Study on the Influence of Layout of Double Coal Seam Working Face on Overlying Strata

Abstract

The design of mining face is very important, it is not only an basis for rational and effective coal mining, but also affects the subsidence area and surface environment of overlying strata.Taking a coal mine as an example, study the development law of coal mining subsidence under the condition of double coal seam mining by means of the combination of similar material simulation experiment and numerical simulation. The results obtained by the two methods are basically the same. The larger the width of the coal pillar, the smaller the overlapping area of the upper and lower coal seam, and the smaller the influence range of coal seam mining deformation and failure. It is suggested that the mining time and mining distance of the two coal seams should be extended, the width of coal pillar should be increased, so as to slow down the deformation and damage range of overburden, and protect the surface ecological environment.