In all cases, occurring in or about any mine, of fires, appearance of dangerous gas, breakage of ropes or other gear by which people are hoisted or lowered, overwinding while people are being hoisted, unexpected inrush of water, threatened crushing of mine workings, or any other accident, occurrence or change of conditions tending to increase the hazards of mining whether or not personal injury results, a telephone report, followed by a written report thereof signed by the operator or superintendent, shall immediately be made to the inspector.
225 ILCS 710/6.02