Section 75.389 - Mining into inaccessible areas (a) - (1) The operator shall develop and follow a plan for mining into areas penetrated by boreholes drilled under 75.388.
- (2) Mining shall not resume into any area penetrated by boreholes until conditions in the penetrated area can be determined under 75.388 and the plan for mining-through into the area has been approved by the district manager.
- (3) A copy of the procedures to be followed shall be posted near the site of the mining-through operations and the operator shall explain these procedures to all miners involved in the operations.
(b) The procedures specified in the plan shall include- - (1) The method of ventilation, ventilation controls, and the air quantities and velocities in the affected working section and working place;
- (2) Dewatering procedures to be used if a penetrated area contains a water accumulation; and
- (3) The procedures and precautions to be followed during mining- through operations.
(c) Except for routine mining-through operations that are part of a retreat section ventilation system approved in accordance with 75.371(f) and (x), the following provisions shall apply: - (1) Before and during mining-through operations, a certified person shall perform air quality tests at intervals and at locations necessary to protect the safety of the miners.
- (2) During mining-through operations, only persons involved in these operations shall be permitted in the mine; and
- (3) After mining-through, a certified person shall determine that the affected areas are safe before any persons enter the underground areas of the mine.
053-4 Wyo. Code R. § 75.389