Abstract: A cutting bit includes a rear adapter portion having a body of revolution, an outer circumferential surface, and a first retention nub extending from the outer circumferential surface. The cutting bit also includes a forward portion, and an intermediate collar portion that is disposed between the rear adapter portion, and the forward portion.

Abstract: A method of adjusting milling properties of a rotor for a milling machine includes accessing the rotor. The rotor includes a drum and a plurality of cutting assemblies, and each cutting assembly includes a tool block, a tool holder, and a cutting bit. The method also includes adjusting a rotational orientation of a plurality of cutting bits and tool holders relative to the corresponding tool blocks, and enclosing the rotor.

Abstract: The present invention discloses an in-situ leaching method and system. The ISL mining method provided by the present invention includes: constructing a vertical guiding well into an ore body; constructing a horizontal well towards the vertical guiding well, where the horizontal well includes a vertical section and a horizontal section; one end of the horizontal section is connected to the vertical section, and the other end of the horizontal section is connected to the vertical guiding well; constructing a plurality of vertical extraction wells towards the horizontal section; and simultaneously injecting lixiviant into the vertical section and the vertical guiding well by means of pressurized injection, and extracting leachate through the vertical extraction well. The ISL mining method and system provided by the present invention accomplish the injection through a horizontal well.

Abstract: The invention relates to a method for mining and processing of an ore. The method comprises at least one mobile comminution device (26) comprising at least one mobile crusher unit and at least one mobile grinding unit located proximate to an ore body that is being mined (20), fragmented ore (22) from the ore body is comminuted in the mobile comminution device (26) to a size which can be readily pumped (28) without the use of special carrier fluids, preferably to a particle size p50 in the range between 0.05 to 1 mm and the comminuted ore is combined with water to form a slurry.

Abstract: A chisel arrangement is arranged to be connected to a pivotal tool mount on a work machine. A pivot axis of the tool mount forms an operative pivot axis of the chisel arrangement. The chisel arrangement includes a housing provided with a coupling portion which is arranged to be attachable to the tool mount. A reciprocatable chisel projects from an end portion of the housing. A clearing blade is rigidly attached to the housing remotely from the end portion and projects from the periphery of the housing and is provided with a forward edge which is substantially parallel to the operative pivot axis of the chisel arrangement.

Abstract: A cable handling system for a longwall mining machine is disclosed. The longwall mining machine includes a shearer configured to move along a pan line to mine material along a mine face. The cable handling system includes a service line configured to carry one or more supply lines to the shearer for facilitating shearer operation. Further, a plurality of interconnected trays accommodates the service line. Moreover, a controller is configured to determine a profile of the pan line; detect one or more parameters associated with the service line in relation to the profile of the pan line; and determine a likelihood of at least a portion of the service line dislodging from the plurality of interconnected trays based on the one or more parameters exceeding a predefined threshold.

Abstract: A ground milling machine, in particular a soil stabilizer or a recycler, comprising a machine frame carried by front and rear traveling devices, a drive engine arranged on the machine frame, a ground milling device with a milling rotor supported for rotation about a horizontal rotation axis extending transversely to the working direction of the ground milling machine, said milling rotor having a plurality of ground processing tools, and with a milling rotor housing having an interior space which is open in the downward direction towards the underlying ground and in which the milling rotor is arranged, said milling rotor being height-adjustable via a milling depth adjusting device having a drive, and said milling rotor housing being connected to the machine frame via a housing support device. The invention further relates to a method for operating a ground milling machine.

Abstract: A mine exploitation method based on stoping, separation and filling control is disclosed herein. The method includes deploying a gangue-less coal mining system; choosing a suitable coal and gangue separation method according to a separation requirement; choosing a suitable filling method according to mine geology, production conditions and rock stratum control requirement; reversely calculating a filling rate according to gangue discharge requirement and control indexes by utilizing theoretical calculation, simulation and experiment; determining a filling process and a separation process according to the filling rate; and feeding back and adjusting the filling process and separation process parameters by monitoring filling and control effect indexes.

Abstract: A milling machine may include a frame. The milling machine may include a first wheel and a second wheel connected to a first end of the frame, and a third wheel connected to a second end of the frame. The milling machine may include a first leg, a second leg, and a third leg connecting the frame and the first wheel, the second wheel, and the third wheel, respectively. The milling machine may include a pair of arms pivotably connected to opposite sides of the frame. The milling machine may have a milling drum rotatably connected to the arms with a rotational axis parallel to the pivot axis. Further, the milling machine may have an engine that rotates the milling drum via a transmission. An output shaft of the engine positioned transverse to the frame may have an output shaft axis spaced apart from the pivot axis of the arms.

Abstract: A drill bit for drilling into masonry or rock includes a drilling head at its forward end, a clamping shank at its rearward end, and a helical conveying portion extending between the drilling head and the shank. The helical conveying portion includes at least two helically extending flutes separated by at least two helically extending webs. The helical conveying portion has a changeover portion, a pre-changeover portion between the drilling head and the changeover portion, and a post-changeover portion between the changeover portion and the shank. In the pre-changeover portion, the flutes have a pre-changeover pitch, the first web has a first pre-changeover web width ?, and the second web has a second pre-changeover web width ??. In the post-changeover portion, the flutes have a post-changeover pitch, the first web has a first post-changeover web width ?, and the second web has a second post-changeover web width ??.

