Method for tunneling coal bed repeated mining roadway in goaf

A technology for gobs and roadways, applied in tunnels, tunnel linings, mining equipment, etc., can solve the problems of affecting the economic benefits of re-mining, affecting the speed of excavation, and the difficulty of support, so as to shorten the time of excavation and improve coal recovery High efficiency, stability and reliability

Inactive Publication Date: 2016-06-08
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When blasting and excavating the roadway, the roof and the two sides are easily broken, and the support is difficult. If the roof of the excavat

Method used

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  • Method for tunneling coal bed repeated mining roadway in goaf
  • Method for tunneling coal bed repeated mining roadway in goaf
  • Method for tunneling coal bed repeated mining roadway in goaf

Examples

Experimental program
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Embodiment 1

[0081] The basic situation of Taiping Coal Mine re-mining area is as follows:

[0082] From November 1998 to November 2000, a total of 792,000 tons of raw coal were mined at the 6301 working face;

[0083] From October 2001 to September 2002, a total of 882,000 tons of raw coal were mined at the 6303 working face;

[0084] From March 2000 to May 2002, a total of 675,000 tons of raw coal were mined at the 6305 working face;

[0085] From February 2001 to September 2001, a total of 469,000 tons of raw coal were mined at the 6307 working face.

[0086] By calculation, the remaining recoverable reserves in the re-production area are about 1.071 million tons.

[0087] The lower tunnel roadway of 303 in the re-mining area is within the scope of the original 6305 working face. The thickness of the remaining coal seam discarded in the goaf after mining in the 6305 working face is 0-5m, with an average of 3m. It is a stable coal seam with a simple structure and a hardness coefficien...

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Abstract

The invention discloses a method for tunneling a coal bed repeated mining roadway in a goaf. The method is characterized in that on the basis of performing roadway roof support by adopting steel sheds, the steel sheds, a pre-drilling beam and a pre-drilling steel chisel are organically combined for realization; in the tunneling process, a roadway roof is subjected to advance support; in the construction process, the pre-drilling steel chisel is matched with the hanging type pre-drilling beam to perform temporary roof support. According to the method disclosed by the invention, the technical difficulty of the effective roadway roof support when the repeated mining roadway in the goaf is tunneled and blasted is solved; the integrity of the tunneling working surface roof is ensured, the rapidity and the safety of coal bed repeated mining roadway tunneling in the goaf are realized, and the tunneling cost of the repeated mining roadway is reduced. A combined tool used in the invention is simple in structure, simple and convenient to disassemble and assemble, easy to process and manufacture and good in practicability. The method disclosed by the invention has the advantages of being low in running cost, good in safety and good in market promotion and application prospect.

Description

technical field [0001] The invention relates to a roadway excavation and support method, in particular to a coal seam recovery roadway excavation method in a coal mine goaf, belonging to the technical field of coal mining. Background technique [0002] For a long time, there have been low recovery rates and serious waste in the mining of coal resources in my country. The reason is that in the early stage of mine mining, a large amount of coal resources were lost in the goaf due to backward coal mining technology and poor management. [0003] Under the situation that coal, a non-renewable resource, is decreasing day by day, it is imperative to recover the remaining coal resources in gobs. The re-mining of gobs is one of the important ways to improve the recovery rate of coal resources, and it has far-reaching practical significance for prolonging the service life of mines. [0004] Residual coal resources in goafs often have great differences in form, poor storage condition...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D11/14E21D20/00E21D17/06E21D19/06
CPCE21D9/006E21D11/14E21D17/06E21D19/00E21D20/00
Inventor 郭忠平王凯段会强张晓飞牟文强王玉成
Owner SHANDONG UNIV OF SCI & TECH
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