摘要
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。
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.
出处
《华北科技学院学报》
2014年第2期59-63,共5页
Journal of North China Institute of Science and Technology
基金
河北省重点基础研究项目(11965629D)
国家自然科学基金资助(51204070)
中央高校基本科研业务费资助(2012E1202
2011SYSJJ01)
教育部"新世纪优秀人才支持计划"(NCET-11-0837)
关键词
相似模拟实验
裂隙演化
离层裂隙
Similarity simulation experiment
Fractures evolution
Bed separation fractures
