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Hydraulic coal mining method without underground drilling

A coal mining method and hydraulic technology, which can be used in earth-moving drilling, underground mining, mining fluids, etc., can solve problems such as gas explosion, roof collapse or water penetration, and achieve the effect of ensuring life safety.

Inactive Publication Date: 2003-02-19
曾细平 +2
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Problems solved by technology

[0002] At present, my country's coal mines adopt the method of artificially going down into the mine for roadway mining, but for some coal mine bodies with high gas, easy roof collapse or extremely rich groundwater, gas explosions, roof collapse or water seepage accidents are prone to occur. Especially prominent, frequent serious casualties

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  • Hydraulic coal mining method without underground drilling
  • Hydraulic coal mining method without underground drilling
  • Hydraulic coal mining method without underground drilling

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] The unmanned downhole drilling hydraulic coal mining method is divided into: single well cavity expansion pre-mining stage and inclined hole connected long-distance mining stage.

[0028] 1. The pre-exploitation stage of single well cavity expansion, see figure 1 .

[0029] 1. Vertical well drilling and completion.

[0030] The vertical shaft is also called the vertical shaft. Its drilling depth is 2 meters below the floor of the coal seam 6 to be mined, and the mining pipe string 3 is lowered to the roof 4 of the coal seam. It can be reused after mining.

[0031] 2. Run into the production string and production equipment.

[0032] Production string 3 is made up of four layers of pipes 10, 11, 12, 13, see figure 2 , the four-layer tubes form four independent channels 15, 16, 17, and 18. Channels 15 and 16 are respectively injected with high...

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Abstract

A hydraulic coal-mining technology without underground manual drilling features that at least one vertical shaft and one inclined shaft are drilled. The high-pressure water channel, compressed air channel, mining tubular column with dregs returning barrel, and the mining apparatus consisting of jet nozzle, mixing chamber and drill bit are installed in said vertical shaft. The drill rod, jet nozzle and the drill bit of jet-type mining apparatus are installed in said inclined shaft. Its advantages are underground washing of coal for high coal quality, and mining both coal and coal-seam gas for less atmosphere pollution.

Description

technical field [0001] The invention relates to a coal mining method, in particular to a hydraulic coal mining method for unmanned downhole drilling. Background technique [0002] At present, my country's coal mines adopt the method of artificially going down into the mine for roadway mining, but for some coal mine bodies with high gas, easy roof collapse or extremely rich groundwater, gas explosions, roof collapse or water seepage accidents are prone to occur. Especially prominent, frequent serious casualties. In 2000, there were 75 accidents in coal mines across the country that killed more than 10 people. Among them, 18 occurred in key state-owned coal mines, such as the "9.27" gas explosion accident in Muchonggou, Shuicheng, Guizhou, and the "11.25" gas explosion accident in the No. 2 Mine of Dayan Bureau, Inner Mongolia. Explosion accidents, gas explosion accidents in Yongdingzhuang, Datong, Shanxi, etc. In just two months from May to July 2002, there were more than te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/29E21C41/18
Inventor 曾细平刘忠向钢锯
Owner 曾细平
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