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Coal mine rock stratum mobile control mining-filling-preserving coupled coordination mining method

A mining method and coal mine technology, which is applied in ground mining, earth square drilling, underground mining, etc., can solve problems such as easy water accumulation, difficult relocation measures, and large amount of coal pressure, so as to reduce surface movement deformation and improve surrounding rock condition, the effect of improving the stress state

Active Publication Date: 2013-12-11
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] To sum up, it is difficult to implement relocation measures, and underground mining of buildings (structures) that are prone to water accumulation after surface subsidence, a large amount of coal pressure, and widely distributed; it is necessary to seek a method that can reduce subsidence and surface deformation, Mining measures to protect the safe use of surface buildings (structures), ensure the resource recovery rate, and save costs

Method used

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  • Coal mine rock stratum mobile control mining-filling-preserving coupled coordination mining method
  • Coal mine rock stratum mobile control mining-filling-preserving coupled coordination mining method
  • Coal mine rock stratum mobile control mining-filling-preserving coupled coordination mining method

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Experimental program
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Effect test

Embodiment 1

[0038] Such as Figure 1a and Figure 1a ’, the coal mine mining area 1 is divided into m mining units, where m is a positive integer; each mining unit adopts one-sided filling Mining in single-side filling mode is to arrange a filling working face and a non-filling working face in sequence on the side of the reserved coal pillar MZ; firstly, the filling working face mining is carried out in the filling method mining unit area of ​​the N mining unit n and filling to form a filling body CTT; and then carry out non-filling working face mining in all caving mining unit areas of the N mining unit n to form a goaf CKQ, where n is a positive integer and m is less than or equal to n; two adjacent The coal pillar MZ of a mining unit is adjacent to the goaf CKQ. With the reserved coal pillar MZ as the core, the coal pillar MZ, filling body CTT and caving body coordinately support the overlying rock mass, and control the movement and deformation values ​​of the rock formation and the su...

Embodiment 2

[0040] Such as Figure 1b and Figure 1b ' shows that the "mining-filling-retention" coupling coordinated mining method of the coal mine stratum movement control in this embodiment divides the coal mine mining area 1 into m mining units, where m is a positive integer; each mining unit adopts a double-sided filling mode For mining, the double-sided filling mode is to arrange a filling working face and a non-filling working face in sequence on the side where the coal pillar MZ is reserved, and another non-filling working face is arranged on the other side of the reserved coal pillar MZ; In the filling method mining unit area of ​​the Nth mining unit n, the filling face mining is carried out and filled to form a filling body CTT; In goaf CKQ, n is a positive integer and m is less than or equal to n; two adjacent mining units use filling body CTT to be adjacent to goaf CKQ.

Embodiment 3

[0042] Such as Figure 1c As shown, the "mining-filling-retention" coupling coordinated mining method of the coal mine stratum movement control in this embodiment divides the coal mine mining area 1 into m mining units, where m is a positive integer; in the entire coal mine mining area 1, a part of mining The coal pillar MZ of the unit has a filling body CTT only on one side, and the coal pillar MZ of the other part of the mining unit has a filling body CTT on both sides; two adjacent mining units use the filling body CTT to be adjacent to the goaf CKQ or use The coal pillar MZ is adjacent to the goaf CKQ. Firstly, in the filling method mining unit area of ​​the N mining unit n, the filling working face mining is carried out and filling is formed to form a filling body CTT; then, the non-filling working face mining is carried out in all the caving method mining unit areas of the N mining unit n, To form the goaf CKQ, n is a positive integer and m is less than or equal to n. ...

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Abstract

The invention discloses a coal mine rock stratum mobile control mining-filling-preserving coupled coordination mining method. Coal pillar preserving-partial filling-partial mining coordination filling mining is implemented, preserved coal pillars are treated as a core, and the preserved coal pillars, a filler and a caving body coordinatively support upside rock to control the mobile deformation value of the rock stratum and the ground surface. A one-side filling mode is characterized in that filling work surfaces and non-filling work surfaces are sequentially arranged at one side of the preserved coal pillars; and a two-side filling mode is characterized in that the filling work surfaces and the non-filling work surfaces are sequentially arranged at two sides of the preserved coal pillars. The filling work surfaces are first mined and then the non-filling work surfaces are recovered, or the filling mining and recovery are simultaneously carried out. The widths of the preserved coal pillars satisfy basic stable requirements; and the widths of the filling work surfaces and the non-filling work surfaces are determined according to extremely-incomplete mining requirements. Compared with strip mining, the method has the advantages of improved coal pillar stress state and increased mining rate because of the coal pillar side filling. Compared with complete mining-complete filling, the method has the advantages of reduced filling amount, enhanced support strengths of the filling body and the coal pillars, improved rock stratum control effect and cost saving.

Description

technical field [0001] The invention relates to a coal seam mining method, in particular to a "mining-charging-retaining" coupling coordinated mining method of coal mine rock layer movement control. technical background [0002] Mining will inevitably cause surface subsidence and deformation. In areas with a high phreatic level, if coal resources are recovered by conventional mining methods, a large amount of water will accumulate in the subsidence basin formed on the surface. If the building or structure is located in the subsidence basin, it will cause long-term water accumulation or excessive humidity in the building or structure. Affect normal use; when the surface deformation is large, it will also cause damage to buildings or structures. Therefore, when there are many surface buildings (structures) and a large amount of coal pressure, at present, the surface buildings (structures) are generally relocated from other places, or underground filling mining and strip minin...

Claims

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Application Information

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IPC IPC(8): E21C41/16
Inventor 戴华阳
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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