基于相似模拟实验的采动裂隙场演化规律研究

针对目前综放开采条件下对顶板岩移破坏时空演化规律研究不足的问题,采用相似模拟实验的方法对综放开采条件下覆岩移动和破坏机制以及采动裂隙分布规律和形态特征进行研究,结果表明:随工作面推进裂隙带逐渐地往上演化发展,而且当关键性岩层垮落断裂时,这种裂隙演化更为迅速;当工作面回采至240m时,离层裂隙趋于闭合,采动影响达到模型的顶部,裂隙带高度不再随着工作面推进距离的变化而改变。

Study on the Law of Mining- induced Fractures Field Evolution Based on Similar Simulation Experiment

Aiming at the problem of insufficient study on the law of roof strata movement destruction space - time evolution under the current conditions of fully mechanized top coal caving, utilizing the method of similar- ity simulation experiment to aim at doing study on overlying strata movement under the conditions of fully mechanized top coal caving, destruction mechanism, and the distribution law and morphological characteristics in mining- induced fractures, the results show that： with the working surface advancing, the fractures zone gradually upgrade evolving and developing, and this kind of fractures evolution is more rapidly when the key strata cave and fracture, when the working surface mine to 240m, the bed separation fractures tend to be closed, Mining influence reaches the top of the model, the fractures zone height no longer change with the change of the working face advance distance.