Abstract: A method for milling off traffic areas with a milling drum of a milling machine includes: obtaining and storing target profile data of a desired target profile of a surface of the traffic area in target condition, wherein target values for a locally desired milling depth are assigned to position data in a stationary coordinate system independent of the milling machine; determining the current position of the milling drum in the coordinate system and detecting a current milling depth; during the milling operation, controlling the milling depth as a function of the target value assigned to the current position of the milling drum and the currently detected milling depth; updating the target profile data in the current position of the milling drum on the worked traffic area by the currently actually milled milling depth; and storing the updated target profile data.

Abstract: In one aspect, a method for monitoring a milling machine having a milling rotor and a rotor chamber surrounding the milling rotor includes propelling the milling machine in a direction of travel, positioning a door of the rotor chamber at a first position with an actuator, and receiving a signal indicative of a condition of the actuator for positioning the door of the rotor chamber. The method further includes determining that the door has encountered material based on the signal and opening the door of the chamber in response to determining that the door has encountered material.

Abstract: The present invention relates to a system for recovering a continuous miner arrangement from a tunnel. The system includes a coupler for coupling the continuous miner arrangement to a pulling apparatus. The pulling apparatus pulls the continuous miner arrangement from the tunnel. Advantageously, the pulling apparatus may pull the continuous miner arrangement from the tunnel, either fully or partially until the continuous miner arrangement may once again retract from the tunnel under its own power.

Abstract: The present invention relates to systems and methods of mining, including drilling a first plurality of blast holes along a length of a horizontal stope and blasting explosive within the first plurality of blast holes. The method includes recovering fragmented ore from the horizontal stope and stabilizing the horizontal stope via a first engineered roof. The method then includes drilling a second plurality of blast holes along the length of the horizontal stope and blasting explosive within the second plurality of blast holes. The method further includes recovering fragmented ore from the horizontal stope and stabilizing the horizontal stope via a second engineered roof. The horizontal stope is mined in a downward direction.

Abstract: A dam according to the present disclosure includes a main dam including a first reservoir, and at least one first discharge part configured to discharge water stored in the first reservoir, an auxiliary dam spaced apart from the main dam at a predetermined interval and including a second reservoir configured to store the water discharged from the main dam, and at least one second discharge part configured to discharge the water stored in the second reservoir, and an underground water path being provided separately at a lower side of a bottom surface of the river or stream under a lower side of the second reservoir, and including a third discharge part.

Abstract: A microwave-mechanical fluidization mining system and a mining method for metal mines. The microwave-mechanical fluidization mining system comprises a microwave pre-splitting mechanical mining system, a microwave separation system, a high-power microwave focused melting system and a goaf, wherein ore-waste rock mixtures mined by the microwave pre-splitting mechanical mining system are transported to the microwave separation system through a conveyor and an elevator on the microwave pre-splitting mechanical mining system, separated ores are transported to the high-power microwave focused melting system, and separated waste rocks are transported through a conveyor to the goaf for filling. Microwave pre-splitting mechanical mining is adopted instead of a traditional blasting mining method to increase an excavation speed and avoid the influence of blasting on the stability of surrounding rocks.

Abstract: A self-propelled construction machine, having a milling drum housing having a sealing device which has a sealing element arranged in the working direction of the construction machine behind the milling drum, an adjustment device for adjusting the height position of the sealing element, and a controller for controlling the adjustment device of the sealing element. The sealing device has a scraper element, which is pivotably arranged on the sealing element such that the scraper element rests on the milled material and is pivoted in relation to the milling drum on the basis of the height of the milled material. The height position of the sealing element is adjusted on the basis of the pivot position of the scraper element.

Abstract: In a self-propelled construction machine (1), in particular road milling machine, stabilizer, recycler or surface miner, comprising a machine frame (2), and at least one working device (6), in particular milling drum, which is arranged in a housing (4) open towards the bottom that is at least partially closed on at least one side by at least one edge protector (8) height-adjustable relative to the machine frame (2), wherein, for the purpose of height adjustment, at least one first lifting device (10) is provided, the first end (15) of which is connected to the machine frame (2), and the second end (16) of which is connected to the height-adjustable edge protector (8), it is provided for the following features to be achieved: a second lifting device (12) is provided, the first end (18) of which is connected to the machine frame (2), and the second end (20) of which is connected to a first end (22) of a transmission device (14), which is in turn connected, with a second end (24), to the height-adjustable edge p

Abstract: A self-propelled construction machine for milling a ground surface is provided with a machine frame, a working drum, and a transport conveyor with a discharge end from which worked-off milling material is dischargeable onto a point of impingement on a loading surface of a transport vehicle, wherein the transport conveyor is laterally slewable to a slewing angle about at least a first slewing axis. A controller is configured, during an initialization process, to specify a command variable within a coordinate system, the coordinate system being stored during the initialization process with its origin at a starting point associated with the machine. The controller is further configured during a working process, wherein the coordinate system is stationary, to automatically control the slewing angle corresponding to detected changes in position and/or orientation of the machine and relative to the command variable.

Abstract: A cutting assembly is configured to be coupled to a chassis of a mining machine. The cutting assembly includes a ranging arm configured to pivot about a pivot axis relative to the chassis, a motor supported by the ranging arm for the motor to move with the ranging arm about the pivot axis, and a drum including a plurality of cutting picks. The drum is supported by the ranging arm to be driven about a rotational axis by the motor. The cutting assembly includes a pitch adjustment actuator coupled to the ranging arm. The pitch adjustment actuator is operable to move the drum about a pitch axis. The pitch axis extends in a direction between the pivot axis and the rotational axis.

