Abstract: The present invention discloses a multi-energy complementary system for a co-associated abandoned mine and a use method. The multi-energy complementary system for a co-associated abandoned mine includes a mining mechanism, a grouting mechanism and an energy mechanism. In the present invention, the mining of coal and uranium resources is realized through the mining mechanism, the subsidence and seepage reduction of the stratum is realized through the grouting mechanism, and the effective utilization of waste resources is realized through the energy mechanism. Finally, with the efficient cooperation of the three mechanisms, safe and efficient development and utilization of co-associated resources in the full life cycle are realized, and the purposes of green and efficient mining of coal and uranium resources and secondary development of a coal seam goaf are achieved, thereby facilitating the realization of dual-carbon goals and the development of low-carbon green energy.

Abstract: A system for remotely operating a machine, such as a mine vehicle, includes at least one first emitter for emitting a first signal corresponding to a first zone adjacent to the machine. A transmitter is provided for receiving the first signal emitted by the emitter, the transmitter being adapted for issuing commands for controlling the machine and also indicating the presence of the transmitter in the first zone. A controller is also provided for controlling the machine based on the control signals from the transmitter based on the presence of the transmitter in the first zone. Related methods are also disclosed.

Abstract: A tool for removing material includes a body, an ultrahard insert, and a matrix. The body has a forward portion, an opposing rear portion, and a longitudinal axis therebetween. The ultrahard insert includes an ultrahard material, and the ultrahard insert is mounted to and contacts the body proximate the forward portion. The matrix contacts the body and the ultrahard insert. The matrix is mechanically interlocked with the body and at least a portion of the matrix is positioned circumferentially around at least a portion of the forward portion of the body.

Abstract: A cutter drum for profiling a surface includes a cylindrical body extending along an axis from a first end to a second end. The cylindrical body includes a circumferential outer surface encircling the axis. A plurality of cutter mounts are attached to the circumferential outer surface of the cylindrical body. A rotary cutter is rotatably coupled to each cutter mount of the plurality of cutter mounts. A plurality of carbide picks are secured to the circumferential outer surface of the cylindrical body. Each of the carbide picks has a fixed position relative to the circumferential outer surface of the cylindrical body.

Abstract: A scraper for use with a moldboard of a milling machine is manufactured from a rigid material including at least one of the following: a hardened steel having a hardness of at least 50 Rockwell Scale C, a carbide, and PCD diamonds.

Abstract: This disclosure relates to a system for removing road material. In an embodiment, the system may include a milling drum and at least one pick mounted on the milling drum. Furthermore, the pick may include polycrystalline diamond at least partially forming one or more working surfaces of the pick.

Abstract: Systems and methods can sense, using a vibration sensor disposed relative to a rotor of a milling machine, vibration associated with a cutting operation of the rotor of the milling machine; and determine during the cutting operation whether the sensed vibration associated with the cutting operation of the rotor indicates now that the rotor is cutting a second material different from a first material being previously cut by the rotor during the cutting operation. The second material can be harder than the first material. Cutting operations of the milling machine can be controlled based on identification of the rotor cutting the second material. The cutting operations can include speed of the milling machine, cutting level and/or depth of the rotor, and/or rotational speed of the rotor.

Abstract: A bit holder that includes a front body portion and a shank axially depending from the bottom of the front body portion. The shank of the bit holder includes at least one slot and at least one annular ring disposed partially or nearly circumferentially around the shank. The slotted shank of the bit holder and the at least one annular ring are radially compressible to achieve and maintain an interference fit when inserted into a bore of a base block.

Abstract: A machine for roadwork can include a frame, a power source, and a milling rotor operatively connected to the power source and the frame. The machine can also include means for detecting obstacles around an exterior of the machine; and means for activating an obstacle-detection response. The obstacle-detection response can adjust at least one milling parameter, change at least one sensor that the machine uses to control at least one mil ling parameter, or override at least one system on the machine to prevent the machine from automatically adjusting any milling parameters.

Abstract: A milling machine includes a cutting rotor, a foldable conveyor, a sensor, and a controller. The cutting rotor is configured to mill material beneath the milling machine. The foldable conveyor is configured to receive and dispose the milled material and includes a first section and a second section foldable with respect to the first section at a fold structure. The sensor is positioned on the milling machine and configured to sense a value indicative of a force acting on the second section. The controller is configured to determine an amount of the milled material within the second section of the foldable conveyor using the value indicative of the force.

Abstract: A milling machine includes a rotor drive transmission having a plurality of gears disposed between a prime mover and a cutting rotor. The rotor drive transmission is associated with a rotor transmission hydraulic circuit including a hydraulic gearshift actuator to engage the plurality of gears in one or more gear ratios and a gearshift directional control valve to direct hydraulic fluid to and from the hydraulic gearshift actuator. In occurrence of a fault condition, the rotor transmission hydraulic circuit includes a gearshift trapping valve to maintain hydraulic pressure in the hydraulic gear actuator and the engaged gear ratio of the rotor drive transmission.

