不同类型采场冲击地压危险预测体系研究

发布时间：2019-04-23 21:43

【摘要】：近年来随着我国越来越多的矿井进入深井开采,煤矿冲击地压已经成为我国乃至世界各大矿井安全生产和井下作业人员人身安全的主要障碍之一。目前我国很多深井矿井由于地面压煤等原因,采用大条带开采,首采面一般工作面两侧都为实体煤,随后便要开采一侧采空、两侧采空甚至“孤岛”工作面,不同的边界条件下工作面所处的应力场有很大的差别,其发生冲击地压的危险性也有很大的差别。因此很有必要结合不同类型采场,综合考虑影响冲击地压的各个因素,建立一个统一的冲击地压危险性预测体系。论文通过采用覆岩空间结构及关键层理论分析、数值模拟等方法,对朝阳煤矿的几个不同类型采场的覆岩空间结构形式、运动规律以及应力场分布进行了横向对比,直观的反映了不同类型采场所处应力场以及发生冲击地压危险性的差别。同时首次将不同类型采场冲击地压危险性的差别与影响冲击地压事故的诸多因素相结合,建立了一个统一的冲击地压危险性预测体系,打破了以往适用于某一特定的开采条件和采场类型的单一预测体系。此外,论文还利用所建立的基于不同采场类型冲击地压危险预测体系对朝阳煤矿3201工作面的冲击危险区域进行了预测,并结合现有的微地震监测结果以及现场冲击地压发生的实际情况对这一预测结果进行了验证,保证了预测结果的准确性。
[Abstract]:In recent years, with more and more mines entering deep mining in our country, coal mine rock burst has become one of the main obstacles to safe production and personal safety of underground workers in our country and even in the world. At present, many deep-well mines in China have adopted large strip mining due to ground coal pressure and other reasons. Both sides of the first mining face are usually solid coal, and then one side of the goaf, two sides of the goaf and even the "isolated island" face will be mined. The stress field of the working face under different boundary conditions is very different, and the risk of rock burst is also very different. Therefore, it is necessary to establish a unified prediction system of rock burst risk by combining different types of stope and considering all the factors that affect the impact rock pressure. By using the methods of theoretical analysis and numerical simulation of overlying rock space structure and key strata, the paper makes a horizontal comparison on the spatial structure form, movement rule and stress field distribution of several different types of stope in Chaoyang Coal Mine. It can directly reflect the difference of stress field at different types of mining site and the risk of rock burst. At the same time, for the first time, the difference of rock pressure risk of different types of stope is combined with many factors that affect the impact of rock pressure accident, and a unified prediction system of rock burst risk is established. It breaks the previous single prediction system applicable to a particular mining condition and stope type. In addition, the paper also makes use of the prediction system based on different stope types to predict the impact risk area of 3201 face in Chaoyang Coal Mine. Combined with the existing monitoring results of micro-earthquakes and the actual situation of rock burst in the field, the prediction results are verified to ensure the accuracy of the prediction results.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD324

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