Study on Strip Type Wongawilli Coal Mining Technology Under Buildings

In order to solve the difficult problems of a safety and high efficient mining of coal resources under buildings, the theoretical calculation and the numeric al simulation means were applied to the analysis and study on the strip Wongawilli mining technology.ln combination with the mine geological information, a design on t he strip Wongawilli miming plan was conducted and design parameters and mining technique of the gateway support were determined.The numerical simulation was ap plied to analyze and study the variation conditions of the stress filed, displacement field and plastic zone in the surrounding rock of the strip Wongawilli mining face and to calculate and analyze the movement deformation value of the surface ground after the coal mining completed and the influences to the surface buildings.The study re sults showed that with the application of the strip Wongawilli mining technology, the mining speed was fast, the efficiency was high, the surface movement time was sho rt and the surface ground movement deformation value could be effectively controlled during the safety and high efficient mining of the coal resources.