Abstract: A tunnel boring device for laying a pipeline in the ground using a boring tool, having; a feed line for supplying a boring fluid to the boring tool; a section, arranged at the rear of the boring tool, for receiving the ground cuttings, wherein the region of the boring tool and the section are filled with boring fluid, with a pressure that corresponds to the pressure in the ground; at least a jet pump for removing the boring fluid mixed with the cuttings; at least one conveying line for removing the boring fluid mixed with cuttings, this line being connected to the delivery side of the pump connected to the section via a suction line. The jet pump is connected to a drive line via which a driving fluid is supplied to the jet pump; the pump is arranged outside then section; and the suction line contains a shutoff valve.

Abstract: A machine for road work for road work, the machine can comprise: a frame, a drive system including a power source carried by the frame, a milling system driven by the power source and a controller. The milling system can comprise: a rotor configured to rotate and remove an amount of material from a working area; a drive member coupling the rotor to be driven by the power source; a tensioner assembly configured to tension the drive member; and a sensor configured to measure the tension of the drive member. The controller can be configured to, in response to a signal received from the sensor, determine if the rotor has encountered an object capable of damaging the rotor.

Abstract: The self-propelled construction machine according to the invention, in particular a road milling machine, stabiliser, recycler or surface miner, has a machine frame 1, a work roller arranged on the machine frame, and a left-hand edge protector 5A arranged on the left-hand side of the work roller in the working direction and a right-hand edge protector 5B arranged on the right-hand side of the work roller in the working direction. In order to raise and/or lower the left-hand and/or right-hand edge protector 5A, 5B, a hydraulic system is provided which comprises a hydraulic source 20 for providing hydraulic fluid.

Abstract: For use with a top drive power unit supported for connection with a well string in a well bore to selectively impart longitudinal and/or rotational movement to the well string, a feeder for supplying a pumpable substance such as cement and the like from an external supply source to the interior of the well string in the well bore without first discharging it through the top drive power unit including a mandrel extending through a sleeve which is sealably and rotatably supported thereon for relative rotation between the sleeve and mandrel. The mandrel and sleeve have flow passages for communicating the pumpable substance from an external source to discharge through the sleeve and mandrel and into the interior of the well string below the top drive power unit. The unit can include a packing injection system and novel seal configuration.

Abstract: A cutter bit for a work tool on a machine includes a leading end, conical-shaped tip portion, a rearward, frustoconical-shaped tip portion extending axially rearwardly from the leading end, conical-shaped tip portion, an annular ledge extending radially outwardly from a trailing edge of the rearward, frustoconical-shaped tip portion, a frustoconical-shaped body portion extending axially rearwardly from an outer circumferential edge of the annular ledge, a cylindrical collar portion extending axially rearwardly from a trailing edge of the frustoconical-shaped body portion, and a trailing end, cylindrical-shaped shank portion extending axially rearwardly from the cylindrical collar portion. The cutter bit may also include a plurality of circumferentially-spaced ribs projecting radially outwardly from an outer peripheral surface of at least one of the leading end, conical-shaped tip portion, the rearward, frustoconical-shaped tip portion, or the frustoconical-shaped body portion.

Abstract: A tunnel boring robot includes a tunnel boring machine, a sensing unit, an intelligent decision unit, and a controller unit. The sensing unit, the intelligent decision unit and the controller unit are disposed at the tunnel boring machine. The sensing unit is configured to sense, in real time, boring operation data of a current cycle during which the tunnel boring machine is working according to set boring parameter information. The intelligent decision unit is configured to receive the boring operation data sent by the sensing unit, and generate the set boring parameter information for a next cycle according to a preset prediction algorithm, the boring operation data and a desired boring effect. The controller unit is configured to receive the set boring parameter information, and control the tunnel boring machine to perform a boring operation for the next cycle according to the set boring parameter information.

Abstract: A floor stripping machine blade of a blade assembly has a leading edge, when the blade assembly is attached to a floor stripping machine, at an angle that is other than perpendicular to the direction of travel of the floor stripping machine, said angle of the blade's leading edge being fixed or adjustable.

Abstract: Embodiments of the invention are directed to cutting tool assemblies, material-removing machines that include cutting tool assemblies, and methods of use and operation thereof. In some embodiments, the cutting tool assemblies described herein may be used in material-removing machines that may remove target material. For example, the cutting tool assemblies may include one or more superhard working surfaces and/or one or more shields.

Abstract: A milling assembly includes a drum housing including a discharge port; a cutting rotor located within the drum housing; and a flow director positioned within the drum housing proximate the discharge port and configured to direct a flow of material removed by the cutting rotor towards a first stage conveyor positioned near the discharge port.

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.