Abstract: A milling machine is provided comprising a frame including a plurality of height-adjustable legs; a rotor; a rotor chamber including a movable front wall, a movable rear wall, and a pair of movable side walls; and a controller. The controller is configured to enable a rotor chamber binding control during on a lowering of the rotor towards a ground surface; automatically raising at least one of the front wall or the rear wall during the lowering of the rotor; and disable the rotor chamber binding.

Abstract: A split air cabin ventilation system for construction of tunnel inclined shafts, including a first air cabin and a second air cabin which are both in a hollow closed structure with an air inlet end and an air outlet end respectively at both sides. The two air outlet ends are arranged away from each other. An end of the split air cabin is provided with an air inlet, and the other end is provided with an air outlet. The air inlet is connected to an air source, and the air outlet is connected to the air inlet ends of the first and second air cabins, respectively. The air inlet end of the first air cabin is connected to another air source.

Abstract: A flat chisel (1) having a longitudinal axis (7), a shank (2) and a blade-shaped working section (5). The shank (2) has a striking surface (4) perpendicular to the longitudinal axis (7). The working section (5) has a cutting edge (3) that is crosswise to the longitudinal axis (7). The cutting edge (3) is configured so as to be saddle-shaped.

Abstract: A tunnel boring machine having a cutting wheel equipped with a number of excavation tools provided with sensor units and, in a corresponding tunnelling method, only substantially fully worn excavation tools are able to be replaced using a data processing device designed with an advancement planning unit by detecting the current state of the excavation tools and predicting the state of the excavation tools on tool replacement predication planes lying in the advancing direction.

Abstract: A ground milling machine, comprising a milling drum, rotatably mounted in a milling-drum housing, for removing ground material, a milled-material conveying apparatus for transporting the removed ground material and a dust extraction apparatus for extracting dust-containing air from a region of the milled-material conveying apparatus, the dust extraction apparatus comprising at least one extraction line, which opens into the region of the milled-material conveying apparatus via an extraction opening, the ground milling machine comprising a left side wall, a right side wall, a front wall and a rear wall, and wherein a maintenance tunnel is provided which is designed such that it establishes an access connection, accessible from outside the ground milling machine, between the extraction opening and one of the side walls, the front wall or the rear wall of the ground milling machine. A method for maintenance of the dust extraction apparatus is also disclosed.

Abstract: A material transfer apparatus for transferring milled material for a ground milling machine, having a loading conveyor for discharging the milled material, a transfer conveyor for transporting the milled material onto the loading conveyor, and a transfer apparatus for transferring the milled material from the transfer conveyor into a receiving opening of a receiving apparatus of the loading conveyor, wherein the loading conveyor is swivel-mounted about a vertical swivel axis and about a horizontal swivel axis, and wherein the vertical swivel axis and the horizontal swivel axis intersect at an intersection point, wherein the horizontal swivel axis is arranged in vertical direction above the loading conveyor, in particular above the upper run of the loading conveyor. Moreover, a ground milling machine having such a material transfer apparatus.

Abstract: An earth working machine includes a support structure and a working assembly mounted on the support structure so as to be rotatable about a drive axis. An assembly-side bearing configuration is connected to the working assembly and a structure-side bearing configuration is connected to the support structure. The assembly-side bearing configuration includes a driver configuration having a driver surface facing in a first circumferential direction and the structure-side bearing configuration includes a driver counterpart configuration having a driver counterpart surface facing in a second circumferential direction opposite to the first, the movement spaces of the driver surface and of the driver counterpart surface about the drive axis overlapping one another.

Abstract: A self-propelled roadway maintenance machine has an operator's station located on a front portion of the machine's chassis and including a forward-facing operator's seat. A driven implement, such as a crack routing cutter drum for routing cracks in a roadway surface, is mounted on the front portion of the chassis in a location that can be monitored by a forward-facing operator while controlling machine steering and propulsion. The implement may be removably mounted on the chassis by a quick-connect coupling. If the implement comprises a crack routing cutter drum, a plurality of peripherally spaced cutter wheel assemblies may be mounted between disks of the cutter drum, each cutter wheel assembly including a pin and first and second bushings that support the pin on the disks and that are removably inserted into respective bores in the disks. Machine steering and propulsion and implement operation may all be effected hydraulically.

Abstract: The disclosure provides methods and systems for recovering a target mineral from a mineral-bearing deposit. One or more first wells and one or more second wells are drilled into the deposit, each well having a substantially vertical section and a substantially horizontal section, the horizontal section of the second wells located above the horizontal section of the first wells. At least one channel from the horizontal section of each first well toward the horizontal section of the second wells is established. A fluid is injected into the deposit from the horizontal section of the first wells to form one or more slots. A brine is recovered from the horizontal section of the second wells, forming a cavity. A salt solution is then injected into the cavity from the horizontal section of the second wells and a target mineral-enriched solvent is recovered from the first wells.

Abstract: A control method of a drill jumbo is provided. The drill jumbo includes a pre-splitting arm, a drill arm, and a chamber. The pre-splitting arm includes a positioning device, a fixing buckle, a longer rod, an electric telescopic rod, and a water injection opening. The chamber includes a constant pressure valve, an excitation circuit, and a port. A computer controls the positioning device to perform positioning, afterwards, the fixing buckle is opened, the telescopic rod is started, the longer rod is jacked into a position in the hole, and oil is injected into a hydraulic expansion capsule. After blocking of the hole is completed, water is injected into the water injection opening. The port is opened to inject a mixed-phase fluid. The port is closed, the excitation circuit is started, and after a pressure rises to a set value, the constant pressure valve is opened.

