Dump trucks

A dragline at Atlantic Richfield s Black Thunder strip mine in Gillette, Wyoming, loads coal into a dump truck. The coal is transported to cities around the country where it is burned to generate electricity. (Corbis-Bettmannj... 

My son worked at a country club north of here, and I saw what they did. They were putting diazinon on. It rained, and it killed all of the ducks at the country club. The country club didn t want anyone to know about it, so they hired him [Walter s son] to put them all in a dump truck and take them away. And I m thinking, geez, you know there s some really horrible environmental effects here. Obviously, if it kills ducks, it kills fish too. It says that on the bag [of pesticide], but you know you don t pay much attention to that. StiU, it goes down the drain. I want a nice looking lawn, but I don t want to endanger any [wildlife]. 

Foster-Miller has developed robotics technologies with applications to environmental remediation. These robots include FERRET, a materials handling robot Mini-Mucker, a remotely operated dump truck Lemming, a robot designed for the retrieval of unexploded ordnance and TALON, used for explosives detection and ordnance removal. Foster-MiUer can also custom-design robots for specialized tasks. Foster-MiUer s robotics technologies are commercially available. 

Construction Procedure. Paving with a sulfur—asphalt hot mix is exactly the same as with asphalt. Conventional dump trucks are used to haul the hot mix from the asphalt plant to the road. There the mix is spread with standard pavement equipment and compacted with conventional rollers. Measurements on the completed pavements verify that sulfur asphalt mixes have good workability and are virtually indistinguishable from conventional asphalt. 

The stacker belt conveys the wetted processed soil from the conditioner to a dump truck. 

Pillow tanks, constructed of polymers and heavy fabrics, are usually used to store oil recovered on land. These are placed on a solid platform so that rocks cannot puncture the tank when full. Pillow tanks are also sometimes used on the decks of barges and ships to hold oil recovered at sea. Oil recovered on land is often stored in stationary tanks built for other purposes, and in dump trucks and modular containers, lined with plastic. Recovered oil can also be temporarily stored in pits or berms lined with polymer sheets, although this open type of storage is not suitable for volatile oils. 

Figure 4.5. A tracked hydraulic face shovel loading a dump truck (by courtesy of Brpyt Rockloader Ltd.)...

Haulage is a major variable cost in producing limestone products. The most widely used vehicle for hauling rock from the quarry face to the primary crusher is the rigid-bodied dump truck, which is available in sizes ranging from 15 to over 150 tonnes capacity. Articulated dump trucks are more manoeuvrable and are often favoured in smaller quarries. 

A relatively recent trend is to install in-pit crushers (Fig. 4.7). These may be fed directly from the quarry face by rubber-tyred shovels in a load-and-carry operation. The crushed rock is transported to the processing plant by conveyers, which generally have lower capital and operating costs than dump trucks. 

However, the greatest tonnage of limestone is stored on the ground in uncovered stockpiles. Most stockpiles are fed by an elevated conveyer, resulting in a conical shape. Radial elevated conveyers can service three or four stockpiles, each consisting of a different grade of stone. Alternatively, stone can be transported to the stockpile by dump truck or shovel. 

Stoddard solvent, used in industrial paints for dump trucks, was present in the paint booth at concentrations between 7.0 and 12.0 ppm (41.2-70.7 mg/m as determined by personal sampling apparatus however, this was considerably below the threshold limit value (time-weighted average) of 100 ppm for occupational safety (Bradley and Bodsworth 1983). 

Hot materials, such as asphalt, can cause serious thermal bums if contacted with parts of the body. The television show Rescue 911 highhghted a rescne operation that involved hot asphalt. A dump truck used to haul solid hot asphalt to patch holes in the road collided with a car. As a result of the collision, the load of hot asphalt was dumped into the car, covering the driver to the point that he conld not escape. Before rescuers could remove the driver, he suffered severe second- and third-degree thermal bums from the hot asphalt. 

In many metropolitan areas, the RCM source is from existing Portland cement concrete curb, sidewalk and driveway sections that may or may not be lightly reinforced. The RCM is usually removed with a backhoe or pay loader and is loaded into dump trucks for removal from the site. The RCM excavation may include 10-30% sub-base soil material and asphalt pavement. Therefore, the RCM is not pure Portland cement concrete, but a mixture of concrete, soil, and small quantities of bituminous concrete [159-161]. 

The plant design allows for the future construction of a conveyor to carry the washed oxide directly to the concentrate storage shed. At present, the washed oxide falls into a dump truck that the operator empties once or twice a shift. Big River Zinc decided to delay the installation of a conveyor until the process has been proven and the plant production reached a higher level. We are also evaluating possible means of adding the washed oxide directly to the leach circuit. 

Estimate the volume of the earth that has to be removed to make room for the 60-mi-long, 24-ft-diameter, concrete-lined water tunnel. Also, investigate the capacity of typical dump trucks used in removal of earth materials. 

Coal-carrying vehicles are typically end-dump trucks with a carrying capacity of roughly 25-50 tons. Truck delivery is used extensively for small power plants in the eastern United States. 

Examples of the types of vehicles that are subject to the FMCSRs include (but are not limited to) straight trucks, pick-up trucks with trailers attached, and construction vehicles (dump trucks, cement mixers, etc.). 

Dump truck liner of UHMWPE, an example of an industrial application for the polymer. 

The haul trucks can be standard or semitrailer end-dump trucks, horizontal-discharge trucks or bottom-dump trailers. The end-dump trucks are the ones most commonly used throughout the world. The capacity of the standard end-dump truck is usually up to 20 tonnes, while the capacity of the semitrailer truck can go up to usually 25 tonnes. They discharge the hot asphalt directly to the paver hopper through an automatic tailgate opening by raising the truck bed. 

Most conventional land-based contractors equipment can be employed on the shore-based aspects of coastal and maritime works (Figures 5.1 to 5.3). Normal safety risk assessment applies to the use of this equipment, but some items of plant and their use require specific site-based consideration. An example of this is the use of dump trucks on beaches. This particular equipment is susceptible to variable ground conditions and can easily overturn if a patch of soft sand is hit. 

Sliding Mode Control for Path Tracking of Underground Mining Articuiated Dump Truck... 

In modern advanced underground mine, the applications of articulated vehicles are widely, such as load-haul-dump (LHD) and articulated dump truck. The most significant concerns of mine companies are safety and productivity. Fortunately, the autonomous driving system is one of the solutions. 

Figure 1. 35-tonne mining articulated dump truck... 

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