A B767 FLC FINDS THEMSELVES ON AN UNAUTH TXWY AT BRU ARPT. IN TRYING TO TURN AROUND; THE JET BLAST INJURES A FOREIGN AIRLINE MAINT PERSON.

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AFTER LNDG AFTER AN 8 HR FLT; TAXI INSTRUCTIONS WERE GIVEN AND ACKNOWLEDGED BUT FOREIGN LANGUAGE TO OTHER ACFT AND A BUSY GND CTLR MADE IT HARD TO UNDERSTAND REAL CLR THE EXACT INSTRUCTIONS. ON THE INNER TXWY; WE SAW A B737 TAXIING ON TXWY M AND OUR ACFT WAS GOING TOWARD A B767 IN OPPOSITE DIRECTION ON THE INNER FACING US (PAST TXWY M). THE OUTER TXWY HAD ACFT THAT WERE DEPARTING RWY 25R BRU. MY FO STATED THAT TXWY M WAS THE ONLY WAY TO GO. WHEN WE TURNED ON TXWY M; GND CALLED FOR US TO STOP. WE DID AND FOUND TXWY M NOT STRESSED FOR OUR ACFT SIZE. ASKED IF WE COULD MAKE A 180 DEG TURN. WE SAID WE NEEDED GND HANDLING (TAXI HANDLING ASSISTANCE). THERE WAS A DASH 8 ACFT ON OUR R WITH 2 MEN WORKING ON IT (IN SOME MANNER) AND A TIGHT TURN L WAS REQUESTED BY GND. WE GOT A GND HANDLER AND WITH HIS HELP AND THE 2 MEN NEAR THE DASH 8 (WHO SHOWED WE WERE CLR OF THAT ACFT) WE MADE A 180 DEG TURN L. WHILE IN THE TURN; MORE THAN IDLE PWR WAS USED. AFTER SHUTDOWN AT THE GATE; THE ARPT AUTH REQUESTED A WRITE-UP AS THE DASH 8 OR ONE OF THE 2 MEN AT THE DASH 8 MAY HAVE BEEN INJURED. WHILE IN THE ARPT OFFICE; I WAS TOLD THAT THERE WAS NO ACFT DAMAGE AND THAT BOTH MEN WERE AT WORK. MY JUDGEMENT WAS THAT I WAS BEING GIVEN TURN SIGNAL BY THE GND HANDLER AND ALL CLR BY THE 2 MEN BY THE DASH 8 AND IT WAS CLR TO CONTINUE THE 180 DEG TURN.