Roadway-free ground drilling fluidization coal mining method

Abstract

The invention discloses a roadway-free ground drilling fluidization coal mining method. A roadway-free ground drilling fluidization coal mining system comprises a physical fluidization coal mining part and a coal-rock mixture conveying part; the physical fluidization coal mining part comprises a coal mining vertical shaft, a high-pressure conveying pipe and a high-pressure jet device; and the coal-rock mixture conveying part comprises a process inclined shaft, a coal-rock mixture lifting vertical shaft and a coal-rock mixture conveying pipe. The bottom end of the coal mining vertical shaft and the bottom end of the coal-rock mixture lifting vertical shaft communicate with each other and are connected by adopting a directional drilling technology to form a coal-rock mixture self-flowing channel, by means of the height difference between the coal mining vertical shaft and the coal-rock mixture lifting vertical shaft, the coal-rock mixture which is cut by hydraulic power and is in a fluidized state automatically flows into a coal-rock mixture collecting bin and is pumped into the well through a slurry suction pump, the underground unmanned physical fluidized coal mining operation is achieved, and the coal mining vertical shaft, the process inclined shaft and the coal-rock mixture lifting vertical shaft can all adopt relatively small drilling apertures, so that relatively low coal mining cost is realized.

Description

technical field [0001] The invention relates to a physical fluidized coal mining method, in particular to a non-roadway ground drilling fluidized coal mining method, which belongs to the technical field of coal mining. Background technique [0002] In my country's energy system, coal resources account for about 97% of the total proven fossil energy resources, and coal resources are still the main energy for safe and stable energy supply. At present, except for a small amount of open-pit coal mining, more than 90% of coal mines in China adopt underground mining, that is, coal mining is carried out by arranging coal mining roadways underground, and the coal is transported to the ground through the transportation system. The most commonly used method is It is a longwall retreating face coal mining method. On the one hand, this traditional underground mining method requires the construction of a large number of coal mining roadways and supporting production chambers, with a hug...

AI Technical Summary

Problems solved by technology

However, this coal mining method still needs to dig a bottom roadway in the coal seam floor, and a large amount of mechanical equipment needs to be arranged in the bottom roadway, which requires operators to work underground, complex coal and rock transportation equipment, and relatively high coal mining costs.

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