Tires resistant to cuts, chips, and chunking for mining of surface, operations underground and trucks of haul in quarries. Maximum reliability in the surfaces more harsh.
The operations mining undergo to commercial truck tires a conditions that no other application equals. The combination of extreme loads, surfaces abrasive rocky, sharp debris, steep gradients, speeds slow and high ambient temperatures creates a environment that expone each weakness in the design and compound of the tire. A tire that works bien in highways or in service of distribution regional tends to fail in semanas or even days in a environment mining. Understanding why the mining is so hard on the tires is the first step for select the producto proper and establish expectations actualistas about its service life.
The surfaces road in the operations mining are computhese by the same material that se extrae. In a quarrand of granito, the haul roads se construyen with granito crushed with edges angulares sharp like navajas that shortn the tread rubber in each revolution. In the mining of coal, the roads can incluir fragmentos of esquisto that embed in the grooves and perforan the belt package. In the mining of cobre, the haul roads can reach temperatures surfacees superior a 65 degrees Celsius in thees of verano, adding stress thermal end to the abuse mechanical. Unlike the highways paved that presenso a surface retheivamente uniform, the haul roads mining cambian of character with each cargo of material that se extends, createsting conditions of surface inconsistent that impiden that the tires desarrollen patterns of wear predictable.
The loads usefules in mining constantmente reach the capacity maximum of the truck and often the exceed. A truck mining sobreloaded no only wears the tires faster; changes fundamentally the distribution of stresss within the tire, concentrating forces in the zone of the shoulder and raising the temperatura internal more there of the parameters of design of the compound. The managers of fleets that invest in onboard scales and enforce cargo limits in the pala achievesn consistently best service life of tire that the operations that cargon only by estimate of volume.
Hanksugi offers multiple models of tires proper for the demands of the service mining and quarry. The tire HS76 of mixed service and all-position provides protection of sidewall and by deep for use in all-position in trucks of haul mining. The tire HS68 of traction of open shoulder usa protection against stones and geometry of by wide for traction on surfaces looses and with gravel. The tire of trailer HS66 serves a mining trucks that travelsn sections of highway among the mine and the plantas of processing. Each tire is built about a casing retreadable, allowing to the operations extraer the maximum value of the investment initial in tires.
Different operations mining generate different challenges for the tires. A tire that works bien in a mine can fail quickly in other because the type of rock, the gradient of the road of haul and the conditions of operation variesn widemente. Select the tire proper starts by entender its environment specific.
Tires of all-position, traction and trailer selected for the demands extreme of operations mining, of quarrand and of haul of addsdos. Built to resist damage by cut, chip and despperformance in the surfaces more harsh.
Tire of mixed service and all-position with tread extra deep and protection of sidewall reinforced. Casing retreadable. Engineered for performance in dry and wet in haul roads mining and surfaces quarry.
Drive tire regional of open shoulder with protection against stones and four grooves of desacople. Tread pattern of by wide that offers traction on roads of gravel loose, resisting the retention of stones in the potholes of the tread.
Tire of trailer of free axle with low rolling resistance for mining trucks that travelsn sections of highway. Eficiente in fuel consumption in paths publics and layerz of handle the transition a roads mining rustic.
The damage by cut, chip and despperformance (CCC) is the failure mode main of the tires in operations mining. Is fundamentally different of the wear of so that limita the service life in highways, and requires an approach distinto for the choice and management of tires. Understanding the mechanical of the damage CCC help to the managers of fleets a choose the tires corrects e identify cambios operatings that can to extend the service life.
When a tire wheel about the edge filudo of a rock, the rock applies a force concentratesda about a small area of the tread surface. If the force exceeds the resistance for tear of the compound of rubber, the rock short the tread createsting a small incision. With contacts repeated about thousedes of revolutions, these cuts se propagan and smalls chips of rubber se separan of the tread surface. A measurement that the cuts se profundizan and se conectan, chunks larger of compound se desprenden of the surface of the taco, exposing the structure underlying a damage accelerated. In casos severes, the despperformance can remoview tacos enteros up to the belt package in uus few hundreds of horas of operation.
