Research on collaborative control technology of coal spontaneous combustion and gas coupling disaster in goaf based on dynamic isolation

Abstract

Coupled thermodynamic disasters in goaf, such as coal fires and gas explosions have long been one of the most serious disasters in major accidents of coal mines worldwide. In the case of deep mining becoming the new normal of future mine mining, there is still a lack of targeted technical methods for the prevention and treatment of major thermodynamic disasters, especially coal spontaneous combustion and gas coupling disaster. Rapid dangerous region identification and effective prevention of such disasters in goaf is extremely important for mine safety production. Based on the analysis of the coupling relationship between coal spontaneous combustion and gas disaster in fully mechanized caving goaf and the mechanism of collaborative control technology, coal spontaneous combustion and gas disaster formation characteristics, occurrence process and prevention and control methods were fully utilized. By injecting isolation material through the interval between the hydraulic support frames to form a row of discontinuous isolation blocking zones, a dynamic pressure injectionisolation technology for collaborative control of coupling thermodynamic disaster in goaf in special mining period was proposed and the isolation parameters of the field goaf were designed. The field measurement was carried out to obtain data and the distribution characteristics of spontaneous combustion-prone. The gas drainage and collaborative control efficiency befor an after isolation were verified. Our approach offers a new concept and method to identify and collaboratively control of coal spontaneous combustion and gas coupling disasters in goaf, which provides theoretical and technical ideas for the prevention and control of such disasters and guarantees the safe and efficient mining of deep mines.