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为研究特厚松散层薄基岩煤层上覆岩层在采动影响下裂隙的发育演化规律,结合赵固一矿11011工作面地质条件和开采技术条件,采用相似材料模拟试验模拟了覆岩裂隙演化的全过程,并利用分形几何理论研究了裂隙网络分形维数与工作面推进度、矿山压力、覆岩下沉、上三带之间的关系。研究结果表明:采动所形成的裂隙网络可以较好的表征岩体的结构特征;裂隙的形成、发育、扩展、分布具有较好的自相似性和分形特征,可以用分形维数描述裂隙网络的二维空间特征;裂隙网络分形维数随着开采宽度的增加而增加,但增加趋势逐渐减缓;分形维数与矿山压力、覆岩下沉之间呈非线性关系;分形维数可以较好的表征上三带裂隙发育特征.
In order to study the development and evolution of the overburden strata in the overburden coal seam with ultra-thick unconsolidated thin coal seam under the influence of mining conditions, this paper simulates the fissure evolution of the overlying strata with similar material simulations, based on the geological conditions and mining conditions of 11011 working face in ZhaoGuyi Mine The fractal geometry theory is used to study the relationship between fractal dimension of fractured network, propulsion of working face, pressure of mine, overlying strata subsidence and the upper three belts. The results show that the fractured network formed by mining can well characterize the structural features of the rock mass. The formation, development, expansion and distribution of the fractures have good self-similarity and fractal characteristics. Fractal dimension can be used to describe the fracture network The fractal dimension of fractured network increased with the increase of mining width, but gradually increased with the increase of mining width. The fractal dimension was nonlinear with the pressure of mine and the settlement of overlying rock. The fractal dimension could be better Characterization of Upper Trike Belt Fracture Development Characteristics.