Abstract: A propulsion control device of a 3D printing-based tunnel boring machine, includes two propulsion control modules, and each of which includes tunnel support assemblies, a propulsion control assembly and a barrel body, where a propulsion sliding sleeve is arranged on an outer surface, and several tunnel support assemblies are arranged on an outer side of each propulsion sliding sleeve. Support plates on the two propulsion control modules alternately rise to support a 3D printed tunnel pipe. In the propulsion control module with the support plates in a closed state, a propulsion hydraulic cylinder controls a propulsion hydraulic cylinder extending end to contract, so as to pull the propulsion sliding sleeve to a front section of the barrel body; and in the propulsion control module with the support plates in a support state, the barrel body continuously advances relative to the propulsion sliding sleeve.

Abstract: The invention relates to a self-propelled construction machine, comprising a machine frame supported by a chassis having wheels or crawler tracks. The basic principle of the invention involves determining a variable ? which is characteristic of the milling profile on the basis of a functional relationship between the variable which is characteristic of the milling profile and the advance speed v and/or milling drum rotational speed n. The variable ? which is characteristic of the milling profile is a correction variable for adjusting the height of the milling drum with respect to the surface of the ground.

Abstract: A cold planer can include a frame; a milling assembly including a drum housing and a cutting rotor located within the drum housing, the drum housing including a discharge port; a primary conveyor coupled to the frame, wherein the primary conveyor is positioned near the discharge port so as to receive material through the discharge port; a secondary conveyor positioned to receive material off an end of the primary conveyor; a sensor associated with the secondary conveyor to sense a load on the secondary conveyor; and a controller configured to receive information from the sensor regarding the load and to control a speed of the secondary conveyor based on the information.

Abstract: An adjustable pitch rotor for a milling machine includes an inner drum and an outer shell formed by first and second outer shell portions. Drum cutting assemblies with cutting bits extend outward from outer surfaces of the outer shell portions, with each of the cutting bits being longitudinally spaced from longitudinally adjacent cutting bits on their respective outer shell portions by a pitch distance. In a first pitch configuration, each cutting bit may be longitudinally aligned with a corresponding cutting bit on the other outer shell portion so that grooves milled in a work surface by the rotor are spaced by the pitch distance. In a second pitch configuration, each of the cutting bits may be longitudinally spaced from longitudinally adjacent cutting bits of the other outer shell portion by one-half the pitch distance to mill grooves in the work surface that are spaced by one-half the pitch distance.

Abstract: The present invention relates to a method for controlling a distance of a height-adjustable side shield of a milling drum box of a ground milling machine, in particular a road milling machine, a recycler or a stabilizer, in vertical direction with respect to the ground, comprising the steps of: ascertaining a reference value for the height setting of the side shield from operating parameters of the ground milling machine, determining a desired distance (d) between the side shield and the ground, the desired distance (d) ensuring the safety of persons located next to the ground milling machine, ascertaining a necessary height setting of the side shield from the reference value and the desired distance (d), and setting the position of the side shield with respect to the ground in observance of the desired distance (d), so that the side shield is guided, in vertical downward direction, without contact to the ground.

Abstract: A ground milling machine, comprising a machine frame, an operator platform, a drive engine, travelling apparatuses, a milling unit, a conveying apparatus for transporting milled material from the milling unit to a discharge point with a transfer conveyor and a downstream loading conveyor, and with a material transfer apparatus arranged in a material transfer region between transfer conveyor and loading conveyor, which material transfer apparatus is configured so as to direct milled material from the transfer conveyor to the loading conveyor, the transfer conveyor and the loading conveyor each comprising a support frame, wherein the material transfer apparatus comprises a milled-material-directing transfer chute, wherein the transfer chute has a chute guide surface extending at least partially in a horizontal direction and running in an at least partially descending manner from the transfer conveyor to the loading conveyor, and wherein the transfer chute is arranged at least partially immovably with respect to

Abstract: A machine service set position control system is used on a machine that includes a frame, traction devices connected to the frame, a power source connected to the traction devices and configured to rotate the traction devices, a drum chamber connected to the frame, a milling drum rotatably supported within the drum chamber and configured to engage with a ground surface, and a rotor drive train connected to the milling drum and configured to rotate the milling drum to mill the ground surface, the rotor drive train including a gearbox. The service set position control system is programmed to determine a position of at least the rotor drive train and selectively operate a rotor drive train actuator connected to the rotor drive train based on the determined position to move the machine into a machine service set position allowing easy access for a technician to perform service.

Abstract: A self-propelled milling machine has a machine frame 4 supported by running gears 6A, 6B, a working device 5 provided on the machine frame 4 for working the ground, and a conveyor device 12 for removing material. The conveyor device 12 has a boom 13 which is mounted on the machine frame 4 so as to pivot about an axis of rotation X which is perpendicular to the machine frame. The pivoting apparatus 16 for the boom 13 is characterised by at least one mechanism 16A, 16B having a plurality of mechanism links and the joints A, B, C, D connecting them and at least one linear drive 17A, 17B for driving at least one of the mechanism links. The mechanism may be designed as a planar four-link pivot joint mechanism 16A, 16B, the machine frame 4 forming a mechanism link of the pivot joint mechanism.

Abstract: When removing portions of a work surface at a worksite with a machine (e.g., such as a cold planer), is useful to know the actual cut depths on each edge of the cold planer and/or the volume of material that has been removed from a work surface. However, determining actual cut depths and/or volume removed is difficult, costly, and can be inaccurate, resulting in increased costs and inefficiencies at the worksite. Accordingly, the present disclosure describes systems and methods for enabling automatic control of cut depth of a machine via a machine-controlled feedback loop and improved determinations of actual volume of material removed by the machine.