关键词: 反井钻井, 特殊地层, 立井, 瓦斯, 注浆

Abstract: The raise boring has the advantages of high mechanization, fast construction speed and good safety. When using the raise boring construction to replace the ventilation shaft in the mining area, the existing roadway and production system in the underground mine can be fully utilized. The mechanical rock breaking phase has lower disturbance intensity than the blasting rock, and the shaft support stability is good. It is conducive to the protection of the environment after mining and closed pits. The formation conditions are one of the important factors that determine whether the large diameter raise boring construction is going smoothly. According to the geological conditions of the proposed ventilating shaft and the design requirements of the shaftbore. Specific raise boring equipment and related parameters were determined. Technical difficulties in the construction of raise boring through special strata are proposed. The key technologies for the construction of the raise boring foundation platform and the use of pre-grouting technology to reinforce unstable formations are given. Through the implementation of ventilation and cooling technology, the raise boring has successfully passed through the gas-bearing coal seam. It provides a ref-erence for the construction of reverse shaft drilling to replace the ventilation shaft in the mining area.