A fluidized coal mining method for surface drilling without roadway

Abstract

The invention discloses a fluidized coal mining method for ground drilling without roadway. The fluidized coal mining system for ground drilling without roadway includes a physical fluidized coal mining part and a coal-rock mixture conveying part; the physical fluidized coal mining part includes Coal mining shaft, high-pressure transportation pipe and high-pressure jet; the coal-rock mixture transportation part includes process inclined shaft, coal-rock mixture lifting shaft and coal-rock mixture transportation pipe. The invention adopts directional drilling technology to connect the bottom end of the coal-rock mixture lifting shaft through the bottom end of the coal-rock mixture lifting shaft to form a coal-rock mixture artesian channel, and utilizes the height difference between the coal mining shaft and the coal-rock mixture lifting shaft to realize hydraulic cutting The fluidized coal-rock mixture below flows into the coal-rock mixture collection bin by itself, and is pumped into the well by the suction pump to realize the unmanned physical fluidized coal mining operation in the mine. Coal mining shafts, process inclined shafts and coal-rock The mixture hoisting shaft can adopt a relatively small drilling hole diameter to achieve a relatively low coal mining cost.

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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