Mining vehicle and method for its energy supply

The invention relates to a mining vehicle (1) and to a method for its energy supply. The mining vehicle (1) has a carriage (3), driving equipment (4) for moving the carriage (3) and at least one mining work device (2). The mining vehicle (1) has a connection (23) for supplying the mining work device (2) from the electrical network (20) of the mine (18) and an energy source (25) for supplying energy to the driving equipment (4). The energy source (25) is charged by using a generator (33), and the mechanical energy arranged to rotate the generator (33) is obtained from the electrical network (20) of the mine (18), whereby the electric energy from the electrical network (20) of the mine (18) is transformed into mechanical energy, which is arranged to rotate the generator (33).