A hydraulic assembly for a mining system is disclosed. The hydraulic assembly may have at least one control valve for controlling a supply of hydraulic fluid to a hydraulic actuator of the mining system. The hydraulic assembly may also have at least one temperature sensor associated with the at least one control valve. The at least one temperature sensor may be configured to measure a temperature of the at least one control valve. In addition, the hydraulic assembly may have a control unit in communication with the at least one temperature sensor. The control unit may be configured to receive the temperature measured by the at least one temperature sensor. The control unit may also be configured to determine that a leakage has occurred in the at least one control valve based on the temperature.

A hydraulic assembly for a mining system is disclosed. The hydraulic assembly may have at least one control valve for controlling a supply of hydraulic fluid to a hydraulic actuator of the mining system. The hydraulic assembly may also have at least one temperature sensor associated with the at least one control valve. The at least one temperature sensor may be configured to measure a temperature of the at least one control valve. In addition, the hydraulic assembly may have a control unit in communication with the at least one temperature sensor. The control unit may be configured to receive the temperature measured by the at least one temperature sensor. The control unit may also be configured to determine that a leakage has occurred in the at least one control valve based on the temperature.

The present invention refers to a roof support unit (10) for a mining machine, particularly for a longwall mining system, comprising a support canopy (14) which is supported on a base (16) via at least one damper unit (18) and at least one actuator (20) configured to move the support canopy (14) relative to the base (16).

The present invention refers to a roof support unit (10) for a mining machine, particularly for a longwall mining system, comprising a support canopy (14) which is supported on a base (16) via at least one damper unit (18) and at least one actuator (20) configured to move the support canopy (14) relative to the base (16).

A fluid driven cylinder having an integrated fluid channel. The fluid driven cylinder including an extended bar with a first surface continuously contacting the hydraulic cylinder barrel and a hydraulic fluid passage extending into a fluid chamber of the cylinder formed inside the extended bar.

A fluid driven cylinder having an integrated fluid channel. The fluid driven cylinder including an extended bar with a first surface continuously contacting the hydraulic cylinder barrel and a hydraulic fluid passage extending into a fluid chamber of the cylinder formed inside the extended bar.