Supervision coalmining

In the meantime, USA in its mining industry possesses rigorous safety supervision and law enforcement system. The key of its success is represented in up-to-down coalmine safety supervision framework, rotational supervision personnel system, thunder-patterned supervision and law enforcement force. Furthermore, in the structure of the mechanism, a community of interest including the supervisors, mine operators and local governments is avoided. 

These field offices have no relation of interest with the mine operators, or with the state and county government. The federal safety supervisions must exchange their posts in rotation every two years. If a coalmine accident involves three or more deaths, the local safety supervisors are disqualified from participating in the accident investigation. Instead, the federal office will dispatch safety supervisors in other regions to do so. These measures ensure objective and impartial supervision and accident investigation. 

Once a coalmine accident occurs, relevant person on the scene shall immediately report to the coalmine operator. The operator shall within one hour report to the safety supervision department, coalmine safety supervision department above county level and the residing coalmine safety supervision office. In emergency, relevant person on the scene may directly report to the above organizations ... 

Once the coalmine safety supervision sub-bureau receives an accident report, it shall within 2 hours report to the provincial-level coalmine safety supervision authority ... 

Serious accidents are investigated by the provincial-level coalmine safety supervision authority ... 

In all types of coalmine accidents, gas explosion occupied the largest share of the major accidents (Coal Mine Safety Supervision Bureau of the State 2012). Except by using engineering technology such as technical equipment or skills to prevent the gas explosion, understanding the law of the accident can also help the people to avoid repetitive accidents. Accident analysis results showed that nearly 100% of gas explosions are liability accidents, and the direct cause is unsafe act. 

---