Pre-excavation guide tunnel filling method for roadside support for secondary reuse of roadway with artificial side

A technology of roadside support and secondary reuse, which is applied in fillings, underground chambers, and earthwork drilling, etc., can solve the problems of large section shrinkage, difficult roadway maintenance, and slow coal mining speed, and achieve section shrinkage. Small, eliminates roadway instability, and has the effect of fast road formation

Active Publication Date: 2016-07-20
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0011] In order to overcome the shortcomings of difficult roadway maintenance, large section shrinkage, slow coal mining speed, poor support effect and air leakage in the goaf in the technology of roadway protection without coal pillars, the present invention provides a secondary recovery method for pre-excavation pilot tunnel filling with artificial sides. The method of forming a road with roadside support

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  • Pre-excavation guide tunnel filling method for roadside support for secondary reuse of roadway with artificial side
  • Pre-excavation guide tunnel filling method for roadside support for secondary reuse of roadway with artificial side
  • Pre-excavation guide tunnel filling method for roadside support for secondary reuse of roadway with artificial side

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[0044] The present invention will be described in further detail below with reference to the accompanying drawings.

[0045] Such as Figure 1-9 As shown, the pre-excavation guide tunnel of the present invention is filled with artificial side and the secondary reuse roadside support roadway forming method is:

[0046] The first step: excavation of the first working face and the lower mining roadway 5a, 5b

[0047] Step 1.1: Pre-excavation of mining roadway guide tunnel 1 under the first working face

[0048] Such as figure 1 and figure 2 As shown, before the excavation of the mining roadway 5b under the first working face, firstly, at the lower side of the mining roadway 5b under the first working face, excavate a 2m-wide mining roadway guide tunnel 1 under the first working face. The leading tunnel 1 of the mining roadway is equal to the height and length of the mining roadway 5b under the first working face, and temporary support is used; the temporary support is determ...

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Abstract

The invention discloses a method for supporting and forming a roadway by pre-excavating the guideway and filling the artificial side for secondary reuse. Firstly, the guideway is pre-excavated and filled to form the artificial side before the mining roadway is excavated, and then the mining is successively excavated along both sides of the artificial side. The roadway is filled with man-made gangs successively as the roadside support of the two mining roadways, serving the mining of the two working faces. Compared with the gob-side retaining technology in the existing coal pillar-free roadway protection technology, the mining roadway in the present invention collapses directly, requires no maintenance, and has a small section shrinkage rate. The same applies under the same conditions; the pre-excavation pilot tunnel is used for filling, and the two sides of the pilot tunnel are filled with solid coal, and the formwork on both sides is not used for filling, so the process is simple and the construction speed is fast.

Description

technical field [0001] The invention relates to the coal mine roadway protection technology without coal pillars. Background technique [0002] The coal pillar-free roadway protection technology is an important development direction of coal mining technology. It can not only reduce the waste of coal resources, improve the resource recovery rate, but also eliminate the stress concentration phenomenon caused by leaving coal pillars. Dynamic disasters such as coal and gas outbursts are very beneficial, and at the same time, they also play an important role in the sustainable development of mines and the realization of green mining. [0003] At present, there are two main types of coal pillar-free roadway protection technology: gob-side entry retention and gob-side entry entry. [0004] The so-called gob-side roadway retention technology refers to the use of support materials along the edge of the gob to maintain the original mining roadway during coal mining, and the original ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D11/00E21F15/00
Inventor 谭云亮刘学生宁建国
Owner SHANDONG UNIV OF SCI & TECH
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