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Predictive Reliability Assessment of Loading and Transport Modules of Tunneling Equipment during Construction of Road Tunnels
Available online at www.sciencedirect.com Available online at www.sciencedirect.com
ScienceDirect ScienceDirect Procedia Engineering 00 (2017)000–000
Available online at www.sciencedirect.com
ScienceDirect
Procedia Engineering 00 (2017)000–000
www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia
Procedia Engineering 206 (2017) 1661–1666
International Conference on Industrial Engineering, ICIE 2017 International Conference on Industrial Engineering, ICIE 2017
Predictive Reliability Assessment of Loading and Transport Predictive ReliabilityEquipment Assessmentduring of Loading and Transport Modules of Tunneling Construction of Road Modules of Tunneling Equipment Tunnelsduring Construction of Road Tunnels A. Nosenko, A. Domnitskiy, E. Shemshura* A. Nosenko, A. Domnitskiy, E. Shemshura* Platov South-Russian State Polytechnic University (NPI), 132, St. Prosvescheniya, Rostov region, Novocherkassk, 346428, Russia Platov South-Russian State Polytechnic University (NPI), 132, St. Prosvescheniya, Rostov region, Novocherkassk, 346428, Russia
Abstract Abstract Designs of loading and transport modules applied for the construction of road tunnels are considered. The distinctive feature of modules from conventional designs is the applied use of wedge elements in combination with powerThe hydraulic cylinders Designs of loading and transport modules for theworking construction of road tunnels are considered. distinctive featureasofa drive. modules from conventional designs is the use of wedge working elements in combination with power hydraulic cylinders as a Basing drive. on health monitoring of the tunneling equipment expected values of loading modules reliability indicators are defined. The forecast is carried out based the known regularities of change in loading the reliability analogs and prototypes of the Basing on health monitoring of the on tunneling equipment expected values of modulesofreliability indicators are defined. investigated andouttheir elements. unitsregularities and parts of of change modulesinlimiting reliability used and for the assessment of The forecast modules is carried based on the The known the reliability of are analogs prototypes of the reliability. investigated modules and their elements. The units and parts of modules limiting reliability are used for the assessment of The decision on the efficiency of application and feasibility of the studied designs of loading and transport modules is made on reliability. the of simulation of their of operation and and is determined of operational the account Thebasis decision on the efficiency application feasibility by of the the magnitude studied designs of loadingcosts and with transport modulesofisstochastic made on nature of of thesimulation flow of module elements failures. the basis of their operation and is determined by the magnitude of operational costs with the account of stochastic © 2017 The Published by Elsevier B.V. nature theAuthors. flow of module elements failures. © 2017ofThe Authors. Published by Elsevier Ltd. Peer-review under responsibility of the scientific of the International Conference on Industrial Engineering. © 2017 The Authors. Published by Elsevier B.V. committee Peer-review under equipment, responsibility of the scientific committee of the International Conference on Industrial Engineering Keywords: tunneling road tunnels, loading transportof modules, reliability, reliability assessment. Peer-review under responsibility of the scientific and committee the International Conference on Industrial Engineering. Keywords: tunneling equipment, road tunnels, loading and transport modules, reliability, reliability assessment.
1. Introduction 1. Introduction The prospect of transport tunnels construction is provided by the system of development of highways in the country. Driving of tunnels is thetunnels most difficult type ofisconstruction Miningofmethod is used of forhighways tunneling in in the The prospect transport construction provided byworks. the system development rock and Driving semi rock with coefficient hardness 2 according Professor Protodjakonov [1–3].inThe country. tunnels is the most of difficult typeexceeding of construction works.toMining method is used forscale tunneling the rock and semi rock with coefficient of hardness exceeding 2 according to Professor Protodjakonov scale [1–3]. The * Corresponding author. Tel.: +7-918-527-3227. E-mail address:author. [email protected] * Corresponding Tel.: +7-918-527-3227.
E-mail address: [email protected] 1877-7058 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the scientific committee of the International Conference on Industrial Engineering . 1877-7058 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the scientific committee of the International Conference on Industrial Engineering .
