J 4G95 0.6/1kV: heavy-duty reeling cable for gantry cranes (RMG/RTG), ship unloaders, stacker-reclaimers, port terminals. Four cores × 95mm² (380mm² total), weighing ~6 kg/m, designed for continuous drum winding under 5–7 kN tension at speeds to 120 m/min. Class 5 copper stranding (~0.20 mm wire) enables bending radius 10–12× OD. Built-in anti-torsion reinforcement (synthetic high-strength fibers between inner and outer sheaths) prevents corkscrew effect—uncontrolled strand migration during winding that tears sheath. EPR 3GI3 insulation handles thermal/mechanical stress in maritime environment. Neoprene 5GM5 sheath (3.5–4.5 mm thick, black) resists abrasion, tearing, ozone, UV, oil. FeiChun NSHTÖU-J Reeling Cable 4G95 — full functional equivalent using identical anti-torsion architecture, kevlar-fiber or polyester anti-pull braiding, EPR insulation, thick-wall neoprene extrusion. Compatible with European port equipment connectors (Konecranes, Liebherr, ABB, Siemens).
22 Min Read
TF Kable replacement, Tele-Fonika alternative, NSSHOU 3x50, NSSHOU 3x50+3x25/3, NSSHOU-J cable, heavy duty rubber cable, yellow mining cable, 0.6/1kV flexible cable, split earth core, symmetrical earth cable, Feichun NSSHOU, Feichun mining cable, Chinese premium mining cable, import substitution cable, trailing cable 50mm2, VDE 0250-812, EPR insulation 3GI3, 5GM5 outer sheath, tear resistant rubber cable, flame retardant trailing cable, oil resistant mining cable, UV resistant flexible cable, open cast mining cable, underground mining cable, tunnel boring machine cable, TBM power cable, mobile equipment cable, industrial heavy flex, tinned copper class 5, continuous flexing cable, dragline trailing cable, shovel power cable, Feichun heavy duty cable, Prysmian PROTOMONT alternative, Nexans RHEYFIRM equivalent, LHD loader cable, coal mining cable, explosion proof equipment cable, flexible power cable 50mm2, abrasion resistant trailing cable, dynamic load rubber cable, thick rubber sheath cable, 3 phase rubber cable, Feichun special cable, European standard cable alternative, sanction free mining cable, direct factory mining cable, NSSHOU equivalent, heavy machinery wiring, construction site power cable
Technical Department
on16/03/2026

Аналог кабеля TF Kable (N)SSHÖU 3×50+3×25/3: Замена без санкционных переплат в открытых разработках РФ — инженерия расщепленной земли и симметричной геометрии — FeiChun Mining Cable

TF Kable replacement, Tele-Fonika alternative, NSSHOU 3×50, NSSHOU 3×50+3×25/3, NSSHOU-J cable, heavy duty rubber cable, yellow mining cable, 0.6/1kV flexible cable, split earth core, symmetrical earth cable, Feichun NSSHOU, Feichun mining cable, Chinese premium mining cable, import substitution cable, trailing cable 50mm2, VDE 0250-812, EPR insulation 3GI3, 5GM5 outer sheath, tear resistant rubber cable, flame retardant trailing cable, oil resistant mining cable, UV resistant flexible cable, open cast mining cable, underground mining cable, tunnel boring machine cable, TBM power cable, mobile equipment cable, industrial heavy flex, tinned copper class 5, continuous flexing cable, dragline trailing cable, shovel power cable, Feichun heavy duty cable, Prysmian PROTOMONT alternative, Nexans RHEYFIRM equivalent, LHD loader cable, coal mining cable, explosion proof equipment cable, flexible power cable 50mm2, abrasion resistant trailing cable, dynamic load rubber cable, thick rubber sheath cable, 3 phase rubber cable, Feichun special cable, European standard cable alternative, sanction free mining cable, direct factory mining cable, NSSHOU equivalent, heavy machinery wiring, construction site power cable
25 Min Read
Full technical breakdown Tele-Fonika NSHTÖU-J 4G95 0.6/1kV: heavy-duty reeling cable for gantry cranes (RMG/RTG), ship unloaders, stacker-reclaimers, port terminals. Four cores × 95mm² (380mm² total), weighing ~6 kg/m, designed for continuous drum winding under 5–7 kN tension at speeds to 120 m/min. Class 5 copper stranding (~0.20 mm wire) enables bending radius 10–12× OD. Built-in anti-torsion reinforcement (synthetic high-strength fibers between inner and outer sheaths) prevents corkscrew effect—uncontrolled strand migration during winding that tears sheath. EPR 3GI3 insulation handles thermal/mechanical stress in maritime environment. Neoprene 5GM5 sheath (3.5–4.5 mm thick, black) resists abrasion, tearing, ozone, UV, oil. FeiChun NSHTÖU-J Reeling Cable 4G95 — full functional equivalent using identical anti-torsion architecture, kevlar-fiber or polyester anti-pull braiding, EPR insulation, thick-wall neoprene extrusion. Compatible with European port equipment connectors (Konecranes, Liebherr, ABB, Siemens).
Technical Department
on16/03/2026

