AN UNINTENDED ROOF FALL OCCURRED IN THE #5 INTERSECTION X-CUT 22 IN THE NORTH SUB MAINS SECTION. NO ONE WAS INJURED AND THERE WERE BREAKER TIMBERS SET ON ALL 4 ENTRIES LEADING TO THE CAVE. THE FALL RANGED 50' LONG, 19' WIDE AND 10' HIGH AT ITS HIGHEST PEAK. DANGERED OFF ALL SIDES AND RECOVERY PLAN MADE.