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A kind of roadway excavation method of coal seam re-mining in goaf

A goaf and roadway technology, applied in tunnels, tunnel linings, mining equipment, etc., can solve the problems of affecting the economic benefits of re-mining, affecting the driving speed, and difficulty in supporting, so as to shorten the driving time and improve coal recovery. rate, stability and reliability

Inactive Publication Date: 2017-08-15
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 excavation working face is not well protected, it is easy to fall
Seriously affect the speed of excavation and affect the economic benefits of re-mining

Method used

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  • A kind of roadway excavation method of coal seam re-mining in goaf
  • A kind of roadway excavation method of coal seam re-mining in goaf
  • A kind of roadway excavation method of coal seam re-mining in goaf

Examples

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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 roadway excavation method for coal seam re-mining in the goaf. On the basis of the existing steel shed in the prior art for the roof support of the roadway, the steel shed, the front probe beam and the front probe steel drill are combined Organically combined to achieve: during the excavation process, advance support for the roof of the roadway; during the construction process, use the front probe steel braze and the hanging front probe beam for temporary support of the roof, which better solves the problem of goaf The technical problem of effectively supporting the roof of the roadway during the tunneling and blasting of the internal multiple mining roadway; it ensures the integrity of the roof of the excavation working face, realizes the rapidity and safety of the coal seam multiple mining roadway excavation in the goaf, and reduces the cost of multiple mining. The cost of driving the roadway. The combined tool used in the invention has simple structure, easy disassembly and assembly, easy processing and manufacture, and good practicability; the invention has low operating cost, good safety, and has good market promotion and application prospects.

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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Patent Type & Authority Patents(China)
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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