Аналог барабанного кабеля TF Kable NSHTÖU-J 4G95: Замена польского провода для портальных кранов и портовых терминалов РФ — FeiChun Reeling Cable

Full technical breakdown Tele-Fonika NSHTÖU-J 4G95 0.6/1kV: heavy-duty reeling cable for gantry cranes (RMG/RTG), ship unloaders, stacker-reclaimers, port terminals. Four cores × 95mm² (380mm² total), weighing ~6 kg/m, designed for continuous drum winding under 5–7 kN tension at speeds to 120 m/min. Class 5 copper stranding (~0.20 mm wire) enables bending radius 10–12× OD. Built-in anti-torsion reinforcement (synthetic high-strength fibers between inner and outer sheaths) prevents corkscrew effect—uncontrolled strand migration during winding that tears sheath. EPR 3GI3 insulation handles thermal/mechanical stress in maritime environment. Neoprene 5GM5 sheath (3.5–4.5 mm thick, black) resists abrasion, tearing, ozone, UV, oil. FeiChun NSHTÖU-J Reeling Cable 4G95 — full functional equivalent using identical anti-torsion architecture, kevlar-fiber or polyester anti-pull braiding, EPR insulation, thick-wall neoprene extrusion. Compatible with European port equipment connectors (Konecranes, Liebherr, ABB, Siemens).
27 Min Read
Full technical breakdown Tele-Fonika NTSCGEWÖU 6/10kV: high-voltage trailing cable for bucket wheel excavators, draglines, drill rigs, mobile transformer substations in open-pit mining. Semi-conductive screens prevent corona discharge at 6/10kV. Splitted earth (3x16/3 configuration) enables reliable ground fault detection. Class 5 copper stranding (~0.20 mm wire) ensures bending radius 10–15× OD. EPR insulation stable -25°C to +90°C. Red neoprene sheath (RAL 3001) resists tear from sharp rock. Prevents stress concentration at conductor edges. FeiChun NTSCGEWÖU 6/10kV — full functional equivalent using identical semi-conductive screens, EPR insulation, neoprene extrusion. Compatible with European equipment connectors (Hitachi, Komatsu, Liebherr, ThyssenKrupp).
Technical Department
on16/03/2026

Аналог высоковольтного кабеля TF Kable NTSCGEWÖU 6/10kV: Замена польского провода в открытых разрезах РФ — FeiChun Mining Cable, КГЭ-ХЛ импортозамещение

Full technical breakdown Tele-Fonika NTSCGEWÖU 6/10kV: high-voltage trailing cable for bucket wheel excavators, draglines, drill rigs, mobile transformer substations in open-pit mining. Semi-conductive screens prevent corona discharge at 6/10kV. Splitted earth (3×16/3 configuration) enables reliable ground fault detection. Class 5 copper stranding (~0.20 mm wire) ensures bending radius 10–15× OD. EPR insulation stable -25°C to +90°C. Red neoprene sheath (RAL 3001) resists tear from sharp rock. Prevents stress concentration at conductor edges. FeiChun NTSCGEWÖU 6/10kV — full functional equivalent using identical semi-conductive screens, EPR insulation, neoprene extrusion. Compatible with European equipment connectors (Hitachi, Komatsu, Liebherr, ThyssenKrupp).
26 Min Read
Full technical breakdown Tele-Fonika OnGce 3x70+16+2x10 0.6/1kV: heavy-duty mining trailing cable for coal face machinery, LHD loaders, conveyor systems, underground infrastructure. "OnGce" = Opona (protective sheath) + nG (flame non-propagating) + c (rubber insulation) + e (screened) — complete European mine safety standard. Class 5 copper stranding (~0.20 mm wire) enables bending radius 8–12× OD. EPR insulation with conductive rubber screens above phase conductors for spark-free operation. Neoprene outer sheath (high-pressure extruded) resists tearing from rock edges and sharp underground obstacles. Temperature -25°C to +90°C. FeiChun Underground Mining Cable 0.6/1kV 3x70+16+2x10 — full functional equivalent using identical Class 5 copper, EPR insulation, conductive screens, high-pressure neoprene extrusion, certified for direct replacement in European-spec mining equipment.
Technical Department
on16/03/2026