1877-7058 © 2017 The Authors. Published by Elsevier Ltd. Peer-review under responsibility of the scientific committee of the International Conference on Industrial Engineering. 10.1016/j.proeng.2017.10.694
1662 2
A. Nosenko et al. / Procedia Engineering 206 (2017) 1661–1666 A.C. Nosenko et al. / Procedia Engineering 00 (2017) 000–000
basic methods of rock development in a face are: mechanized, in which the working tools of rock failure are cutters, mills and milling cutters, placed on the operational parts of mining machines, and drilling and blasting, in which caving in rock is accomplished by explosions. In both cases the use of loading and transport modules as part of tunneling equipment for the construction of transport tunnels proved effective [4,5]. 2. Design of loading and transport modules Loading and transport modules are considered to be mechanisms performing the function of loading stacks of loose rock mass and its removal beyond the bottom zone. Loading and transport modules are characterized by a variety of constructive forms, numerous options of combining loading and transport components. A promising way to improve the designs of mining machinery is the development of hydraulic loading bodies with wedge working elements [6–9]. The relevance of these developments is due to simplification of conventional kinematic design of the working elements drive. The use of a hydraulic actuator allows to reduce the number of mechanical transmissions. In turn application of a wedge also makes it possible to do without gear groups and to use the least number of power hydraulic cylinders for the accomplishment of movements [7]. At the present time to increase the productivity of loading rock mass when driving tunnels and to implement more efficient modes of operation, a number of innovative solutions for loading bodies with wedge loading arms (fig. 1–3) have been developed [10].
Fig. 1. Loading body with two hydraulic cylinders and synchronizing shaft. 1 – loading arms, 2 – hydraulic cylinders, 3 – drive plate, 4 – feeder plate, 5 – hydraulic control valves, 6 – synchronizing shaft
The decision on possibility of introduction of various loading and transport modules designs in the production process are based on the predictive assessment of reliability and efficiency of their application. 3. Reliability Estimation and Forecasting Predicting reliability of loading and transport modules is based on the results of industrial health monitoring of mining equipment in the construction of transport tunnels by "Tonneldorstroy" and excavations at the Eastern Donbass coal-mining enterprises. The monitoring revealed the most significant equipment failures, made it possible
A. Nosenko et al. / Procedia Engineering 206 (2017) 1661–1666 A.C. Nosenko et al. / Procedia Engineering 00 (2017) 000–000
1663 3
to compile the list of parts and components that affect reliability, to determine actual indicators of working capacity and maintainability [11–15].
Fig. 2. Loading body of MPNK car pilot sample 1 – inclined feeder, 2 – loading arms, 3 – hydraulic cylinder, 4 – stock, 5 – crank, 6 – conveyor
Fig. 3. Multi-grip loading module with counter motion of key and peripheral grips. 1 – inclined feeder, 2 – principal grip, 3 – peripheral grip, 4 – cylinder, 5 – hydraulic cylinder stock, 6 – lever, 7 – leverage, 8, 9 – bearing, 10 – conveyor, 11 – stoppers.
Statistical analysis of information on the efficiency of loading transport modules allows to receive the parameters of distribution of MTBF λ and recovery time of wearing components and parts μ [16] as well as their predicted values for the investigated designs of loading modules (Table 1). As it is hard to predict reliability the range of calculated elements is limited by the group of parts and components "limiting reliability". Besides, on the basis of the analysis of long-term health monitoring [15] of tunneling cars of various designs reliability indicators are established (Table 2).