The compound of rubber is the factor more mattersnt in the resistance to the CCC. The compounds standard of highway tires use formutheions more soft that prioritize grip and low rolling resistance about pavement smooth. These compounds tear easily to the exponerse a edges rocky sharp. The compounds degree mining use higher content of natural rubber, systems of cargo reinforced and chemical of crosslinking optimized to resistance for tear instead of hysteresis. The Hanksugi HS76 usa a compound formula specifically for applications of mixed service where the resistance to the CCC is critical. The compound balances the resistance for tear front to heat generation to prevent the failure mode secondary by thermal degradation that affects to the compounds too hard at low speeds.
The been of the haul roads has higher impact in the service life of the tire minera that almost any other variesble. A road of haul bien maintained with surfaces propermente leveled, drenaje controside and corona appropriate can to extend the service life of the tire between 25 and 40 percent compared with a road descuigiven dthe same material. Regar the roads for controlar the polvo also reduce the abrasive action of the particles finas about the surfaces of the tires. Rolling the material crushed for romper the edges sharp before that becomes in surface of the road reduce the action of cut that initiates the damage CCC. The operations mining that invest in cuadrillas maintenance road and cronogramas of leveling reporso consistently lower costs of tire ton of material movido that aquellas that traso the haul roads like algo secundario.
The mining trucks operate at low speeds with heavy loads in gradients. This combination generates heat internal intenso within the tire. Unlike the driving in highway, where the speed creates flujo of air that cools the surface of the tire, the mining trucks that se mueven between 24 and 40 km/h generate minimum flujo of air of cooling, while the flexing mechanical of the tire under load maximum bombea heat continuousmente toward the rubber. The temperatura in the zone of the shoulder of a tire minera cargoda to the maximum can exceed 105 degrees Celsius in a day caliente. A these temperatures, the rubber compounds startsn a degradesrse, losing resistance for tear and becoming more susceptibles to the damage CCC. The inflation pressure proper is critical for handling the heat in tires mining. The tires with pressure low flexesn more, generate more heat and failuren before. Inspect the pressure daily and considere TPMS for trucks of haul criticals.
The tire cost is uno of the five main costs operatings in most the operations mining and, a difference of diesel and the mano of construction, the tire cost is highly controlable through practices operating. The difference between a program of tires bien managed and uno mal managed in a quarrand or mine can representsr among the 30 and the 50 percent of the cost total annual in tires.
In mining, the inflation proper of the tire no only is mattersnt, sino that is the practice individual with higher impact in the control of costs of tires. A tire minera with 20% below of its inflation pressure required generates up to 40% more of heat internal. A the loads and speeds of the operations mining, ese excthat of heat degrades the compound in horas, no in kilometers. Inspect the pressure in all the positions before each shift and atienda of immediate the fugas slow. A system TPMS in a truck mining se paga only with the first-rate failure of tire preventsda. The pressurees objective should fixedrse with base in the weight actual per axle with the trucks loadeds, no in estimates.
The overload is chronic in mining. The operators of pala cargon by conteo of baldes or estimate visual, and both methods rutinariamente exceed the cargo useful qualifies of the truck. Even a 10% of overload concentrates stresss in the zone of the shoulder of the tire and increases dramatically the rate of damage CCC to the pressurear the tread with higher force against the edges rocky. Instale onboard scales or monitores of cargo in trucks of haul and thisblezca limits estrictos in the cargo qualifies. Registre data of cargo per shift and operator of pala to identify patterns of cargue that systematically overloadn the trucks. The cost of onboard scales is triroad compared with the savings in tires to the eliminater the overload chronic.
The maintenance of the road of haul is maintenance of tires. A cuadrilla dedicated of leveling that maintain the surfaces of the haul roads smooth, with corona proper and libres of rocks looses large, will save more costs of tires that any other investment individual. Riegue the roads for controlar the polvo and reduce the pressure surface. Levele the roads in a cronograma regular instead of waitr a that aparezcan quejas. Where sea posible, use material crushed more fino for the layers of rolling of the haul roads to reduce the agudeza of the contacts rocky. Limite the speeds of the vehicles in the haul roads to reduce the energy of the impacts rocky about the tread. A road bien maintained can to extend the service life of the tire up to a 40%.