Аналог шахтного кабеля OnGce: Замена польского кабеля 3×70+16+2×10 0.6/1kV в РФ и СНГ — инженерия подземной безопасности и надёжности — FeiChun Mining Cable

Full technical breakdown Tele-Fonika OnGce 3×70+16+2×10 0.6/1kV: heavy-duty mining trailing cable for coal face machinery, LHD loaders, conveyor systems, underground infrastructure. “OnGce” = Opona (protective sheath) + nG (flame non-propagating) + c (rubber insulation) + e (screened) — complete European mine safety standard. Class 5 copper stranding (~0.20 mm wire) enables bending radius 8–12× OD. EPR insulation with conductive rubber screens above phase conductors for spark-free operation. Neoprene outer sheath (high-pressure extruded) resists tearing from rock edges and sharp underground obstacles. Temperature -25°C to +90°C. FeiChun Underground Mining Cable 0.6/1kV 3×70+16+2×10 — full functional equivalent using identical Class 5 copper, EPR insulation, conductive screens, high-pressure neoprene extrusion, certified for direct replacement in European-spec mining equipment.
6 Min Read
Full technical breakdown Draka/Prysmian BUFLEX M (N)TSCGEWÖU 3×185+3×35/3 6/10 kV: super-heavy flexible medium-voltage cable for main power supply of giant bucket wheel excavators, stacker-reclaimers, STS container cranes, and floating docks. Weight 8+ tons/km, OD 67–73 mm, current rating ~490 A (30°C open air), voltage 6/10 kV (max operating 7.2/12 kV). Construction: 3 power cores 185 mm² tinned copper class 5 + split earth 3×(35/3)=3×11.67 mm² + 3 pilot cores, special EPR insulation type 3GI3, extruded semiconducting screens inner/outer for electric field leveling at 6/10 kV, wear-resistant PUR/rubber outer sheath 5GM5. Short-circuit current (1s) ~26.5 kA. Min bending radius 12–15× OD (dynamic super-diameter drums). Temp range -25°C to +80°C standard, special versions to -40°C. Manufacturing challenge: 70+ mm diameter and 8+ tons/km require inclined CCV tower lines preventing sag/deformation of heavy cores before insulation cure. Anhui Feichun — proven manufacturer offering full drop-in replacement with identical construction, concentricity guarantee, and sheath adaptation for existing cable-layers and motor reels.
Technical Department
on16/03/2026

BUFLEX M (N)TSCGEWÖU 3×185+3×35/3 6/10kV — Сверхтяжёлый гибкий кабель для роторных экскаваторов, стакер-реклаймеров и портовых кранов: замена FeiChun Cable

Full technical breakdown Draka/Prysmian BUFLEX M (N)TSCGEWÖU 3×185+3×35/3 6/10 kV: super-heavy flexible medium-voltage cable for main power supply of giant bucket wheel excavators, stacker-reclaimers, STS container cranes, and floating docks. Weight 8+ tons/km, OD 67–73 mm, current rating ~490 A (30°C open air), voltage 6/10 kV (max operating 7.2/12 kV). Construction: 3 power cores 185 mm² tinned copper class 5 + split earth 3×(35/3)=3×11.67 mm² + 3 pilot cores, special EPR insulation type 3GI3, extruded semiconducting screens inner/outer for electric field leveling at 6/10 kV, wear-resistant PUR/rubber outer sheath 5GM5. Short-circuit current (1s) ~26.5 kA. Min bending radius 12–15× OD (dynamic super-diameter drums). Temp range -25°C to +80°C standard, special versions to -40°C. Manufacturing challenge: 70+ mm diameter and 8+ tons/km require inclined CCV tower lines preventing sag/deformation of heavy cores before insulation cure. Anhui Feichun — proven manufacturer offering full drop-in replacement with identical construction, concentricity guarantee, and sheath adaptation for existing cable-layers and motor reels.
15 Min Read
Complete technical passport ultra-flexible screened mining cable КОГРЭШ 3×6+1×2.5+1×2.5 rated 660V 50Hz. Designation: К=Cable, О=Extra, Г=Flexible, Р=Rubber insulation/sheath, Э=Screened, Ш=Mine. Configuration: 3 power cores 6mm² (tinned copper Class 5 GOST 22483) + 1 earth 2.5mm² + 1 auxiliary/pilot 2.5mm². Construction: RTI-2-HL rubber insulation (natural/butadiene blend, -30°C standard / -50°C ХЛ cold-resistant), individual semiconductive screens RE-2 per phase (pre-emptive disconnect—methane explosion safety), polyester-reinforced central core REM-1, outer sheath oil-resistant polychloroprene RSN-1 2.5mm. Weight: 320–380 kg/km. OD: 13–16mm. Min bend radius: 3×OD (~39–48mm)—3–4× more flexible than standard mine cables. Bend cycles: 22,000 (6mm² section, ±π rad, 49N load). Manufactured per TU 16.K56.017-92 / TU 16.K180-099-2021, compliant GOST 31945-2012. Service life ≥2 years. Application: mine drill tools, perforators, lighting, mobile equipment in methane-bearing underground mines. Chinese equivalent: Feichun Cable full constructive copy GOST-compatible.
Technical Department
on13/03/2026

