通过相似材料模拟实验,分析了含瓦斯厚煤层顶分层开采时支承压力对煤层底板的破坏作用,并根据压力分布和破坏程度对煤层底板裂隙沿深度方向进行定性定量分带,计算出底板最大破坏深度及其位置,探讨了各分带瓦斯运移特征,进而阐述了顶分层开采对下分层的解放作用,为安全、合理开采含瓦斯厚煤层且有效抽排煤层瓦斯提供了理论依据。 Based on similar material simulation experiments, the destructive effect of bearing pressure on the coal seam floor during the top stratified mining with thick coal seam was analyzed. According to the pressure distribution and the degree of damage, the fracture of the coal floor was qualitatively and quantitatively zoned along the depth direction to calculate the maximum The destructive depth and the location of the gas, and explores the characteristics of gas migration in each zone, and then expounds the liberation of the top stratified mining on the lower stratification, which provides a theoretical basis for the safe and reasonable exploitation of the thick coal-bearing gas and the effective drainage of coalbed methane .