Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Shield support for thick coal layer

A technology for shielding brackets and top coal caving, which is applied to mine roof brackets, mining equipment, earthwork drilling, etc., and can solve problems such as reduced bearing capacity of brackets, unusability, and small height of cut coal

Inactive Publication Date: 2004-08-25
萨尔州工业与矿山技术股份有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem here is that one such specialized support can only be used for this type of support, and especially when mining thickness changes are either severely affected or not used at all.
The disadvantages of the known so-called top-coal caving supports are that the height of the cut coal is relatively small, and that the load-bearing capacity of the support is reduced due to the use of the top beam

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Shield support for thick coal layer
  • Shield support for thick coal layer
  • Shield support for thick coal layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] exist figure 1 A screen bracket is shown in , which is called a composite screen bracket. This shield bracket 1 is similar to the usual form, has a solid base 2, a shield beam 3 hingedly connected to the base 2 by a four-bar linkage mechanism 4 and a top beam 5, which passes through hydraulic columns 6, 7 between the top plate 11 and the bottom plate 12 Tighten, the hydraulic column 6,7 is then supported on the support base 2. FIG. 2 a shows the situation of two hydraulic columns 6 , 7 .

[0020] The special structure of the cover support 1 enables the opening space 9 in the direction of the coal wall 10 to be maintained, and the cover beam 3 ensures that the cover support stops the falling gravel under the action of the limit jack 8 .

[0021] The coal seam 13 depicted here is at least partially mined by a shearer 38 at which time the coal is then removed by a longwall face conveyor 37 .

[0022] despite figure 1The shield 1 shown is referred to as a conventional s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The shield support featuring a lemniscate gear (4), a fractional shield (3) with ground slide (2) and a cover shield (5) as well as hydraulic stands (6, 7) be it like a withdrawal shield or classical shield for cutting extraction is used in cases when between the frontal moving cover shield (20) and the fractional shield (3) there is a short cover (22) inserted featuring a knuckle arrangement (23, 24) where the short cover (22) as well as the fractional shield (3) have its bed (17, 25) for the hydraulic stands (6, 7). The version featuring the short cover (22) is a classical shield, while the other without is a withdrawal shield. Both versions feature large supporting forces of the supporting assembly and a preferably large driving width between the hydraulic stands (6, 7) and the fractional shield (3).

Description

technical field [0001] The present invention relates to a shield bracket for top-coal caving used in mining thick coal seams. The bracket has a four-bar linkage mechanism, a shield beam, a base and a top beam, and a hydraulic column and a limit jack for ensuring the opening space facing the coal wall. For top-coal caving, the top beam tip can be tilted about a hinge by a top-coal caving jack. Background technique [0002] The cover support is a semi-closed support unit for the longwall working face used to ensure the space to the coal wall and the working face conveyor. The top beam and the base are separated by the hydraulic column, and pressure is applied to the top and bottom plates, at this time the top beam and the cover beam are operated by a four-bar linkage. This four-bar linkage causes the top beam tip to move approximately perpendicular to the bedding when the column is lowered. People are already familiar with a variety of shield supports, wherein for thick coal...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): E21D23/03
CPCE21D23/03
Inventor K·弗斯特
Owner 萨尔州工业与矿山技术股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com