КОГРЭШ 3х6+1х2,5+1х2,5: вес, диаметр, паспорт PDF и полная расшифровка сверхгибкого шахтного кабеля 660В

Complete technical passport ultra-flexible screened mining cable КОГРЭШ 3×6+1×2.5+1×2.5 rated 660V 50Hz. Designation: К=Cable, О=Extra, Г=Flexible, Р=Rubber insulation/sheath, Э=Screened, Ш=Mine. Configuration: 3 power cores 6mm² (tinned copper Class 5 GOST 22483) + 1 earth 2.5mm² + 1 auxiliary/pilot 2.5mm². Construction: RTI-2-HL rubber insulation (natural/butadiene blend, -30°C standard / -50°C ХЛ cold-resistant), individual semiconductive screens RE-2 per phase (pre-emptive disconnect—methane explosion safety), polyester-reinforced central core REM-1, outer sheath oil-resistant polychloroprene RSN-1 2.5mm. Weight: 320–380 kg/km. OD: 13–16mm. Min bend radius: 3×OD (~39–48mm)—3–4× more flexible than standard mine cables. Bend cycles: 22,000 (6mm² section, ±π rad, 49N load). Manufactured per TU 16.K56.017-92 / TU 16.K180-099-2021, compliant GOST 31945-2012. Service life ≥2 years. Application: mine drill tools, perforators, lighting, mobile equipment in methane-bearing underground mines. Chinese equivalent: Feichun Cable full constructive copy GOST-compatible.
5 Min Read
Complete letter-by-letter decoding КГЭШ 3х95+1х10+3х4 (GOSH — Russian pit cable standard GOST 31945-2012): 3 power cores 95 mm² (class 5 copper), 1 earth core 10 mm², 3 control cores 4 mm², OD ~48–52 mm, weight ~800–900 kg/km, copper index ~570 kg/km, nominal voltage 1.14 kV (1140 V US), current 200 A @ 20°C base (actual ~114 A derated 0.57), oil/benzene-resistant rubber insulation (IPR/TPR), conductive rubber TП screen, bending 1.5 m flexing, temp -10/+60°C flexing. Application: electric coal shearers, continuous miners, cutting machines, underground conveyors in coal mines. Pricing: Kamskiy Kabel/Holding CSA €650–850/km, Feichun FC-KGESH €350–520/km (40–50% savings). GOST-R, EAC, ATEX explosion protection. TCO calculator for underground mining complexes.
Technical Department
on12/03/2026

Что означает маркировка КГЭШ 3х95+1х10+3х4? Расшифровка экскаваторного кабеля ГОСТ 31945-2012 для очистных комбайнов и врубовых машин

Complete letter-by-letter decoding КГЭШ 3х95+1х10+3х4 (GOSH — Russian pit cable standard GOST 31945-2012): 3 power cores 95 mm² (class 5 copper), 1 earth core 10 mm², 3 control cores 4 mm², OD ~48–52 mm, weight ~800–900 kg/km, copper index ~570 kg/km, nominal voltage 1.14 kV (1140 V US), current 200 A @ 20°C base (actual ~114 A derated 0.57), oil/benzene-resistant rubber insulation (IPR/TPR), conductive rubber TП screen, bending 1.5 m flexing, temp -10/+60°C flexing. Application: electric coal shearers, continuous miners, cutting machines, underground conveyors in coal mines. Pricing: Kamskiy Kabel/Holding CSA €650–850/km, Feichun FC-KGESH €350–520/km (40–50% savings). GOST-R, EAC, ATEX explosion protection. TCO calculator for underground mining complexes.