A tire casing minera retreadable can save among the 40 and 60 percent of the cost of a tire new. But the casings should removese before that the tread wears up to the belt package. In mining, where the damage CCC can exponer quickly the belts in zones located, esto implica monitorear the been of the tires with higher frequency that in highway applications. Inspect the tires weekly searching cuts deeps that se acerquen to the depth of the belts and remove the tires before the damage located comprometa the casing. Etiquete the tires removesdas with the number of the truck, the position and the reason of the removal, for that the workshop of retreading pueda evaluateste each casing with contexto operating complete. Visit our page of retreading to learn the details about the criterios of acceptance casings of Hanksugi.
This guide covers the measurements of tires of truck commercial used in vehicles mining road, no the tires gigbefore off-highway used in trucks of haul in tajos. If its mining trucks operate on routes publics between sites mining and plantas of processing, these are the measurements and models that servesn a its operation.
| Measurement of Tire | Application | Models Hanksugi | Details |
|---|---|---|---|
| 11R22.5 | Address, traction and trailer in trucks of haul mining | HS68, HS66 | View Guide of Measurement |
| 11R24.5 | Traction and trailer in configurations mining heavy | HS68 | View Guide of Measurement |
| 295/75R22.5 | Traction and trailer in trucks mine-highway | HS68, HS66 | View Guide of Measurement |
| 295/80R22.5 | All position for operations mining in Egypt | HS76 | View Guide of Measurement |
| 285/75R24.5 | Traction in trucks vocational mining of axle tandem | HS68 | View Guide of Measurement |
The choice of tires mining depends of the tipo specific of rock, the conditions of the road of haul and the configuration of the truck in its operation. Our team of fleet solutions can visitar its mine or quarrand for evaluateste the conditions and recommend the configuration optimal of tires for its trucks. Contact us for a tire cost analysis specific for its site.
Questions common about tires for mining trucks, applications in quarries and resistance to cuts, chips, and chunking.
The tires for mining trucks use compounds of by resistant to cuts, chips, and chunking that withstand sharp rocky surfaces, deeper tread depths for longer service life at low speeds, reinforced sidewall construction that resists impact damage e load indexes higher for mineral loads concentratesdas. The rubber compounds are formutheed to resist the abrasive action of the rock crushed, that wears compounds standard of highway tires at at an accelerated rate.
The service life of the tires mining varies dramatically according to the operation. The mining of surface with haul roads bien maintained can reach between 50.000 and 80,000 km. The operations of quarrand with addsdo filoso typically registran between 20.000 and 50.000 km. The factors main are the agudeza of the rock, the been of the road of haul, the practices of cargue and the speed of operation. Medir the service life of the tire in horas of service tends to be more meanstivo that in kilometers in mining, since the speeds are low.
The mining trucks road typically use tires 11R22.5, 11R24.5 or 295/80R22.5. These are measurements standard of truck commercial for vehicles Clase 7 and Class 8 that transporso material on routes publics between mines, quarries and plantas of processing. These are distintas of the enormes trucks of haul off-highway used within the tajos mining, that use tires gigbefore in measurements like 27.00R49.
The damage CCC occurs when edges rocky sharp shortn the tread rubber, starting smalls piezas with each contact. The surface of the road often is computhis by rock crushed with edges angulares sharp. A measurement that wheel the tire, the tacos contacso these edges, accumutheing cuts that eventually se propagan in chips and chunking higher. The quarries of granito and bashigh are particularly aggressive debido to the extrema hardness and agudeza of the addsdo.
Yes, the tires for mining trucks can be retreaded if the casing passes inspection. The key is remove the tires before that the tread wears up to the belt package and maintain the inflation proper throughout the service life. A casing mining retreadable can save among the 40 and the 60 percent of the cost of a tire new. Visit our page of retreading for more details.
The most effective strategies are: maintain proper inflation pressure, adapt the choice of tires to the conditions of the mine, maintain the haul roads to reduce exposure to sharp rocks, do comply the cargo limits useful in the pala, implement a tire monitoring program of tires and preserve casings for retreading. The maintenance of the road alone can to extend the service life between 25 and 40 percent. Combineds, these practices can reduce the cost of tire ton between 30 and 50 percent compared with programs no manageds.