Method for grouting, filling and compacting goaf filling body from roof roadway

A goaf and backfill technology, which is applied to backfills, mining equipment, earthwork drilling, etc., can solve problems such as the inability to achieve the expected effect of surface subsidence control, the transfer of subsidence space to the surface, and the inadequacy of backfill compaction. , to achieve the effect of simple and flexible implementation, small impact on ground production activities, and low cost

Active Publication Date: 2014-01-08
CHINA UNIV OF MINING & TECH
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Problems solved by technology

Because goaf filling is sometimes affected by complex geological conditions or due to inadequate management and construction and many other factors, there may be problems such as filling not being connected to the top, or filling compaction not in place, and part of the subsidence space will be transferred to the surface, etc. Phenomenon, resulting in the failure of surface subsidence control to achieve the expected effect

Method used

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  • Method for grouting, filling and compacting goaf filling body from roof roadway
  • Method for grouting, filling and compacting goaf filling body from roof roadway
  • Method for grouting, filling and compacting goaf filling body from roof roadway

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Embodiment Construction

[0021] Embodiments of the present invention will be further described below in conjunction with accompanying drawings:

[0022] Such as figure 1 with figure 2 As mentioned above, a working face support 9 is provided on the coal mining face 1, and the gangue filling body 2 is filled in the goaf in the roadway behind the coal mining face 1, and the upper and lower grooves 6 and 2 are respectively left on both sides of the coal mining face 1. Down slot 7;

[0023] A method for filling a compacted goaf filling body by grouting from a roof roadway, comprising the following steps:

[0024] a. For every excavation distance L meters of the coal mining face, a group of grouting boreholes 4 are arranged in the goaf in the roof roadway 3 consistent with the coal mining face, and the coal mining face excavation distance L=h / tanψ, In the formula, h is the distance between the roof roadway 3 and the coal seam, and ψ is the full mining angle of the strike. Each group of grouting borehol...

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Abstract

A method for grouting, filling and compacting a goaf filling body from a roof roadway is suitable for being used in a waste filling goaf mine. The method comprises the steps that every time a coal face is tunneled for L meters, a set of grouting drill holes (4) is formed in a goaf in the roof roadway (3) in the direction consistent with that of the coal face, the height of a diversion fissure zone hl is calculated according to the equivalent mining height hd of the filled goaf, and component drilled holes are filled. The method has the advantages of being easy and flexible to implement, small in interference on the prior art, low in cost and good in subsidence reduction effect, and meanwhile compared with ground grouting, the method has small influence on ground production activities, and is suitable for being implemented in the areas with dense buildings.

Description

technical field [0001] The invention relates to a method for filling a goaf filling body, in particular to a method for filling and compacting a goaf filling body through grouting from a roof roadway, which is suitable for filling a goaf mine with gangue. Background technique [0002] Coal mining under buildings has always been a major problem plaguing my country's coal mining enterprises, especially coal mining under villages. With the gradual depletion of resources in some mining areas, the problem of coal pressing in villages has become more and more prominent; especially in areas with relatively developed economies, due to the shortage of land resources and the increase in relocation costs, it is imperative to press coal without relocating mining buildings. The successful mining of compressed coal under buildings, especially stretches of villages, is of great significance to improving the utilization rate of coal resources and alleviating the tension of mine resources. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/06
Inventor 许家林刘康轩大洋
Owner CHINA UNIV OF MINING & TECH
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