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A. Nosenko / Procedia Engineering 206 (2017) 1661–1666 A.C. Nosenko et al.et/ al. Procedia Engineering 00 (2017) 000–000
Table 1. Expected reliability indicators of loading modules. Elements (knots) limiting reliability
Specified life
MTBF
VO,
ТO ,
3
m ·10
3
3
m ·10
3
Recovery time, ТV,
·10-3
h
Loading unit with two hydraulic cylinders and a synchronizing shaft (Fig. 1) Feeder
100
20,0
3,00
0,050
0,33
Plates (2 pieces)
20
20,0
2,00
0,100
0,50
Loading arms (2 pieces)
20
20,0
2,00
0,100
0,50
Hydraulic cylinders (2 pieces)
25
8,0
3,00
0,250
0,33
Hydraulic cylinder seals
20
7,0
0,75
0,143
1,33
Hydraulic control valve
20
6,5
3,00
0,154
0,33
2,29
0,797
0,44
Loading module as a whole:
Loading module with loading arms rigidly connected to the housings of hydraulic cylinders (Fig. 2) Loading arms (2 pieces)
20
20,0
2,00
0,100
0,50
Joints (2 pieces)
20
7,6
12,0
0,262
0,08
Hydraulic control valve
20
6,5
3,00
0,154
0,33
Hydraulic cylinder seals
20
7,0
0,75
0,143
1,33
Hydraulic cylinders (2 pieces)
25
8,0
3,00
0,250
0,33
Feeder
100
20,0
3,00
0,050
0,33
3,96
0,709
0,25
Loading module as a whole: Multi-grip loading module with counter motion of key and peripheral grips (Fig. 3) Feeder
100
20,0
3,00
0,050
0,33
Grips (6 pieces)
20
20,0
2,00
0,300
0,50
Hydraulic cylinders (2 pieces)
25
8,0
3,00
0,250
0,33
Hydraulic cylinder seals
20
7,0
0,75
0,143
1,33
Hydraulic control valve
20
6,5
Loading module as a whole:
3,00
0,154
0,33
2,35
0,897
0,43
4. Efficiency Assessment of the loading and transport modules design Predictive reliability parameters obtained are used as input data for simulation of the process of mining equipment operation in tunnel construction [17]. Modeling of loading and transport modules workflows and maintenance processes is carried out with the account of stochastic nature of flows of failures and restoration of healthy state of the module individual elements and aimed at determining operational costs. Mathematical models of loading and transport modules efficiency, time of auxiliary operations, forecasting of volumes and range of spare parts supply, technical operations costs are used in the development of the simulation algorithm [18-22]. The result of the simulation allows to determine the most efficient design of loading and transport module for specific production conditions. 5. Conclusions For the investigated loading and transport modules designs expected reliability indicators have been defined on the basis of data on regularities of change in reliability of their analogs and prototypes of their elements.
A. Nosenko et al. / Procedia Engineering 206 (2017) 1661–1666 A.C. Nosenko et al. / Procedia Engineering 00 (2017) 000–000
1665 5
Technical and economic assessment of efficiency of loading and transport modules designs as part of tunneling equipment for construction of road tunnels is based on modeling process of operation with the account of expected reliability indicators. Economic feasibility of application of loading and transport module of a certain design can be defined considering quality of spare parts supplies and maintenance of tunneling cars. Table 2. Principal reliability indicators of loading and transport modules of tunneling cars. MTBF
Standard deviation ТO,
ТО , h
То
Recovery time, ТV , h
В = 1,8;
4,5
0,25
3,5
В = 2,0
3,2
0,31
2,7
3,7
0,27
4,2
В 1,0;
10,2
0,20
1,5
В 1,0
10,5
0,20
1,6
В 1,0;
7,8
0,21
2,1
В 1,0
8,6
0,17
1,8
Transport module – wedge reloader
5,1
0,03
2,1
Transport module – scraper conveyor
15.0
0,07
1,0
Functional elements of loading and transport modules Loading module with arms (type PNB-2) - feeder width B, m:
Loading module with arms (type PNB-3D) - feeder width B, m: В = 2,7 Loading module with wedge loading frame - feeder width B, m:
Loading module with wedge loading arms - feeder width B, m:
References [1] A.C. Nosenko, E.A. Shemshura, A.A. Domnitskiy, Formalization of rеquirements to road tunnels, Procedia Engineering. 150 (2016) 1914– 1918. [2] A.C. Nosenko, R.V. Kargin, E.A. Shemshura, A.A. Domnitskiy, Tunnel classification for general-purpose highway, Roads and bridges. 33/1 (2015) 217–233. [3] Е.А. Shemshura, R.V. Kargin, А.А. Domnitskiy, Development of regulatory requirements for road tunnels. Internet-magazine Naukovedenie. 5 (2014). http://naukovedenie.ru/PDF/27KO514.pdf. [4] A.S. Nosenko, А.А. Domnitskiy, R.V. Kargin, Е.А. Shemshura, About the choice in the machines set for transport tunnel construction using mining heading technology, Roads and bridges. 32 (2014) 40–54. [5] A.C. Nosenko, E.A. Shemshura, A.A. Domnitskiy, Construction of road tunnels continuous heading machine technologies application, University news, North-Caucasian region, Technical sciences series. 3 (2016) 63–70. [6] A.V. Otrokov, G.Sh. Khazanovich, I.E. Kolesnichenko, V.G. Khazanovich, To a question of a systematization of designs and kinematic schemes of loading organs of continuous action, Modern problems of science and education. 4 (2014). https://www.scienceeducation.ru/pdf/2014/4/87.pdf. [7] V.G. Khazanovich, Development of desingns classification of working bodies of mining machines with wedge loading and transporting elements, Mining equipment and electromechanics. 4 (2013) 31–37. [8] A.C. Nosenko, R.V. Kargin, V.G. Khazanovich, V.V. Nosenko, Development of hydraulic modules of loading and transport systems, Mining equipment and electromechanics. 4 (2009) 13–16. [9] A.C. Nosenko, E.A. Shemshura, A designing of the worker units of mines loading machines based on main prediction indicators of the safety, University news, North-Caucasian region, Technical sciences series. 2 (2009) 71–77. [10] G.Sh. Khazanovich, Tunneling loading and transport modules and coal mines subsystems on the basis of wedge hydraulic working units, URGTU (NPI), Novocherkassk, 2001. [11] A.C. Nosenko, E.A. Shemshura, A.A. Domnitskiy, Evaluation of reliability and technical conditions of tunneling machines, Procedia Engineering. 129 (2015) 624–628. [12] V.G. Khazanovich, Reliability and operating effectiveness evaluation of selective heading machines, Mining equipment and electromechanics. 5 (2011) 2–6. [13] A.C. Nosenko, A.A. Domnitskiy, Analysis of efficiency of application of mine loaders, Engineering Journal of Don. 1 (2016). http://ivdon.ru/ru/magazine/archive/n1y2016/3515. [14] A.C. Nosenko, A.A. Domnitskiy, I.A. Nosenko, Results of production researches of reliability of tunnelling combines of selective action, Engineering Journal of Don. 1 (2016). http://www.ivdon.ru/ru/magazine/archive/n1y2016/3501.
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[15] A.S. Nosenko, E.A. Shemshura, Reliability and operating effectiveness of tunneling machines, URGTU (NPI), Novocherkassk, 2014. [16] A.S. Nosenko, V.G. Khazanovich, E.A. Shemshura, V.V. Nosenko, The choose of the equipment for carrying out of preparing manufactures based on actual indicators of reliability, Mining equipment and electromechanics. 7 (2009) 8–11. [17] A.S. Nosenko, А.А. Domnitskiy, R.V. Kargin, Е.А. Shemshura, V.V. Nosenko, Application of modular configuration for heading machines in road tunnels construction, Engineering Journal of Don. 1 (2015). http://www.ivdon.ru/ru/magazine/archive/n1p2y2015/2832. [18] E.A. Shemshura, The value of the effectiveness of the drifting equipments, Mining Informational and Analytical Bulletin (scientific and technical journal). 5 (2009) 223–226. [19] E.A. Shemshura, Optimization of ways of heading machines operation system, Engineering Journal of Don. 4 (2013). http://www.ivdon.ru/magazine/archive/n4y2013/2001. [20] V.G. Khazanovich, Improving technical operational efficiency of continuous loader machines, Mining equipment and electromechanics. 5 (2013) 9–14. [21] E.Y. Voronova, Working out the mathematical model of forming cutting system productivity, Mining Informational and Analytical Bulletin (scientific and technical journal). 5 (2014) 162–171. [22] A.S. Nosenko, V.G. Khazanovich, V.V. Nosenko, A.A. Filonenko, Servise provision of exploitation of mining loading and heading machines, Mining Informational and Analytical Bulletin (scientific and technical journal). 2 (2014) 190–197.
