A method of dewatering a tailings lagoon retained by a dam comprising: excavating an excavation hole in the tailings lagoon; allowing water from surrounding tailings to enter the excavation hole; and pumping water in the excavation hole out of the excavation hole and discharging beyond a toe of the dam. Also disclosed is a method comprising: excavating a channel in a tailings lagoon from a shore of the tailings lagoon and floating a pontoon in water in the channel from the shore along the channel,wherein: excavating involves breaking down solid tailings in the tailings lagoon into a slurry using water and removing the slurry using a submersible slurry pump mounted on the pontoon.

The invention relates to a vehicle comprising a tiltable material collecting container which is suspended in a tilt axle running parallel to the longitudinal axis of the vehicle and a telescoping device. The tilt axle runs in a plane of symmetry of the material collecting container. The frame-side ends of the telescope arms are pivotably attached to the frame in the central plane. At least one rotary drive is arranged on the container-side end of at least one telescope arm (09) to enable a rotation of the material collecting container about the tile axle. At least one pivot drive, which enables pivoting of the telescope arms out of the center plane of the vehicle in both angular directions, is provided.

The invention relates to a vehicle comprising a tiltable material collecting container which is suspended in a tilt axle running parallel to the longitudinal axis of the vehicle and a telescoping device. The tilt axle runs in a plane of symmetry of the material collecting container. The frame-side ends of the telescope arms are pivotably attached to the frame in the central plane. At least one rotary drive is arranged on the container-side end of at least one telescope arm (09) to enable a rotation of the material collecting container about the tile axle. At least one pivot drive, which enables pivoting of the telescope arms out of the center plane of the vehicle in both angular directions, is provided.

A remote debris tank includes a housing having a top and a bottom discharge opening, a pair of discharge doors mounted to opposing lateral sides of the bottom discharge opening and configured for pivotal movement between an open position and a closed position, and an actuating shaft operably coupled to the first and second discharge doors. The remote debris tank also includes a crank lever having a plurality of vertices, where the crank lever is secured to the actuating shaft at a first vertex and configured to rotate with the actuating shaft. A first radial arm has a first end articulately connected to a second vertex of the crank lever and a second end articulately connected to the first discharge door. Similarly, a second radial arm is articulately connected to a third vertex of the crank lever and extending away from the actuating shaft to the second discharge door.

A remote debris tank includes a housing having a top and a bottom discharge opening, a pair of discharge doors mounted to opposing lateral sides of the bottom discharge opening and configured for pivotal movement between an open position and a closed position, and an actuating shaft operably coupled to the first and second discharge doors. The remote debris tank also includes a crank lever having a plurality of vertices, where the crank lever is secured to the actuating shaft at a first vertex and configured to rotate with the actuating shaft. A first radial arm has a first end articulately connected to a second vertex of the crank lever and a second end articulately connected to the first discharge door. Similarly, a second radial arm is articulately connected to a third vertex of the crank lever and extending away from the actuating shaft to the second discharge door.

The application relates to a modular slurry wall cutter for preparing a slurry trench that is connectable to a carrier machine, said slurry wall cutter having a frame and at least one cutting tool arranged at the frame to break up soil material. The frame here comprises an upper frame part, a middle frame part, and a lower frame part that are releasably connectable to one another, with the upper and lower frame parts being releasably connectable to one another both directly and via the middle frame part that can be arranged therebetween. The application further relates to a carrier machine, such as to a cable excavator, having a slurry wall cutter in accordance with the application.

A method for controlling the movement of an articulated hose mount having at least n>2 members, wherein a change in angle can be induced between neighboring members with the help of a respective drive includes:

a) determining the starting position of the n members with the help of sensors;
b) input of a direction vector and a velocity parameter;
c) determining a target position, which should be taken by a suction crown, on the free end of the last member;
d) determining n angle changes which must be carried out on the n members in order to reach the target position while maintaining the following condition: d.i. the suction crown moves into the target position along a straight path of movement;
e) controlling the drives associated with the n members in order to perform the predetermined angle change on the n members; and
f) cyclically repeating the aforementioned method steps until the direction vector and/or the velocity parameter are zero.

The present application discloses a dredging system for a pre-paved gravel foundation bed surface in open sea deep water, including a dredging mechanism, which includes a dredging suction head, a power component and a dredging pipeline, wherein the dredging suction head is connected with the dredging pipeline; the dredging pipeline is communicated with the power component; the dredging suction head includes at least one ridge surface suction port and at least one furrow suction port; the openings of all the furrow suction ports are lower than those of all the ridge surface suction ports; a lifting mechanism, which is connected with the dredging suction head and is used for lifting the dredging suction head to the gravel foundation bed surface; a moving mechanism, which is connected with the lifting mechanism and is used for driving the dredging suction head to move within a dredging range of the gravel foundation bed surface. By the adoption of the dredging system for the pre-paved gravel foundation bed surface in the open sea deep water of the present application, the dredging suction head includes the ridge surface suction ports and the furrow suction ports, and may suck mud on the top surfaces of gravel ridges and the mud in furrows between two gravel ridges at the same time, thereby guaranteeing the dredging quality of the gravel foundation bed surface and improving the working efficiency. The dredging system is simple in structure, convenient to use and good in dredging effect.

The present invention is directed to a drilling fluid reclaimer The reclaimer has at least one adjustable screen assembly for providing a leveling filter for reclaimed drill fluid. Used drill fluid is placed at the screen assembly at the front the of the screen assembly. The at least one screen is vibrated to separate large particulate matter from liquid drilling fluid. A second screen is provided for additional filtering. Large particulate matter is expelled by a chute at the back of the screen assembly. Drilling fluid passing through the screen is reclaimed for use with a drilling system.

The invention relates to a cutter head for removing a mixture comprising water and solid materials from a water bottom, comprising rotating blades each provided with cutting means on a leading edge thereof, said cutter head being rotatably coupled to a tube for transporting said mixture, the shape of the leading edge of said rotating blades being defined by substantially fitting a rounded cone with a rotation axis, wherein each rotating blade at a middle part is coupled to a connecting ring and at a top part is linked to a top part of another rotating blade. The cutter head is characterized in that the rotation axis of said blades is substantially aligned with a rotation axis of said ring; in that a trailing edge of part at least one of said blades is positioned closer to said rotation axis than a leading edge of said blades so as to provide a suction function towards said tube upon rotation of said cutter head; and in that said blades as viewed from said top part at a bottom part of said blades extend to a position beyond said connecting ring. A preferred embodiment comprises a method for using the cutter head according to the invention.