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

A Supporting Method for Pre-excavation Single Retraction Channel in Fully Mechanized Mining Face

A technology of retraction channel and fully mechanized mining face, which is applied in the field of pre-excavation single retraction channel support of coal mine fully mechanized mining face. The effect of economical cost reduction and speed improvement

Active Publication Date: 2021-02-09
HUAIHE ENERGY WESTERN COAL & ELECTRICITY GRP CO LTD +1
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the pre-excavation and withdrawal channels of fully mechanized mining face in my country mainly adopt stacked supports, but the use of stacked supports has the following problems: one is to increase the transportation volume of the auxiliary shaft; the other is that the stacked supports are heavy equipment, and there are crushing injuries during handling and installation It is a safety risk for people and others, and it needs to be dismantled after retraction, which affects the speed of relocation; third, it is necessary to dig a parallel auxiliary retraction channel; fourth, the price of stacking brackets is relatively high, and the one-time investment cost is large

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
  • A Supporting Method for Pre-excavation Single Retraction Channel in Fully Mechanized Mining Face
  • A Supporting Method for Pre-excavation Single Retraction Channel in Fully Mechanized Mining Face
  • A Supporting Method for Pre-excavation Single Retraction Channel in Fully Mechanized Mining Face

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] see figure 1 , figure 2 , image 3 and Figure 4 In this embodiment, the pre-excavation single-retraction channel support method of fully mechanized mining face is carried out according to the following steps:

[0027] Step 1. Before the working face 1 advances to 300m of the production stop line, complete the initial support of the withdrawal channel 2 as follows:

[0028] Set the cross-section of the retraction channel 2 as a rectangle, such as 4500mm×4300mm. During the excavation of the retraction channel 2, set up the joint support of the anchor cable net. The joint support of the anchor cable net includes: laying the metal mesh 4 on the surface of the roadway roof 3 (Such as figure 2 As shown), the roof anchor rods 5 are combined into rows by the horizontal roof steel strips 6a; on the roadway roof 3, a row of roof primary support anchor cables 7 is arranged every two rows of transverse roof steel strips 6a, and the roof primary support anchor cables 7 are co...

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 invention discloses a single-retraction channel support method for pre-excavation of a fully mechanized mining face. Between 100-300m, the reinforcement support is completed for the withdrawal channel that has completed the primary support, including the construction of anchor cable bundles with hollow grouted anchor cables; The hollow grouting anchor cable in the anchor cable bundle is grouted to realize the full-length anchorage of the anchor cable bundle and complete the support of the pre-excavation single withdrawal channel in the fully mechanized mining face. On the premise of ensuring the safe support of the withdrawal channel, the present invention realizes rapid moving and reverse.

Description

technical field [0001] The invention relates to a support method for a retraction channel in a coal mine, in particular to a method for supporting a pre-excavation single-retraction channel in a coal mine fully mechanized mining face. Background technique [0002] After the fully mechanized mining face is mined, it is necessary to transfer large equipment such as hydraulic supports to the next working face. This process is commonly known as "moving the working face". At present, there are usually two methods for withdrawing equipment on the working face: the existing excavation withdrawal channel and the pre-excavation withdrawal channel. The former operation space is unsafe, and the process is time-consuming and laborious. The average moving time is 1 to 2 months. The relocation technology of the pre-excavation withdrawal channel is to excavate a withdrawal channel parallel to the coal mining face in advance near the final mining line, that is, the pre-excavation withdrawal...

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
Patent Type & Authority Patents(China)
IPC IPC(8): E21D20/00E21D11/15E21D11/10E21D15/00
CPCE21D11/10E21D11/152E21D11/155E21D15/00E21D20/00
Inventor 疏义国杨张杰陈苗虎王庆牛钱立云李守好汪书祺王威朱祥斌陈康丁晶程雁斌杨永刚王福海王波余大军
Owner HUAIHE ENERGY WESTERN COAL & ELECTRICITY GRP CO LTD
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