ScienceDirect ScienceDirect Procedia Engineering 00 (2017)000–000
Available online at www.sciencedirect.com
ScienceDirect
Procedia Engineering 00 (2017)000–000
www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia
Procedia Engineering 206 (2017) 1661–1666
International Conference on Industrial Engineering, ICIE 2017 International Conference on Industrial Engineering, ICIE 2017
Predictive Reliability Assessment of Loading and Transport Predictive ReliabilityEquipment Assessmentduring of Loading and Transport Modules of Tunneling Construction of Road Modules of Tunneling Equipment Tunnelsduring Construction of Road Tunnels A. Nosenko, A. Domnitskiy, E. Shemshura* A. Nosenko, A. Domnitskiy, E. Shemshura* Platov South-Russian State Polytechnic University (NPI), 132, St. Prosvescheniya, Rostov region, Novocherkassk, 346428, Russia Platov South-Russian State Polytechnic University (NPI), 132, St. Prosvescheniya, Rostov region, Novocherkassk, 346428, Russia
Abstract Abstract Designs of loading and transport modules applied for the construction of road tunnels are considered. The distinctive feature of modules from conventional designs is the applied use of wedge elements in combination with powerThe hydraulic cylinders Designs of loading and transport modules for theworking construction of road tunnels are considered. distinctive featureasofa drive. modules from conventional designs is the use of wedge working elements in combination with power hydraulic cylinders as a Basing drive. on health monitoring of the tunneling equipment expected values of loading modules reliability indicators are defined. The forecast is carried out based the known regularities of change in loading the reliability analogs and prototypes of the Basing on health monitoring of the on tunneling equipment expected values of modulesofreliability indicators are defined. investigated andouttheir elements. unitsregularities and parts of of change modulesinlimiting reliability used and for the assessment of The forecast modules is carried based on the The known the reliability of are analogs prototypes of the reliability. investigated modules and their elements. The units and parts of modules limiting reliability are used for the assessment of The decision on the efficiency of application and feasibility of the studied designs of loading and transport modules is made on reliability. the of simulation of their of operation and and is determined of operational the account Thebasis decision on the efficiency application feasibility by of the the magnitude studied designs of loadingcosts and with transport modulesofisstochastic made on nature of of thesimulation flow of module elements failures. the basis of their operation and is determined by the magnitude of operational costs with the account of stochastic © 2017 The Published by Elsevier B.V. nature theAuthors. flow of module elements failures. © 2017ofThe Authors. Published by Elsevier Ltd. Peer-review under responsibility of the scientific of the International Conference on Industrial Engineering. © 2017 The Authors. Published by Elsevier B.V. committee Peer-review under equipment, responsibility of the scientific committee of the International Conference on Industrial Engineering Keywords: tunneling road tunnels, loading transportof modules, reliability, reliability assessment. Peer-review under responsibility of the scientific and committee the International Conference on Industrial Engineering. Keywords: tunneling equipment, road tunnels, loading and transport modules, reliability, reliability assessment.
1. Introduction 1. Introduction The prospect of transport tunnels construction is provided by the system of development of highways in the country. Driving of tunnels is thetunnels most difficult type ofisconstruction Miningofmethod is used of forhighways tunneling in in the The prospect transport construction provided byworks. the system development rock and Driving semi rock with coefficient hardness 2 according Professor Protodjakonov [1–3].inThe country. tunnels is the most of difficult typeexceeding of construction works.toMining method is used forscale tunneling the rock and semi rock with coefficient of hardness exceeding 2 according to Professor Protodjakonov scale [1–3]. The * Corresponding author. Tel.: +7-918-527-3227. E-mail address:author. [email protected] * Corresponding Tel.: +7-918-527-3227.