Abstract: A self-propelled ground milling machine, in particular a road milling machine, a stabilizer or a recycler, comprising a machine frame borne by traveling devices, a ground milling device mounted on the machine frame having a milling drum box and a milling drum which can be rotated within the milling drum box about a rotation axis running transverse to a main working direction of the ground milling machine, and an operator platform from which the ground milling machine is operated by an operator, having an operator platform floor on which the operator can stand while operating the ground milling machine, having a main floor plate. What is now essential according to the invention is that, in addition to the main floor plate, a side floor plate is provided which can be pivoted about a vertical axis or can be adjusted along a horizontal adjustment axis, and by means of which the standing area of the operator platform can be varied.

Abstract: The invention relates to a self-propelled construction machine, in particular a road milling machine, which possesses an undercarriage which has front and rear—in the working direction—wheels or travelling gears, a machine frame which is borne by the undercarriage, and a working means. Furthermore, the invention relates to a method for controlling a self-propelled construction machine, in particular a road milling machine. The invention is based on the detection of objects O situated in the ground at a time at which the objects O can be readily detected. The construction machine according to the invention possesses a means for generating predictive object signals which are characteristic of the position of objects which lie in a portion of the ground which lies in the working direction A in front of the working region of the working means.

Abstract: A cold planer can include a frame; an operator station coupled to the frame and including a monitor; a cutting rotor coupled to the frame, the cutting rotor configured to be lowered a selected distance into a surface to define a depth of cut; a conveyor to receive material from the cutting rotor; and a cutting rotor location indication system including: a camera coupled to the frame and oriented to show an area on a side of the frame; and a visual indicator system configured to receive a first image from the camera and display on the monitor a visual image of a location of a leading edge and a trailing edge of the cutting rotor relative to the surface.

Abstract: A milling machine may have a frame extending along a longitudinal axis and a milling drum attached to the frame. The milling machine may have ground engaging tracks that support the frame, and height-adjustable leg columns connecting the frame to the tracks. The milling machine may also have an engine for rotating the milling drum and propelling the ground engaging tracks. The milling machine may have a slope sensor to measure a roll angle of the frame, a speed sensor to measure a ground speed, and a configuration sensor to measure a machine configuration parameter. The milling machine may also have an alarm device and a controller. The controller may determine a threshold roll angle based on the machine configuration parameter, compare the roll angle with the threshold roll angle, and activate the alarm device when the roll angle is greater than or equal to the threshold roll angle.

Abstract: Some embodiments of the present disclosure provide a six-arm tunneling and anchoring machine for integrating tunneling and anchoring, which includes: a tunneling machine and a roof-bolter connected with each other. The roof-bolter includes roof bolt units, a side bolt unit, and a working platform unit. The tunneling machine includes a frame body, a walking part, a cutting part, a revolving body, a rear support body, a loading mechanism, a conveyor, an electronic control system, a hydraulic system, a spraying system and a cooling system. There are two sets roof bolt units, which are symmetrically arranged on the left and right sides of the frame body, and are located behind a revolving center of the revolving body. Each roof bolt unit is provided with two top anchor bolts.

Abstract: A working machine including front and rear wheels or a pair of endless tracks supporting a body. A first working arm with a first implement mount is connected to the body. An apparatus with a collector having a first opening and a sweeper trailing the collector is mounted to the first implement mount. A second implement mount connected to the body, and a milling device is mounted to the second implement mount. The sweeper is configured and arranged to move surface material broken up by the milling device into the collector via the first opening.

Abstract: Systems to bore or tunnel through various geologies in an autonomous or substantially autonomous manner can include one or more non-contact boring elements that direct energy at the bore face to remove material from the bore face through fracture, spallation, and removal of the material. The systems can automatically execute methods to control a set of boring parameters that affect the flux of energy directed at the bore face. Systems can further automatically execute the methods to trigger an optical sensor to capture images at the bore face, generate temperature profiles, identify spall fragments and hot zones and/or adjust a set of boring controls. For example, the system can execute methods to adjust a standoff distance between the system and the bore face, and adjust power and/or gas supply to the non-contact boring element.

Abstract: A system for removing debris from a drill hole, the system comprising a drill rod, a first lumen extending through the drill rod, and a second lumen extending parallel to the first lumen; a drill bit for mounting to the drill rod, the drill bit being configured to form the drill hole; at least one air channel extending between the proximal end of the drill bit and the distal end of the drill bit, the at least one air channel being configured to be fluidically connected to the first lumen of the drill rod; at least one vacuum channel extending between the proximal end of the drill bit and the distal end of the drill bit, the at least one vacuum channel being configured to be fluidically connected to the second lumen of the drill rod; and a container fluidically connected to the second lumen of the drill rod.

Abstract: A mining or construction vehicle comprising a boom extending in a first direction, which boom, via a first and a second rotation device, is connected to a hydraulic device arranged on a mounting device arranged at a free end of said boom, the first rotation device being arranged to provide a rotation around a first axis that is substantially parallel to the first direction, and a second rotation device being arranged to provide a rotation around a second axis that is arranged at an angle with respect to the first axis. Hydraulic conduits for supply of hydraulic fluid to said hydraulic device on said mounting device are arranged through at least one of the first and second rotation devices.

Abstract: A mobile milling machine includes a cutting rotor disposed along a rotor drum delineating a drum rotation axis and accommodated in a rotor chamber delineated by chamber enclosure. To rotatably support the rotor drum with respect to the chamber enclosure, the rotor drum can include a bearing end and the chamber enclosure can include a bearing bore that are adapted to form a drum bearing assembly. The drum bearing assembly may include a bearing hub and a bushing configured to make a sliding frictional contact along complementary taper surfaces. The floating bushing may be floatingly retained in a chamber door of the chamber enclosure.