五阳煤矿7603工作面动压回采巷道围岩控制技术研究

发布时间：2019-01-28 23:44

【摘要】：本文以山西潞安环保能源开发股份有限公司五阳煤矿7603孤岛工作面运输巷为工程背景,运用沿空煤体力学分析了孤岛面覆岩压力分布规律,可知7603运输巷位于高应力区域;根据巷道径向位移公式,运用Matlab数值分析软件作图分析得出影响7603运输巷围岩变形因素主要有两方面因素:巷道围岩压力和围岩体物理力学参数,并提出了7603运输巷两帮“平移”大变形影响因素的对比模拟方案。运用FLAC3D软件建立数值模型,分别模拟对比方案,对模拟数据分析可知:运输巷变形量随着围岩压力的增加而增加,同时随着围岩物理力学参数的减小而增加。根据7603运输巷两帮大变形的理论和模拟分析,结合7603运输巷的具体工程,提出了“携顶底,控两帮”的支护思想,并且设计出六种对比模拟方案,经过模拟对比分析数据得出了最优的巷道支护方案,掘进时7603运输巷两帮移近量仅为295mm;回采时,7603运输巷两帮移近量随着工作面的靠近逐渐增加,最终移近量约为419mm,能够满足安全生产的需要。工业性实践,在7603运输巷道掘进过程中,巷道两帮平均移近量346mm左右;工作面回采过程中,两帮移近量约为490mm。可见,巷道围岩变形破坏得到有效控制,保证了巷道正常的生产使用,为孤岛工作面回采巷道控制两帮大变形技术积累了宝贵的经验。
[Abstract]:Based on the engineering background of Wuyang coal mine 7603 island face transportation roadway of Shanxi Lu'an Environmental Protection Energy Development Co., Ltd., this paper analyzes the distribution law of overburden rock pressure along goaf by using coal body mechanics along goaf. It can be seen that 7603 transport lane is located in high stress area. According to the radial displacement formula of roadway and drawing analysis with Matlab numerical analysis software, it is concluded that there are two main factors affecting the deformation of surrounding rock in 7603 transport roadway: the surrounding rock pressure of roadway and the physical and mechanical parameters of surrounding rock mass. A comparative simulation scheme of the factors affecting the large deformation of the two groups in 7603 transport roadway is put forward. The numerical model was established by using FLAC3D software and the comparison schemes were simulated respectively. The analysis of the simulated data shows that the deformation of transport roadway increases with the increase of surrounding rock pressure and increases with the decrease of the physical and mechanical parameters of surrounding rock. According to the theory and simulation analysis of the large deformation of the two sides of the 7603 transport roadway, combined with the concrete project of the 7603 transport roadway, this paper puts forward the support idea of "carrying the roof and the bottom, controlling the two gangs", and designs six kinds of comparative simulation schemes. The optimal roadway support scheme is obtained by comparing and analyzing the simulation data. When driving, the two sides of 7603 transport roadway are only 295mm; When mining, the two sides of 7603 transport roadway gradually increased with the approaching of the working face, and the final approach was about 419mm, which could meet the needs of safety production. Industrial practice, in the 7603 transport roadway tunneling process, the two sides of the roadway average close to about 346mm, face mining process, the two sides of the movement is about 490 mm. It can be seen that the deformation and failure of surrounding rock of roadway is effectively controlled, which ensures the normal production and use of roadway, and accumulates valuable experience for controlling the large deformation of two groups of roadways in isolated working face.
【学位授予单位】：河南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD355

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