On Tuesday, April 28, I attended the lecture on underground mining methods and equipment conducted by Mr. Greg You. He worked in Thailand, and spent almost 7 years on mining job there before he has became teacher. It would be interesting to me. This week lecturer just focus on shaft and tunneling in underground mines. The course was aimed at junior student and will give theories which are related to underground mining methods and equipment. This short reflection will describe the principle on shaft and tunneling, the lecture's approach, the students' participation and the overall relevance to me. Mr. You spent time 2 hours for this lecture and the lecture were divided into 2 sessions and break time. Beginning to the first sessions, he point out on how to design shaft and then, how to maintenance shaft. Shaft typically have two types: vertical shaft and inclined shaft. Vertical shaft is used for hoisting mined ore and a ventilation shaft to circulate between inside air and fresh air. Inclined shaft is excavated for transportation and supplies in underground mine. He also tough us how to design shaft under many factor such as size ,shape and drilling pattern. Next to maintenance shaft, he showed the various methods to maintain shaft for example concrete block, concrete monolithic, reinforced, Tubbic by cast iron, shortcrete and anchor bolt. I found that shortcrete is quite common that he give priority to us. For the second session, tunneling is very important to get loss and profits. Mr. You gave his idea and showed the important of tunneling. From his experiences, he provide us with anecdotes to encourage students connect to his topic. He spoke about how to design tunnel. There are two pattern for drill tunnel: cut hole burn and cut spreader. Lots of questions were in my brain because they are more equation's design. I just knew basic from his equation that he provided but I kept going to concentrate with topic. I found that tunnel is