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Underground no pillar recovery method of coal mine

A recovery method and a coal pillar-free technology, which is applied in mine/tunnel ventilation, ground mining, mining equipment, etc., can solve problems such as retaining lanes, high cost of digging lanes, immature coal pillar recovery technology, waste of coal resources, etc. Achieve the effect of reducing the amount of roadway excavation engineering and maintenance, and improving the recovery rate of coal resources

Inactive Publication Date: 2007-09-12
LANG FANG JING LONG GRAND IND MACHINERY CO LTD
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AI Technical Summary

Problems solved by technology

[0002] In my country's coal mines, the coal pillar recovery technology is not mature enough, and most mines use the coal pillar mining method for coal mining, which will inevitably result in a low resource recovery rate and a serious waste of coal resources.
At present, the method of section coal pillar-free roadway protection (gob-side retaining and gob-side driving) is popularized and used in some mines. Coal method is difficult to popularize

Method used

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  • Underground no pillar recovery method of coal mine

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specific Embodiment approach

[0017] As shown in FIG. 1 , a roadway layout diagram of a method for recovering coal pillars in an underground coal mine according to the present invention. Ventilation boreholes are arranged along the edge of goaf 1, which can avoid and weaken the influence of fixed support pressure, and replace goaf retention and gob entry. These include the following processes:

[0018] 1. Set coal pillars: In order to avoid the influence of large support pressure in the track level entry in the lower section, section coal pillars 3 should be reserved. Since the reserved section coal pillars will eventually be recycled, in order to facilitate roadway maintenance, coal The column size can be as large as 25-30m;

[0019] 2. Drilling along the goaf: 1 to 3 circular holes with a diameter of 1000mm are constructed at the tail of the working face along the goaf edge of the mined working face as return air holes of the mining face. This method utilizes the edge pressure of the goaf For smaller f...

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Abstract

The invention provides a pack recovery method without coal wedge. It contains the following technologies: set up coal wedge, drilling along and vertical space, stoping coal wedge, ventilation system, engaging measure, safe and transport measure. Construct and drill round hole along the gob brim of picked working face on afterbody of working face and drill holes along the roof by drilling along space. 1-3 round holes are taken as circulating holes of stoping working face. Drilling vertical space drills holes connecting with drilling along space in track tunnel. The number of holes is same as that of drilling along space. The invention arranges ventilating holes along the gob brim, which can avoid and weaken the influence of fixed stay pressure, replace remaining and digging tunnels along space and improve the recovery rate of coal resource. It reduces quantities and maintenance of tunnel driving. The drilling along space is safe, highly active and has low-loss.

Description

technical field [0001] The invention belongs to the underground coal mining technology of coal mines, in particular to an underground coal pillar recovery method without coal pillars. Background technique [0002] In my country's coal mines, the coal pillar recovery technology is not mature enough, and most mines use the coal pillar mining method for coal mining, which will inevitably result in a low resource recovery rate and a serious waste of coal resources. At present, the method of section coal pillar-free roadway protection (gob-side retaining and gob-side driving) is popularized and used in some mines. The coal method is difficult to popularize widely. Contents of the invention [0003] The present invention studies the problems existing in the above-mentioned existing coal mining technology without coal pillars, and its purpose is to provide a method for recovering coal resources without coal pillars in underground coal mines with high speed of excavation, safety ...

Claims

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Application Information

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IPC IPC(8): E21C41/16E21F1/00
Inventor 闫振东
Owner LANG FANG JING LONG GRAND IND MACHINERY CO LTD
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