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A filling mining method for fully mechanized top coal caving face

A fully mechanized roof caving and mining method technology, which is applied in the direction of filling, ground mining, mining equipment, etc., can solve the problems of large surface deformation, etc., and achieve the effects of increased density, strong stability, and enhanced filling and support effects

Active Publication Date: 2019-09-03
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems of roof control in fully mechanized top-coal caving working faces and large surface deformation in top-coal caving mining, the present invention provides a filling mining method applied to fully mechanized top-coal caving working faces. The specific technical scheme is as follows

Method used

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  • A filling mining method for fully mechanized top coal caving face
  • A filling mining method for fully mechanized top coal caving face
  • A filling mining method for fully mechanized top coal caving face

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 1 with image 3 As shown, a filling mining method applied to fully mechanized top coal caving face specific construction steps include:

[0035] Step A. When the fully-mechanized top-coal caving face is arranged in a hard coal seam with uniform thickness and there are no large faults in the face, divide the fully-mechanized top-coal caving face along the direction of the face into filling area 5 and top-caving Coal area 6. The length of the filling area 5 and the top-coal caving area 6 is equal to the length of the working face, the sum of the width of the filling area 5 and the top-coal caving area 6 is equal to the width of the working face, and the length and width of the top-coal caving area are guaranteed to be less than the initial pressure of the basic top-coal The step distance, where the filling area 5 and the top-coal caving area 6 are adjacent. The fully mechanized top-coal caving working face is divided into several filling areas 5 and top-...

Embodiment 2

[0047] On the basis of Example 1, combined with an engineering example, the filling mining method applied to the fully mechanized top coal caving face will be further explained. The underground elevation of the fully mechanized top coal caving face of a mine is -241.3m, and the main coal seam is the 3rd coal seam of the Shanxi Formation. The 3rd coal seam has a simple structure, no bifurcation phenomenon, and is thick and stable. The strike length of the working face is 700m, the inclination length is 150m, the average thickness of the coal seam is 8.5m, the inclination angle is 5-8°, and the bulk density is 1.38t / m 3 . The immediate roof is dark gray siltstone, generally 2-3m thick, relatively stable, with a compressive strength of 40.53-62.81MPa; the old roof is thick medium-grained sandstone, 10-30m thick, with a hard rock formation, and a compressive strength of 91.20-131.7MPa.

[0048] Step A. According to the above-mentioned stope geological conditions and surrounding r...

Embodiment 3

[0054] On the basis of Example 1, combined with an engineering example, the filling mining method applied to the fully mechanized top coal caving face will be further explained. In the fully mechanized top coal caving face of a mine, the strike length of the face is 800m, and the inclination length is 200m. The average thickness of the coal seam in the working face is 9m, which is a stable coal seam. The average inclination angle of the coal seam is 9°. The immediate roof is mudstone with an average thickness of 1.4m, and the average unidirectional compressive strength is 47.7MPa. The basic roof is fine sandstone with an average thickness of 3.0m and an average unidirectional compressive strength of 119.8MPa. The immediate bottom is mudstone with an average thickness of 2.4m, with an average unidirectional compressive strength of 47.7MPa, and the basic bottom is fine sandstone with an average thickness of 3.9m, with an average unidirectional compressive strength of 119.8MPa. ...

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Abstract

The invention provides a filling mining method applied to fully mechanized top-coal caving working faces, relates to the technical field of mining engineering, and solves the technical problems of roof control of fully mechanized top-coal caving working faces and large surface deformation in top-coal caving mining. The method includes: A. Divide the fully mechanized mining top-coal caving working face into filling area and top-coal caving area along the direction of the working face, or divide the working face into filling area and top-coal caving area along the direction and inclination; B. Determine the circulation of the working face Step distance; C. Support the filling area in front of the working face, and set up log support in the filling area after the top coal caving area is completed; D. After the filling area reaches the filling step distance, set up filling behind the hydraulic support Tarpaulin, pump filling paste; E. Repeat steps C and D to complete mining. This method proposes a mining method of alternate coal caving and filling, completes the filling mining of the top coal caving face, effectively controls the roof, reduces surface subsidence, and has the advantages of safety and high efficiency.

Description

technical field [0001] The invention relates to the technical field of mining engineering, in particular to a sub-regional coal caving and filling mining method for fully mechanized top coal caving working faces. Background technique [0002] At present, in fully mechanized top-coal caving mining, the roof of the goaf is treated by the caving method. The caving of the roof will cause surface subsidence, especially in the mining of thicker coal seams. Destruction of surface water. At the same time, the accumulation of a large amount of gangue produced by caving mining will cause environmental pollution. Filling mining is an effective method to solve the problem of surface subsidence, especially the gangue filling process can not only digest gangue but also effectively reduce surface subsidence. However, due to the top-coal caving in the process of fully mechanized mining and caving mining, and the appearance of mine pressure in the goaf is complicated, the space for filling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18E21F15/08
CPCE21C41/18E21F15/08E21F15/02
Inventor 陈绍杰杜兆文夏志国张振陈兵李志远简勇
Owner SHANDONG UNIV OF SCI & TECH
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