Full-mining and full-filling coal mining method with reserved working face coal pillar

Abstract

The invention provides a full-mining and full-filling coal mining method with a reserved working face coal pillar. According to the invention, a working face coal pillar is reserved during mining of adjacent work surfaces and a stress concentration area is located in the area of the reserved working face coal pillar during mining, so the location of a tunnel of the adjacent work surfaces is not in the stress concentration area and the degree of stress deformation and fracture is small, thereby guaranteeing safety and convenient maintenance of the tunnel of the adjacent work surfaces, overcoming the problems of complex process, great construction difficulty and influenced filling effect of entry retaining operation and preventing waste of the coal resource; the tops of filling material tunnels of a first-mining working face and adjacent working faces are arranged to be higher than the roof of a coal seam, so crossing of transportation of a filling material and coal mining is prevented; and a local ventilator and a filling and mining hydraulic support move forward together, so smooth ventilation of the tunnel of the adjacent working faces can be guaranteed. Compared with the prior art, the full-mining and full-filling coal mining method has the advantages of no waste of the coal resource, safety, reliability, simple operation and high coal mining efficiency.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a full-mining and full-filling coal mining method in which a coal pillar is set in a reserved working face. Background technique [0002] Coal accounts for about 65% of my country's total primary energy consumption. According to the composition of my country's proven energy reserves and the current energy consumption structure, coal will still be the most important energy source in my country in the foreseeable future. About 90% of my country's coal production is underground mining. Underground coal mining not only destroys the ecological environment of mining areas and damages surface buildings (structures), but also brings serious safety hazards. The fundamental way to solve these problems lies in the improvement of mining space. Reasonable handling. The filling method of coal mining can effectively release the "three downs" of coal pressing and improve the recovery rate o...

AI Technical Summary

Problems solved by technology

If the tunneling method is adopted, and the tunnel is excavated at a certain distance from the first mining face, coal pillars need to be reserved, which wastes coal resources

Generally speaking, the wider the coal pillar is, the safer it is, and the easier it is to maintain the integrity of the roadway, but it also wastes resources

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