This paper was completed under the careful guidance and strong support of Mr. Yao. Teacher Yao's rigorous and realistic learning attitude, high professionalism, serious and diligent work style and enterprising spirit of bold innovation have had an important impact on me. His profound knowledge, broad vision and keen thinking inspired me deeply. At the same time, I also learned a lot about mine ventilation and safety in the graduation project, and my experimental skills have been greatly improved.

In addition, thanks to the guidance of the mine on my internship and thesis writing, which provided great help for me to complete this thesis. I would also like to thank the leaders in the mine and some classmates for their selfless help, which enabled me to finish my thesis smoothly. At the same time, the leaders in the mine often help me and provide great help in collecting information! I also sincerely thank him here.

Finally, once again, I would like to express my heartfelt thanks to the teachers who care about me and the mine leaders and classmates who helped me!