Study and practices on zero overlimit gas prevention system of high gassy mine

in order to cortain the phenomenon that gas overlimit frequently occured with the theortcal study and engineering practices the paper analyzed the disaster-causing factors of the gas overinmit and the problems existed in the gas overit control of Wangpe Mine. The paer provided the " thee blocis and thee stages" mining and excavatio planmning and arangement suitable to the features of the high gassy mine and the " one advance and three combination' three dimensional gas drainage system A mine venilaon iteligent decision and control sytem were researched and developed.Ahearly warming index system of the gas overlimit as establisted an a comprehensive cary warning management platfom of the gas overimit control was developed." with the gas drainage as a core,the ventilaton as a base.the gas overinit ariy wamning as a means and the risk pre-control management as a support . he gas control system with " one core and hree matches" as formedAfer the system puting into use,obvious achievements were obtained in the mine gas overlimit conrol.the mine gas drainage volume and drainage rate were obviousl improved.,gas overlinit numbers were highly reduced and a zero gas overlit control target was realized in the year of 2014 and 2015 continuously