The invention is directed to a method of strip mining that involves dividing the pit into blocks in a diamond shape arrangement with an angular advancing strike face and removing waste material from each diagonally adjacent block so as to minimize the amount of waste material pushed by dozers and maintain the incline of ramps to gradients of 10% or less so that trucks can take mined ore from the pit.

The invention is directed to a method of strip mining that involves dividing the pit into blocks in a diamond shape arrangement with an angular advancing strike face and removing waste material from each diagonally adjacent block so as to minimize the amount of waste material pushed by dozers and maintain the incline of ramps to gradients of 10% or less so that trucks can take mined ore from the pit.

The invention discloses a brakeable transportation ore cart for mine mineral transportation, which comprises a base. Hydraulic rods are symmetrically fixed to the left and right ends of the base. The hydraulic rod is provided with a support beam for installing a motor. The motor is mounted on the beam. A moving first gear is mounted on the beam, and a hopper is rotatably installed through a rotating shaft. A second gear meshing with the first gear is fixedly mounted on the rotating shaft. A telescopic plate supported by a first spring is provided at the bottom of the hopper. Drive the hydraulic rod to make the entire hopper rise, and the third guide rod in contact with the lower end of the hopper moves upward along the sliding groove under the action of the left-right symmetrical fourth spring, thereby driving the fourth guide rod to move upward and the fourth guide rod. The fifth gear connected at the end is moved upward. Under the action of the third rack and the fifth gear meshing with each other, the fifth gear moves counterclockwise to drive the fourth gear meshed with the fifth gear to move downward.

A jack for a vehicle includes a tube configured to be coupled to a chassis, and a cylinder assembly supported by the tube. The cylinder assembly includes a barrel and a rod at least partially received within the barrel. Actuation of the cylinder assembly causes the barrel to move relative to the tube in a first direction parallel to a longitudinal axis of the tube while the rod remains stationary relative to the tube. In some aspects, the jack further includes a locking device selectively received within the tube in a locked position. The locking device intersects the barrel's path to inhibit movement of the barrel in a second direction opposite the first direction when the locking device is in the locked position.

A transport unit, a material transfer structure and a material transfer unit for a mobile haulage arrangement are arranged for continuously conveying fragmented material in a conveying direction. A mobile haulage arrangement and a method for continuously conveying fragmented material in a conveying direction is also disclosed. The transport unit includes two ground transportation structures and a support frame suitable for fitting a belt of an enclosed belt conveyor thereunder. The ground transportation structures has at least one height adjustment device, wherein the support frame comprises at least one connector, which is arranged for connecting a support structure thereto. The height adjustment devices are arranged to vary the position of at least a portion of the support frame in relation to the ground transportation structures.

A transport unit, a material transfer structure and a material transfer unit for a mobile haulage arrangement are arranged for continuously conveying fragmented material in a conveying direction. A mobile haulage arrangement and a method for continuously conveying fragmented material in a conveying direction is also disclosed. The transport unit includes two ground transportation structures and a support frame suitable for fitting a belt of an enclosed belt conveyor thereunder. The ground transportation structures has at least one height adjustment device, wherein the support frame comprises at least one connector, which is arranged for connecting a support structure thereto. The height adjustment devices are arranged to vary the position of at least a portion of the support frame in relation to the ground transportation structures.

A brake system, method for controlling the brake system and a mine vehicle having the same are provided. The brake system of the mine vehicle includes spring activated and hydraulically released brake assemblies in connection with wheels of the vehicle. The brake assemblies have hydraulic release actuators, which are pressurized for releasing the brakes. During normal operation, the release actuators are pressurized by a main brake circuit and are controlled by a brake controller. A separate release circuit and pressure source may be activated for releasing the brakes when the vehicle is disabled. The system further includes an override device for selectively depressurizing the release actuators during towing.

A conveyor system includes a plurality of crawler members, a frame supported via the crawler members, a skid pad moveable relative to the frame to raise and lower the frame relative to a ground surface, and an intake structure supported by the frame. The intake structure includes a first conveyor. The conveyor system further includes a discharge boom supported by the frame. The discharge boom includes a second conveyor.

A conveyor system includes a plurality of crawler members, a frame supported via the crawler members, a skid pad moveable relative to the frame to raise and lower the frame relative to a ground surface, and an intake structure supported by the frame. The intake structure includes a first conveyor. The conveyor system further includes a discharge boom supported by the frame. The discharge boom includes a second conveyor.

The present disclosure relates to a method for constructing a penstock. A path of the penstock to be dug along a central axis of a hydro-electric site within a rock mass is planned. A lower shaft is excavated, the lower shaft intersecting the path of the penstock. A starting station extending from the lower shaft and from a bottom of the path of the penstock is excavated. The penstock is excavated. An arrival station is excavated and is overhanging above a top of the penstock. An expansion chamber broadening a width of the penstock and broadening a width of the lower shaft near the bottom of the path of the penstock is excavated. A hydro-electric site comprising the penstock is also disclosed.