A mining machine including a chassis, an actuator, a cutter drum supported by the chassis, the cutter drum driven by the actuator, a cutter bit coupled to the cutter drum, and a controller. The controller includes a processor and memory and is configured to measure a characteristic of the actuator, determine the cutter bit is worn based on the measured characteristic of the actuator, and output a signal when the cutter bit is determined to be worn.

Aspects of the present disclosure relate to display structures for displaying the wear status of reducing elements (e.g., chisels, teeth, etc.) on a reducing component. In certain examples, the display structure can include a matrix that visually depicts all of the reducing elements of the reducing component in a row and column format. The wear status of the reducing elements can be indicated by techniques such as different colors, different numbers, different letters, shapes, bar codes etc. Another aspect of the present disclosure relates to an autonomous system where a remote party can simultaneously monitor the wear status of the reducing elements of multiple machines on the display structure. For each machine, the remote party (e.g., operator, supply source, supervisor, and main office) can each receive a wireless signal indicating when the reducing elements are approaching a need for replacement.

Aspects of the present disclosure relate to display structures for displaying the wear status of reducing elements (e.g., chisels, teeth, etc.) on a reducing component. In certain examples, the display structure can include a matrix that visually depicts all of the reducing elements of the reducing component in a row and column format. The wear status of the reducing elements can be indicated by techniques such as different colors, different numbers, different letters, shapes, bar codes etc. Another aspect of the present disclosure relates to an autonomous system where a remote party can simultaneously monitor the wear status of the reducing elements of multiple machines on the display structure. For each machine, the remote party (e.g., operator, supply source, supervisor, and main office) can each receive a wireless signal indicating when the reducing elements are approaching a need for replacement.

A squeezing device for an underground project, comprising a guide body, a vibration system, a lubricating system, a guide system, a cutting mechanism and a gate, wherein the vibration system is located on four walls of the guide body, the lubricating system is internally provided with a lubricating pipeline along the four walls of the guide body and communicates with a corresponding lubricating nozzle, the guide system is located on four walls at a front end of the guide body, and the cutting mechanism is located at a front end of an inner cavity of the guide body, and the gate is located in a functional bin.

A tool holder is disclosed for use with a milling drum. The tool holder may have a cylindrical body defining a first end and a second end, the first end configured to be received within a tool mounting block of the milling drum, the second end configured to receive a cutting bit. A flange may be located between the first and second end with respect to an axial direction, and a first bore, with a first opening defined by the second end and extending towards the first end. A frustoconical portion may be located between the flange and the first end with respect to the axial direction and a cylindrical portion located between the flange and the first end. At least one radial opening may pass through at least the wall of the cylindrical portion to intersect or be open to the first bore.

A tool holder is disclosed for use with a milling drum. The tool holder may have a cylindrical body defining a first end and a second end, the first end configured to be received within a tool mounting block of the milling drum, the second end configured to receive a cutting bit. A flange may be located between the first and second end with respect to an axial direction, and a first bore, with a first opening defined by the second end and extending towards the first end. A frustoconical portion may be located between the flange and the first end with respect to the axial direction and a cylindrical portion located between the flange and the first end. At least one radial opening may pass through at least the wall of the cylindrical portion to intersect or be open to the first bore.

The present disclosure provides a machine (100) for surface mining or road milling. The machine (100) is arranged to remove material from a ground region (102) while moving along the ground region (102) and comprises a ground engager for removing a portion of the material from the ground region (102). The machine (100) further comprises a detecting system (110) that has at least one detector element coupled to a component of the machine (100) to move with the machine (100) and arranged to detect at least one quantity associated with an electrical property of the ground region (102). The detecting system (110) is arranged to provide composition information concerning a composition of at least one material layer in the ground region (102) and thickness information concerning a thickness of at least one material layer (102a,b,c,d). The detected at least one quantity associated with the electrical property is used to provide at least one of the composition information and the thickness information.

The present disclosure provides a machine (100) for surface mining or road milling. The machine (100) is arranged to remove material from a ground region (102) while moving along the ground region (102) and comprises a ground engager for removing a portion of the material from the ground region (102). The machine (100) further comprises a detecting system (110) that has at least one detector element coupled to a component of the machine (100) to move with the machine (100) and arranged to detect at least one quantity associated with an electrical property of the ground region (102). The detecting system (110) is arranged to provide composition information concerning a composition of at least one material layer in the ground region (102) and thickness information concerning a thickness of at least one material layer (102a,b,c,d). The detected at least one quantity associated with the electrical property is used to provide at least one of the composition information and the thickness information.

A tool holder is disclosed for use with a milling drum. The tool holder may have a cylindrical body defining a first end and a second end, the first end configured to be received within a tool mounting block of the milling drum, the second end configured to receive a cutting bit. A flange may be located between the first and second end with respect to an axial direction, and a first bore, with a first opening defined by the second end and extending towards the first end. A frustoconical portion may be located between the flange and the first end with respect to the axial direction and a cylindrical portion located between the flange and the first end. At least one radial opening may pass through at least the wall of the cylindrical portion to intersect or be open to the first bore.

A tool holder is disclosed for use with a milling drum. The tool holder may have a cylindrical body defining a first end and a second end, the first end configured to be received within a tool mounting block of the milling drum, the second end configured to receive a cutting bit. A flange may be located between the first and second end with respect to an axial direction, and a first bore, with a first opening defined by the second end and extending towards the first end. A frustoconical portion may be located between the flange and the first end with respect to the axial direction and a cylindrical portion located between the flange and the first end. At least one radial opening may pass through at least the wall of the cylindrical portion to intersect or be open to the first bore.