Abstract: The present invention pertains to a method for monitoring operation of a mining machine unit, particularly of a longwall mining system, having a shield unit connected to a material removing unit by means of an actuator for adjusting a distance between the shield unit and the material removing unit, the method comprises the steps of determining a position change of the shield unit during an actuating operation of the actuator; and a step of detecting a malfunction of the mining machine unit based on the determined position change.

Abstract: A tool bit assembly includes a shank having an elongated shaft, an intermediate portion extending from the shaft, a head extending from the intermediate portion, and a tool portion extending from the head. The assembly includes a retainer with a body defining a hollow shaft configured to receive at least a portion of the elongated shaft of the shank therethrough, and a washer defining an opening extending from a first end to a second end of the washer, and the washer having at least a first step and a second step. The opening of the washer is configured to receive at least a portion of the intermediate portion of the shank therethrough. The first step is configured to abut a bottom surface of the head of the shank, and the second step is configured to abut a first shoulder of the intermediate portion of the shank.

Abstract: The invention relates to a ground milling machine, comprising: a machine frame supported by front and rear travel units and at least partially height-adjustable; a milling drum housing arranged on the machine frame, comprising a milling drum that is rotatable about a horizontal axis of rotation perpendicular to the milling direction; a retaining device arranged in front of the milling drum housing in the milling direction with an adjustment device that enables the height adjustment of the retaining device in relation to the milling drum housing and the machine frame; and a ground contact device arranged in front of the milling drum housing in the milling direction with a contact runner and a mounting lever. The contact runner is adjustable in relation to the retaining device within a height-adjustment range and is mounted on the retaining device by way of the mounting lever.

Abstract: A method is to excavate main roadways in the upper and lower parts separately and an inclined intake roadway in the central part of the mine and pre-excavate an inclined seam roadway as the first mining face at the boundary on one side of the mine. Staring from the mine boundary, the retreating mining shall be carried out on the first mining face strip by strip with belt conveyors arranged in the upper main roadway and assistant conveying devices in the lower main roadway and inclined intake roadway; the open-off cut of the first mining face shall be built on the underside of the upper main roadway at the boundary of the mine to carry out the downward inclined mining on the strike and along the inclination.

Abstract: A milling machine can include a frame; a milling assembly coupled to the frame and including a drum housing and a cutting rotor located within the drum housing, the cutting rotor including a plurality of cutting bits configured to cut into a surface to define a cut surface; and a secondary edge cutter separate from the plurality of cutting bits and located to cut an edge of the cut surface such that the edge of the cut surface cut by the secondary edge cutter defines a sharper edge than the edge of the cut surface cut by the plurality of cutting bits.

Abstract: A system may include a first transportation device of a milling machine, a controller, and an inclination control system. The controller can control a construction machine including the first transportation device, which can move the construction machine over an operating surface. The inclination control system includes a first sensor coupled to the first transportation device to sense an orientation of the first transportation device relative to the frame of the milling machine. The controller controls the milling machine based on inclination information received from the inclination control system.

Abstract: Processes and configurations for subterranean resource extraction are provided. The processes include installing borehole strings, such as by drilling a plurality of boreholes, for example, first and second boreholes, that extend from a surface region into a resource deposit. The first and second boreholes are situated adjacent to each other. Portions of the first and second boreholes laterally extend in a penannularly fashion and connect terminally at a nodal space situated within the resource deposit. Carrier fluid is injected from the surface along fluid paths defined by the boreholes to in situ leach resource materials from the resource deposit into the carrier fluid, and carrier fluid containing the resource materials is brought back to surface for resource extraction.

Abstract: A travelling-type tunnel hard-rock micro-damage cutting equipment and a construction method associated therewith are provided. The cutting equipment includes: a crawler-type trolley; and a hard-rock drilling construction apparatus, a hard-rock cutting construction apparatus, a self-unloading tipping bucket and a visual operation terminal all arranged on the crawler-type trolley. The hard-rock cutting construction apparatus includes: a cutting manipulation room, a rock-breaking power arm, and a hard-rock cutting device including a hydraulic steel robs, a signal sensor, an infrared lens and a light source assembly. The infrared lens and the light source assembly are arranged at the front end of the hard-rock cutting device, and a working image can be transmitted to the visual operation terminal through the signal sensor. The cutting equipment can accurately and efficiently cut a rock mass, and the cut rock mass can be reused according to secondary processing conditions of rock to improve economic benefits.

Abstract: This invention relates generally to injection remediation systems and methods. In one embodiment, an injection remediation system includes, but is not limited to, at least one reservoir configured to contain material; at least one load sensor supporting the at least one reservoir; at least one dosing pump operably coupled to the at least one reservoir and configured to controllably source the material; and at least one processor configured to determine an amount of the material sourced from the at least one reservoir based at least partly on weight information obtained from the at least one load sensor.

Abstract: A method of removing cutting bits from a milling work machine includes engaging a cutting bit connected to a rotary drum of the machine with a bit removal tool, actuating the bit removal tool to disconnect the bit from the machine, sensing a plurality of characteristics of removing the bit from the machine, and determining that the bit has been disconnected from the machine based on the sensed characteristics.