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Three-down coal mining method for concentrated filling roadway in near-horizontal extra-thick coal seam and step-by-step mining

A technology of extra-thick coal seam and thick coal seam, which is applied in the field of three-down coal mining, can solve the problems of top-coal caving mining filling difficulties, unsuitability for three-down mining, and difficulty in mining connection, so as to improve mining efficiency and economic benefits, and save mining Cost, the effect of improving mining efficiency

Active Publication Date: 2021-03-30
山东威斯特矿山工程科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the mining of advanced horizontal coal seams, there are mainly three main mining techniques for extra-thick coal seams: one-time full-height mining with large mining height, top-coal caving mining, and layered mining, but one-time full-height mining has high requirements on geological conditions and is not suitable for three-down Mining; top-coal mining and filling are difficult, and the recovery efficiency is low; in addition, using the existing mining method for filling in layered mining will lead to low mining efficiency, and the roadway layout of the filling system makes mining connection difficult

Method used

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  • Three-down coal mining method for concentrated filling roadway in near-horizontal extra-thick coal seam and step-by-step mining
  • Three-down coal mining method for concentrated filling roadway in near-horizontal extra-thick coal seam and step-by-step mining
  • Three-down coal mining method for concentrated filling roadway in near-horizontal extra-thick coal seam and step-by-step mining

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Three-lowering coal-cutting law, a layering of the collision of the thick coal seam concentration, such as Figure 1 to 6 As shown, the thick coal seam is divided into multiple mining layers, and the specific steps include:

[0032] Step A. Concentrate along the coal grade top plate 1, arrange the transport order of transport along the coal seam floor, and cut the eye 3 in the working surface boundary of 5 to 7 °. Specifically, it is cut from the transport ordering groove 2, and the length of the open eye 3 is specifically determined according to the filling capacity of the lane-filled device.

[0033] Step B. By setting the concentrated filling lane 4 and the filling chamber 5 and the concentrated filling alley 1, wherein the inclination angle of the filled lane 4 is 50 to 60 °, using the inclination angle to achieve the self-slip material, and can be divided The layered filling service of the laminated layer is formed, forming a transport tank 2-cutting 3-concentrated fill...

Embodiment 2

[0040]In order to further illustrate the beneficial effects of the coal mining method, solve a further description of this method, a mining has a near level coal seam, its thickness is 24 meters, the mine design capacity is 10 million tons / year, and the coal gangue is 2 million. / Year, industrial squares and government development zones 50 million tons, which effectively solved the problem of coal gangue after using this method. At the same time, the coal gangue is still recycled, and the coal is 18 million tons / year, which has both social benefits and economic benefits.

[0041] The mining process of the mine specifically, a 24-meter-thick coal seam is specifically divided into 5 mining layers, and the bottom-up is sequentially C1, C2, C3, C4 and C5, and each mining layer has a thickness of less than 5 meters. After dividing the boundaries of the work surface, its mining steps include:

[0042] Step A. Centralize the roller along the top plate of the coal seam, arrange the t...

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Abstract

The invention provides a centralized filling roadway layering stepping mining and filling "three under" mining method for an approximately horizontal superhigh seam, and relates to the mining method technology field. The approximately horizontal superhigh seam is first divided into multiple mining layers, and the centralized filling roadway layering stepping mining and filling "three under" miningmethod for the approximately horizontal superhigh seam specially includes steps: A, arranging a centralized filling roadway along a coal seam roof, arranging a transport gate road along a coal seam floor, and opening a cutting hole at a dip angle of 5-7 degrees on a boundary of a working face; B, by arranging a centralized filling inclined roadway, a filling chamber and the centralized filling roadway in communicating mode, forming a transport gate road-cutting hole-centralized filling inclined roadway-filling chamber-centralized filling roadway air return system; C, alternately arranging a plurality of branch roadways Z and a plurality of coal pillars M at the lowest mining layer along the cutting hole, completing mining of the branch roadways Z first, and filling the branch roadways Z;D, mining the coal pillars M after completing filling of the roadways Z, and filling the coal pillar areas, a transport roadway and the transport gate road; E, repeating the steps from A to D, and completing mining of all the mining layers. The centralized filling roadway layering stepping mining and filling "three under" mining method for the approximately horizontal superhigh seam achieves filling and mining of the approximately horizontal superhigh seam, and is safe and efficient.

Description

Technical field [0001] The present invention relates to the technical field of coal mining methods, in particular, a three-lowering coal mining method with a concentrated filling alley in a near-horizontal thick coal seam wall system. Background technique [0002] Three mining refers to the mining of the deposit in the surface water, the building and the railway (highway). When exploiting such a deposit, according to the deposit conditions of the deposit, the corresponding restriation process technology is adopted; the purpose is to make the underground return Working on ground buildings, railway (highway) trunk lines are controlled within the allowable range, while preventing ground water from pouring into the well caused water. Filling mining method refers to the mining method of filling the filling, transporting and other homework, with a filling of the filling area, and the purpose of filling is to support the two rocks of the vacuum area, and to continue to carry out the abo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18E21F15/00
CPCE21C41/18E21F15/00
Inventor 赵大勇翟德元王茂桐汤建泉葛瑞行刘峰珍
Owner 山东威斯特矿山工程科技股份有限公司
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