Coal mine underground airbridge construction method

Abstract

The invention relates to a coal mining process, in particular to a coal mine underground airbridge construction method which solves the problems of low efficiency, large engineering quantity, long construction period and the like of the existing airbridge construction method. An air return roadway is tunneled directly along a roof of a coal bed by adopting a mechanical tunneling mode and is crossed with a horizontal roadway, and then is tunneled forward continuously to a horizontal plain so as to form a whole roadway system. An airbridge section is formed in the crossing position of the horizontal roadway and the air return roadway, and then the blasting, top brushing and building are conducted on the airbridge section so as to form an airbridge. Compared with the prior art, the coal mine underground airbridge construction method has the advantages that a semi coal rock roadway is tunneled directly to form the roadway, and then subjected to top brushing and building so as to form the airbridge. The construction is simple and easy, the workload is reduced, the cost is low, the construction period is short, and the safety coefficient is high. The work intensity of workers is reduced, the management of the roof is facilitated, the airbridge construction time is shortened, and the linkage arrangement of production groups is facilitated.

Description

technical field [0001] The invention relates to a coal mine mining technology, in particular to a construction method for an underground air bridge in a coal mine. Background technique [0002] Such as Figure 5 As shown, the roadway in a coal panel area of ​​our group mine is arranged in three lanes. During the coal mining process, the original wind bridge construction method is as follows: Image 6 As shown, the return air roadway in the coal panel area is excavated along the roof of the coal seam to 5 meters away from the Hengchuan mouth of the working face. °The rock roadway was excavated 52 meters down the slope, and the construction of the wind bridge was finally completed. [0003] The finally formed wind bridge has an arched section, with a gross section of 15.81㎡ and a net section of 17.37㎡. It is supported by anchor, mesh and spray joints. The support adopts Φ16mm, 1.6m-long twist-shaped resin anchor metal rod body. The model is: MSGM-235 , use one MSK3538 drug c...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of low efficiency, large engineering quantity and long construction period of the existing wind bridge construction method, the present invention provides a coal mine underground wind bridge construction method

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