近年来,随着采矿工艺的改进以及各种柴油驱动设备在井下日益推广,天井的用途和名目也不断增多,如局部通风天井,切割天井,道碴溜井,大断面井筒的超前天井等等。据统计,天井掘进量往往占地下开采矿山井巷掘进总长的1/3,有的矿山甚至占采准切割工作量的45%。 In recent years, with the improvement of mining technology and the increasing popularization of various diesel-driven equipment under the well, the use and name of the patio have also been increasing, such as the partially ventilated patio, the cutting patio, the ballast chute, the advanced patio with large cross-section wellbore and the like. According to statistics, the amount of tunneling often accounts for one-third of the total length of underground mining tunnels, and some mines account for 45% of the quasi-cutting workload.