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A mining method with strip coal pillars left

A technology of strip coal pillar and mining method, which is applied in the directions of surface mining, earthwork drilling, underground mining, etc., can solve the problems of low recovery rate of coal resources, shortage of coal resources, waste of coal resources, etc. The effect of improving recovery rate and easing supply shortage

Active Publication Date: 2016-02-17
SHANDONG UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

Strip mining needs to leave a certain width of protective coal pillars to support the overlying strata, which causes a large amount of coal resources to be sluggish, and the recovery rate of coal resources is low, making the problem of shortage of coal resources more prominent
The buildings (structures) on the surface will exist for a long time or even permanently, which will make the remaining coal resources sluggish after strip mining, resulting in a waste of precious limited coal resources

Method used

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  • A mining method with strip coal pillars left
  • A mining method with strip coal pillars left
  • A mining method with strip coal pillars left

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Embodiment Construction

[0015] The present invention adopts the method of mining and filling the middle of the protected coal pillar first, and then mining on both sides. The specific steps are as follows:

[0016] 1. If figure 1 As shown, a protective coal pillar 21 is left after strip coal pillar mining, and goafs 11 and 12 are located on both sides of the protective coal pillar respectively.

[0017] A small strip working face is arranged in the middle of the protective coal pillar 21 left after strip coal pillar mining for mining, and the reserved protective coal pillar 21 is partially recovered first;

[0018] 2. If figure 2 As shown, a small strip working face is mined in the middle of the reserved protective coal pillar 21, and the mined-out area after the mining of the small strip working face is filled with a filling body 3, and the remaining small strip coal pillars 22 and twenty three. The filling body is made of paste material, and then pushed back. In the advancing project of the wo...

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Abstract

The invention discloses a mining method of settled strip coal pillars. A mode of firstly mining and filling the middles of the settled strip coal pillars and then mining two sides is adopted. The concrete steps are divided into four steps, so as to achieve the target of recovering all the coal pillars. The mining method is simple and feasible to implement; the settled protective coal pillars after strip mining are completely recovered; the recovery rate of resources is improved. By adopting the mining method, the stability of an overlying rock can be ensured; meanwhile, the recovery rate of the resources is improved. Compared with the prior art, a lot of idle coal resources are liberated; the length of service of a mine is prolonged; the situation of short supply of the coal resources is also relieved.

Description

technical field [0001] The invention relates to a mining method of coal pillars, in particular to a mining method of leaving striped coal pillars, and belongs to the technical field of mining engineering. Background technique [0002] At present, the main technical method for mining coal resources covered by buildings (structures) in our country is to use strip mining. Strip mining needs to leave a certain width of protective coal pillars to support the overlying strata, which causes a large amount of coal resources to be sluggish, and the recovery rate of coal resources is low, making the problem of coal resource shortage more prominent. The buildings (structures) on the surface will exist for a long time or even permanently, which makes the remaining coal resources behind the strip mining sluggish, resulting in the waste of valuable limited coal resources. Contents of the invention [0003] In order to solve the above problems, the present invention provides a mining me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18
Inventor 张文泉李伟张红日阎莎莎刘海林孔令珍王修利
Owner SHANDONG UNIV OF SCI & TECH
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