In order to reveal the influence of air leakage on oxygen concentration in goafs fully mechanized caving mining with a shallow buried and high height, No.122108 working face Caojiatan coal mine different seasons was tested by SF 6 tracer gas test method. Based result test, “three zones” spontaneous combustion goaf were simulated using Ansys Fluent fluid dynamics software, compared that field te...

The number of large coal power plants, characterized by pithead is increasing rapidly in major mining countries around the world. Overburden movement caused and greenhouse gas emissions thermal generation are intertwined, have become important challenges for mine ecological environment protection at present future. In order to provide more options green a base northwest China was taken as resea...

Grouting reinforcement is one of the most effective methods to enhance stability goaf, and its scheme selection, hole location, parameter determination directly affect success or failure goaf treatment. On basis discussion deformation mechanism evolution law longwall this article comprehensively analyzed grouting combined with filling theory, permeability fracturing theory studied physical chem...