A treatment method for abandoned vertical shaft shafts that penetrate through the upper and lower coal seam mining faces at close distances

Abstract

The invention discloses a treatment method for a waste vertical well shaft penetrating through an upper close-distance coal seam stope working face and a lower close-distance coal seam stope working face and belongs to the field of coal mining. According to the treatment method for the waste vertical well shaft, the waste shaft is reinforced, false tops and false bottoms are formed on the penetrated upper close-distance coal seam stope working face and the penetrated lower close-distance coal seam stope working face, and thus equipment can pass safely and smoothly. According to the technical scheme, the treatment method comprises the steps that the parts, at the bottoms of coal mining seams, of the shaft are reinforced in a mode of filling coal gangue and pouring concrete or a mode of arranging a ladder beam and pouring the concrete, and thus the working face false bottoms are formed; the parts, on the tops of the coal mining seams, of the shaft are reinforced in a mode of steel beam supporting and concrete pouring, and thus the working face false tops are formed; and a flexible supporting layer is arranged between the upper coal seam and the lower coal seam through timber cribs. The treatment method can be widely applied to the field of coal mining.

Description

technical field [0001] The invention discloses a treatment method for an abandoned vertical shaft that runs through the upper and lower coal seam recovery working faces at a short distance, and belongs to the technical field of coal mining. Background technique [0002] With the increase of mining intensity of coal resources, the mining conditions of coal seams are becoming more and more complex. my country's coal resources have been mined in different historical stages, and a large part of production mines will be affected by closed mines, especially in the process of coal resource integration. Several small coal mines have been merged and reorganized into new large mines, and the disposal of small coal mines that have been closed and abandoned shafts has inevitably become a considerable problem in the production of merged and reorganized mines. For the abandoned shafts in the coal mining face, the methods commonly used at present are to leave protective coal pillars, shorte...

AI Technical Summary

Problems solved by technology

For the abandoned wellbore in the coal mining face, the methods commonly used at present are to leave a protective coal pillar, shorten the working face, re-cut the hole, and relocate the equipment. The main problems are as follows: (1) Leaving a protective Coal pillars reduce the resource recovery rate, reduce the economic benefits of the working face, and make the succession of mine excavation more tense; (2) shorten the working face and re-open the eye, increasing the amount of roadway excavation, construction period and excavation cost; (3) ) The relocation of equipment consumes production time, increases production costs, and reduces the production efficiency of the working face; Potential safety hazards in the working face, therefore, how to deal with abandoned shafts and ensure the safety of the working face is a technical problem to be solved urgently in the coal industry