Roadway support method for fully mechanized caving mining of weak extra-thick coal seam

A technology of extra-thick coal seam and mining roadway, applied in mining equipment, earthwork drilling, installation of bolts, etc., can solve problems such as lack, and achieve the effects of reliable quality, good safety and reasonable parameters

Active Publication Date: 2012-10-17
DATONG COAL MINE GRP
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Problems solved by technology

[0003] In order to solve the problem that there is still a lack of a particularly reasonable and optimized support method for roadway support in weak and ext

Method used

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  • Roadway support method for fully mechanized caving mining of weak extra-thick coal seam
  • Roadway support method for fully mechanized caving mining of weak extra-thick coal seam
  • Roadway support method for fully mechanized caving mining of weak extra-thick coal seam

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Embodiment Construction

[0011] The method for supporting a roadway in fully mechanized caving back mining in soft and extra-thick coal seams comprises the following steps: fixing a plurality of rows of high-strength metal thick-tail yielding bolts 1 evenly distributed on the roof of the roadway, and every two rows of high-strength metal thick-tailed yielding bolts 1 The distance between them is 1200mm, and there are four high-strength metal thick tail pressure anchor rods 1 in each row, and the distance between every two high-strength metal thick tail pressure anchor rods 1 is 1000mm, and each row of high-strength metal thick tail pressure anchor rods 1 A W-shaped four-eye steel strip 2 is fixed at the lower end of the anchor rod 1. The length of the W-shaped four-eye steel strip 2 is 3200mm, the width is 150mm, and the thickness is 3mm. There is a metal mesh 4 fixed in between, the length of the metal mesh 4 is 3400mm, and the width is 2000mm; the top plate is fixed with several rows of anchor cables...

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Abstract

The invention provides a roadway support method for fully mechanized caving mining of weak extra-thick coal seam, solving the problem of lacking a particularly rational and optimized support method for the weak extra-thick coal seam roadway support. The roadway support method for fully mechanized caving mining of weak extra-thick coal seam adopts a high strength prestressed metal thick tail to provide a combined support by a pressure anchor, a W shaped steel belt, a metal mesh and an anchor. The method of the invention has good support effects and reasonable parameters. The method has the advantages of low support cost, good support effects, reliable quality, good adaptability, good security and the like, and is especially applicable to the weak extra-thick coal seam roadway support.

Description

technical field [0001] The invention relates to a roadway support method in coal mines, in particular to a roadway support method for fully mechanized caving back mining in soft and extra-thick coal seams. Background technique [0002] my country's thick coal seam resources are very rich, and the recoverable reserves account for more than 45% of the total production mines, of which the ultra-thick coal seams above 8m also account for a considerable proportion. Fully mechanized caving mining technology transforms the reserve advantages of thick coal seams into economic advantages with its five characteristics of good technology, less investment, less consumption, high efficiency and good safety. One of the main technical approaches. Fully mechanized caving mining is comprehensive mechanized top-coal caving mining. The mining roadway of the working face is generally excavated along the floor of the coal seam. Since the roof and two sides of the roadway are coal bodies, the ma...

Claims

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Application Information

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IPC IPC(8): E21D21/00
Inventor 李先章吕家忠范世兴杨智文王清薛厚韩焕生王孝宾匡铁军马来斌
Owner DATONG COAL MINE GRP
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