E-mail address: [email protected] 1877-7058 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the scientific committee of the International Conference on Industrial Engineering . 1877-7058 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the scientific committee of the International Conference on Industrial Engineering .
1877-7058 © 2017 The Authors. Published by Elsevier Ltd. Peer-review under responsibility of the scientific committee of the International Conference on Industrial Engineering. 10.1016/j.proeng.2017.10.694
1662 2
A. Nosenko et al. / Procedia Engineering 206 (2017) 1661–1666 A.C. Nosenko et al. / Procedia Engineering 00 (2017) 000–000
basic methods of rock development in a face are: mechanized, in which the working tools of rock failure are cutters, mills and milling cutters, placed on the operational parts of mining machines, and drilling and blasting, in which caving in rock is accomplished by explosions. In both cases the use of loading and transport modules as part of tunneling equipment for the construction of transport tunnels proved effective [4,5]. 2. Design of loading and transport modules Loading and transport modules are considered to be mechanisms performing the function of loading stacks of loose rock mass and its removal beyond the bottom zone. Loading and transport modules are characterized by a variety of constructive forms, numerous options of combining loading and transport components. A promising way to improve the designs of mining machinery is the development of hydraulic loading bodies with wedge working elements [6–9]. The relevance of these developments is due to simplification of conventional kinematic design of the working elements drive. The use of a hydraulic actuator allows to reduce the number of mechanical transmissions. In turn application of a wedge also makes it possible to do without gear groups and to use the least number of power hydraulic cylinders for the accomplishment of movements [7]. At the present time to increase the productivity of loading rock mass when driving tunnels and to implement more efficient modes of operation, a number of innovative solutions for loading bodies with wedge loading arms (fig. 1–3) have been developed [10].
Fig. 1. Loading body with two hydraulic cylinders and synchronizing shaft. 1 – loading arms, 2 – hydraulic cylinders, 3 – drive plate, 4 – feeder plate, 5 – hydraulic control valves, 6 – synchronizing shaft
The decision on possibility of introduction of various loading and transport modules designs in the production process are based on the predictive assessment of reliability and efficiency of their application. 3. Reliability Estimation and Forecasting Predicting reliability of loading and transport modules is based on the results of industrial health monitoring of mining equipment in the construction of transport tunnels by "Tonneldorstroy" and excavations at the Eastern Donbass coal-mining enterprises. The monitoring revealed the most significant equipment failures, made it possible
A. Nosenko et al. / Procedia Engineering 206 (2017) 1661–1666 A.C. Nosenko et al. / Procedia Engineering 00 (2017) 000–000
1663 3
to compile the list of parts and components that affect reliability, to determine actual indicators of working capacity and maintainability [11–15].
Fig. 2. Loading body of MPNK car pilot sample 1 – inclined feeder, 2 – loading arms, 3 – hydraulic cylinder, 4 – stock, 5 – crank, 6 – conveyor
Fig. 3. Multi-grip loading module with counter motion of key and peripheral grips. 1 – inclined feeder, 2 – principal grip, 3 – peripheral grip, 4 – cylinder, 5 – hydraulic cylinder stock, 6 – lever, 7 – leverage, 8, 9 – bearing, 10 – conveyor, 11 – stoppers.
Statistical analysis of information on the efficiency of loading transport modules allows to receive the parameters of distribution of MTBF λ and recovery time of wearing components and parts μ [16] as well as their predicted values for the investigated designs of loading modules (Table 1). As it is hard to predict reliability the range of calculated elements is limited by the group of parts and components "limiting reliability". Besides, on the basis of the analysis of long-term health monitoring [15] of tunneling cars of various designs reliability indicators are established (Table 2).
