Conclusions: The myocardial bridge is an anatomic structure with some functions, such as supporting and fixing aeteria coronaria, increasing arteriotony and raising blood supply of myocardium.
Due to the complexity of occurrence condition and the polytropy of influencing factors,the excavation and supporting in soft failure roadway under high ground stress become very difficult.
China has been active in supporting the work of the OPCW and has cosponsored, along with the OPCW, a seminar, as well as several training courses for inspectors.
Aiming at difficulties in supporting dilatable soft rock roadway, control method was put forward to control effectively deformation and failure of dilatable soft rock roadway in Hongmiao Colliery.