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Coal mining process including prop type mining and prop recovery

A coal pillar and pillar-type technology, which is applied in the field of coal mining technology, can solve the problems of waste of resources and low coal recovery rate, and achieve the effects of less investment, less technical work and high safety factor.

Inactive Publication Date: 2009-06-10
段连权
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to various reasons such as mining technology and capital investment, the room type coal mining method is currently used, resulting in a serious waste of resources and a very low coal recovery rate (32%-38%). In order to save national resource waste and turn waste into treasure, Beneficial to the country and the people, the coal mining technology of pillar mining and recovery of coal pillars is specially invented

Method used

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  • Coal mining process including prop type mining and prop recovery
  • Coal mining process including prop type mining and prop recovery
  • Coal mining process including prop type mining and prop recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: The geological situation of the coal mine is as follows: the average thickness of the coal seam is 8 meters, and the mining height is 3.2 meters; the horizontal coal seam; low gas; the direct roof is sandy mudstone, sandy shale; no false roof and old roof; no water spray.

[0033] The coal mining process of pillar mining recovery coal pillar includes the following steps:

[0034] (1), hit the bolt; (2), hit the pillar; (3), drop the coal; (4), hit the bolt again; (5), load the coal, transport the coal; (6), return the pillar, put the roof Coal and coal pillars; of which

[0035] (1), bolting: at first hit the bolt on the roof in the roadway that has been mined; the bolting is manual bolting. The distance between rows and columns between every two anchors is 2.0m, the length of the anchors is 1.5m, and the diameter of the anchors is 0.16m.

[0036] (2), hit the pillars: hit the pillars in the middle of the roadway after the bolt is hit; the pillars are th...

Embodiment 2

[0041] Embodiment 2: Geological overview of the coal mine: the average thickness of the coal seam is 2.2 meters, and the mining height is 2.2 meters; the horizontal coal seam; low gas; the direct roof is hard sandstone, sandy shale; no false roof; no water spray.

[0042] The coal mining process of pillar mining recovery coal pillar includes the following steps:

[0043] (1), hit the bolt; (2), hit the pillar; (3), drop the coal; (4), hit the bolt again; (5), load the coal, transport the coal; (6), return the pillar, put the roof and broken coal pillars;

[0044] (1) Bolting: firstly hit the bolt on the roof of the roadway that has been mined; hit the bolt for the bolter to hit the bolt. The distance between rows and columns between every two bolts is 1.0m, the length of the bolt is 2.2m, and the diameter of the bolt is 0.18m.

[0045] (2) Playing pillars: Playing pillars in the middle of the roadway after bolting; playing pillars is metal friction pillars. The distance bet...

Embodiment 3

[0050] Embodiment 3: Coal mine geology general situation: average thickness of coal seam is 4.2 meters, mining height is 3.8 meters; horizontal coal seam; low gas; direct roof is sandy mudstone, sandy shale; there is old roof; no watering.

[0051] The coal mining process of pillar mining recovery coal pillar includes the following steps:

[0052] (1), bolting; (2), pillars; (3), falling coal; (4), bolting again; (5), coal loading, coal transportation; (6) back column, caving and broken coal pillar;

[0053](1) Bolting: firstly hit the bolt on the roof of the roadway that has been mined; hit the bolt for the bolter to hit the bolt. The distance between rows and columns between every two anchors is 1.5m, the length of the anchors is 1.8m, and the diameter of the anchors is 0.16m.

[0054] (2), hit the pillars: hit the pillars in the middle of the roadway after the bolt is hit; the pillars are the wooden pillars. The diameter of the wooden pillar is 0.12m, and the distance be...

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Abstract

The present invention discloses one coal mining process includes the following steps: mounting rock bolt; mounting pit prop; coal falling; re-mounting rock bolt; filling coal and transporting coal; and prop pulling, caving roof and breaking coal pillar. The coal mining process has the advantages of production safety, being reasonable and economic, high coal recovery rate, etc.

Description

Technical field: [0001] The invention relates to a coal mining technology, in particular to a coal mining technology for pillar mining and recovery of coal pillars. Background technique: [0002] Yulin, Ordos and other areas are rich in underground coal resource reserves, and the coal seam occurrence conditions are superior, shallow burial, monocline structure, dip angle 1-3 degrees, wide and gentle undulations, faults and folds in the area are not developed, and it is a simple structural area. The coal seam is stable, the coal quality is good, the gas content is low, and the water inflow is small. However, due to various reasons such as mining technology and capital investment, the room type coal mining method is currently used, resulting in a serious waste of resources and a very low coal recovery rate (32%-38%). In order to save national resource waste and turn waste into treasure, Beneficial to the country and the people, the coal mining technology of column type mining...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18E21D15/00E21D15/60E21D20/00
Inventor 段连权
Owner 段连权
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