孤岛工作面回采覆岩垮落特征研究

Study on the Characteristics of Overlying Rock Collapse in Isolated Island Working Face Mining

为解决孤岛工作面的开采难题,针对马兰矿前期开采所留设的煤柱形成孤岛工作面,采用现场原位观测+理论解析及模拟数据分析相结合的方法,对孤岛工作面开采的力学特征做了进一步阐明,设计了物理相似模拟试验。根据试验现象和数据,得出了孤岛工作面回采过程中覆岩的垮落特征,对保障孤岛工作面的安全开采、提高煤炭资源的采出率具有重要意义。

To solve the difficult mining problem of the isolated island working face,an isolated island working face is formed according to the coal pillars left in the early mining of Malan Mine.The combined method of on-site in-situ observation+theoretical analysis and simulation data analysis is adopted,the mechanical characteristics of isolated island working face mining are further elucidated,and physical similarity simulation experiments are designed.According to the experimental phenomena and data,the collapse characteristics of the overlying rock during the mining process of the isolated island working face are obtained,which is of great significance for ensuring the safe mining of the isolated island working face and improving the extraction rate of coal resources.