Strip-type Wongawilli mining method of coal buried under building

Abstract

The invention discloses a strip-type Wongawilli mining method of coal buried under a building, which includes the steps that the coal mining area under the building adopts a strip type overall arrangement manner to plan the working face, and then a Wongawilli continuous mining method is adopted to conduct short wall backstopping at the mining fields which are located at one side or two sides of a strip type hole drift and angle at 40-60 degrees with the hole drift. The technique provided by the invention can give full play to the respective advantages of strip mining and Wongawilli mining and overcomes the disadvantages of frequent shifting of the working face, low mining efficiency of the strip mining method and the disadvantages of poor aeration condition and poor longtime stability of the coal pillars of the Wongawilli mining method. The method disclosed by the invention realizes efficient recovery of the coal buried under buildings, railways, and water bodies.

Description

technical field [0001] The invention relates to a high-efficiency Wangerville coal mining method for pressing coal under a building and belongs to the technical field of coal mining. Background technique [0002] The research on coal mining under buildings (structures) at home and abroad belongs to the research field of "three under" coal mining. Foreign countries such as Poland and the United Kingdom began to use the strip method to mine coal pressed under buildings in the 1950s, and gained rich practical experience. Both strip mining and Wangerville coal mining method have been studied at home and abroad. Foreign countries such as Poland and the United Kingdom began to use the strip method to mine coal pressed under buildings in the 1950s, and gained rich practical experience. my country has successively carried out strip mining practice in more than 10 provinces and hundreds of working faces in the country, and has obtained rich research results and observation data. T...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of high-efficiency coal mining method of strip-type Wangerville coal mining under the building (structure), which can give full play to the respective advantages of strip mining and Wangerville coal mining method, overcome The disadvantages of frequent relocation, low mining efficiency, poor ventilation conditions and poor long-term stability of coal pillars in Wangerweili coal mining have been eliminated, and efficient recovery of "three-down" compressed coal has been realized

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