Recently, Dongchen Gongmao Tarik District No. 2 mine +1200m (that is, 449 meters underground) horizontal main and auxiliary inclined shaft contact lane smoothly through.

The roadway connecting the main and auxiliary inclined Wells at +1200m level has a total length of 34.6m, a slope of 4%, a straight wall semicircular arch section, and a driving section of 18.62m². Before the penetration, the contractor, Department 36 of China Coal No. 3 Construction, actively organized surveyors to measure the elevation of both sides of the floor, and provided the enlarged picture of the penetration construction. Each shift group was required to fill in the progress on the enlarged picture according to the construction situation. During the construction, the deviation of advance drilling is adopted to reinforce the through roof in advance. The implementation of a series of measures provides a guarantee for the smooth connection of the lane.

The smooth connection of the main and auxiliary inclined shafts at +1200m level has laid a key foundation for optimizing the mine power supply and transportation system as well as the excavation of the main inclined shaft, and accelerated the mine production layout. In the next step, the construction of the temporary substation and the transportation system installation project of the main inclined shaft working face will be taken as the focus to accelerate the formation of the driving conditions of the main inclined shaft working face, and strive to achieve the levelling and multi-heading of the main and auxiliary inclined shaft as soon as possible, so as to ensure that the phased schedule target conforms to the total construction period decomposition plan.