If the auxiliary wellbore cannot be completed in time, the construction period is delayed, and the main and auxiliary wells cannot be short-circuited in time. At this time, the main well should be temporarily modified, and then the connection between the main well and the wind shaft should be arranged to solve the parking lot. Ventilation problems during construction. After the auxiliary wellbore is finished, arrange the connection with the main well as soon as possible, and then carry out permanent equipment. The auxiliary equipment of the auxiliary shaft should speed up the construction progress and strive to replenish the construction period of the auxiliary shaft. The parallel operation and alternate operation can be adopted. If it cannot be fully replenished, the main well should be permanently used after the auxiliary shaft is delivered. Equipment, will repatriate the delayed construction period, otherwise it will affect the total construction period of the mine construction.
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