Forward coal mining by filling method

A forward-type, filling slurry technology, which is applied in the direction of filling materials, ground mining, mining equipment, etc., can solve the problems of air leakage in gobs, long preparation time of coal mining face, waste of coal resources, etc., and achieve the effect of avoiding waste

Inactive Publication Date: 2010-06-23
ZIBO WANGZHUANG COAL MINE
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AI Technical Summary

Problems solved by technology

[0011] The invention provides a forward coal mining technology of filling method, which can solve difficult problems such as long preparation time of coal mining face, high pressure of surrounding rock in gob-side retaining roadway, air leakage in goaf, waste of coal resources, etc. The rate is more than 95%, which can effectively control the surface settlement and achieve no disturbance on the surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] Embodiment: Downhole filling coal mining industrial test

[0024] 1. Basic situation of 14601 filling coal mining face

[0025] The coal seam mined in the working face is coal 6, the thickness of the coal seam is 0.6-0.7m, the inclination angle of the coal seam is 12-15°, and the mining height is 2 meters. The length of the working face is 60m, and the length of the working face is 72m.

[0026] 2. Basic steps:

[0027] (1) Excavate 5m along the upper and lower troughs to form a cut hole. Lay a SJB420 / 30 scraper conveyor on the upper trough to transport coal and return air; lay railways along the lower trough to transport materials and air intake.

[0028] (2) Labor organization: Two production shifts excavate while mining, and one production shift fills the goaf.

[0029] Steps for coal mining while driving in two production shifts:

[0030] ① Simultaneously advance the coal mining face and the lower trough. The coal is transported away by the scraper conveyor of ...

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PUM

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Abstract

The invention provides a forward coal mining technique by a filling method, comprising the following characteristics: simultaneously pushing the working surface and the gate road of coal mining, thereby tunneling, mining and filling old empty region. The invention can reduce 20-30% of tunneling rate and 10-15% of workers, the filling ratio of the goaf reaches over 95%. The problems that the maintenance is difficult to carry out because of great pressure of the surrounding rock along retaining, the goaf leaks air, the production is continuously tense, coal resource is wasted and the like are solved, and the non-disturbance of earth surface is effectively controlled.

Description

technical field [0001] The invention belongs to a filling method advancing coal mining technology. Background technique [0002] my country is rich in coal resources, the reserves rank among the top in the world, and large and small coal fields are spread all over the country. Coal mining has a long history and there are many methods, mainly the following coal mining methods. [0003] According to the treatment of gobs, there are mainly the following two coal mining methods: [0004] 1. Caving coal mining method: the goaf collapses as the coal mining face advances. This coal mining method has a low resource recovery rate due to the collapse of the goaf, resulting in surface subsidence, damage to surface building facilities, water bodies, and ecological environment. [0005] 2. Filling coal mining method: the goaf is filled with the advancement of the coal mining face. This coal mining method controls the surface subsidence due to the filling of the goaf. However, the cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16E21F13/00E21F15/00
Inventor 石建新
Owner ZIBO WANGZHUANG COAL MINE
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