1664 4
A. Nosenko / Procedia Engineering 206 (2017) 1661–1666 A.C. Nosenko et al.et/ al. Procedia Engineering 00 (2017) 000–000
Table 1. Expected reliability indicators of loading modules. Elements (knots) limiting reliability
Specified life
MTBF
VO,
ТO ,
3
m ·10
3
3
m ·10
3
Recovery time, ТV,
·10-3
h
Loading unit with two hydraulic cylinders and a synchronizing shaft (Fig. 1) Feeder
100
20,0
3,00
0,050
0,33
Plates (2 pieces)
20
20,0
2,00
0,100
0,50
Loading arms (2 pieces)
20
20,0
2,00
0,100
0,50
Hydraulic cylinders (2 pieces)
25
8,0
3,00
0,250
0,33
Hydraulic cylinder seals
20
7,0
0,75
0,143
1,33
Hydraulic control valve
20
6,5
3,00
0,154
0,33
2,29
0,797
0,44
Loading module as a whole:
Loading module with loading arms rigidly connected to the housings of hydraulic cylinders (Fig. 2) Loading arms (2 pieces)
20
20,0
2,00
0,100
0,50
Joints (2 pieces)
20
7,6
12,0
0,262
0,08
Hydraulic control valve
20
6,5
3,00
0,154
0,33
Hydraulic cylinder seals
20
7,0
0,75
0,143
1,33
Hydraulic cylinders (2 pieces)
25
8,0
3,00
0,250
0,33
Feeder
100
20,0
3,00
0,050
0,33
3,96
0,709
0,25
Loading module as a whole: Multi-grip loading module with counter motion of key and peripheral grips (Fig. 3) Feeder
100
20,0
3,00
0,050
0,33
Grips (6 pieces)
20
20,0
2,00
0,300
0,50
Hydraulic cylinders (2 pieces)
25
8,0
3,00
0,250
0,33
Hydraulic cylinder seals
20
7,0
0,75
0,143
1,33
Hydraulic control valve
20
6,5
Loading module as a whole:
3,00
0,154
0,33
2,35
0,897
0,43
4. Efficiency Assessment of the loading and transport modules design Predictive reliability parameters obtained are used as input data for simulation of the process of mining equipment operation in tunnel construction [17]. Modeling of loading and transport modules workflows and maintenance processes is carried out with the account of stochastic nature of flows of failures and restoration of healthy state of the module individual elements and aimed at determining operational costs. Mathematical models of loading and transport modules efficiency, time of auxiliary operations, forecasting of volumes and range of spare parts supply, technical operations costs are used in the development of the simulation algorithm [18-22]. The result of the simulation allows to determine the most efficient design of loading and transport module for specific production conditions. 5. Conclusions For the investigated loading and transport modules designs expected reliability indicators have been defined on the basis of data on regularities of change in reliability of their analogs and prototypes of their elements.
A. Nosenko et al. / Procedia Engineering 206 (2017) 1661–1666 A.C. Nosenko et al. / Procedia Engineering 00 (2017) 000–000
1665 5
Technical and economic assessment of efficiency of loading and transport modules designs as part of tunneling equipment for construction of road tunnels is based on modeling process of operation with the account of expected reliability indicators. Economic feasibility of application of loading and transport module of a certain design can be defined considering quality of spare parts supplies and maintenance of tunneling cars. Table 2. Principal reliability indicators of loading and transport modules of tunneling cars. MTBF
Standard deviation ТO,
ТО , h
То
Recovery time, ТV , h
В = 1,8;
4,5
0,25
3,5
В = 2,0
3,2
0,31
2,7
3,7
0,27
4,2
В 1,0;
10,2
0,20
1,5
В 1,0
10,5
0,20
1,6
В 1,0;
7,8
0,21
2,1
В 1,0
8,6
0,17
1,8
Transport module – wedge reloader
5,1
0,03
2,1
Transport module – scraper conveyor
15.0
0,07
1,0
Functional elements of loading and transport modules Loading module with arms (type PNB-2) - feeder width B, m:
Loading module with arms (type PNB-3D) - feeder width B, m: В = 2,7 Loading module with wedge loading frame - feeder width B, m:
Loading module with wedge loading arms - feeder width B, m:
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