The initial inspection was prompted by an anonymous phone call from a miner to an MSHA field office supervisor about weak roof conditions at the mine. During the course of that inspection, enforcement personnel issued a citation for failing to follow mandated procedures after the shutoff of the mine fan. In addition, three orders were issued to the mine operator for intentionally changing the mine ventilation by shutting off and turning back on the mine fan, failing to follow roof control plans and failing to conduct an adequate pre-shift examination.