Hydraulic support and surrounding rock coupling three-dimensional dynamic design method

A hydraulic support, three-dimensional dynamic technology, applied in pillars/supports, mining equipment, earthwork drilling, etc., can solve the problems of support design pertinence, poor adaptability, etc., to improve adaptability, reduce failure rate, and improve reliability. Effect

Active Publication Date: 2011-01-05
CCTEG COAL MINING RES INST
View PDF4 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to address the deficiencies in the static structure design of the current support and the characteristics of the longwall working face with a large mining height, and propose a method that comprehensively considers the impact of the surrounding rock

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
  • Hydraulic support and surrounding rock coupling three-dimensional dynamic design method
  • Hydraulic support and surrounding rock coupling three-dimensional dynamic design method
  • Hydraulic support and surrounding rock coupling three-dimensional dynamic design method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] in accordance with figure 1 As shown in the hydraulic support surrounding rock coupling design process, in the discrete element analysis software, the large mining height fully mechanized caving mining support surrounding rock relationship coupling model is established. Simulate that as the working face advances, the surrounding rock gradually presents the top coal separation layer, the first top coal caving, the top coal secondary caving, the top coal caving three times, the direct top coal caving, the direct top coal caving, the direct top second The migration state of the roof (coal) such as secondary caving, and with the advancement of the working face, the various processes are cyclical and overlap each other, and jointly act on the support of the working face.

[0032] Among them, the geological characteristics and caving characteristics of the roof and top coal can be corrected and adjusted by inputting the coal seam geological conditions of a specific mining are...

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 three-dimensional design method of a hydraulic support, which considers the dynamic effect of surrounding rocks positioned on a coal face. The three-dimensional design method of the hydraulic support comprises the following steps of: simulating the motions of a top plate, a coal bed and a bottom plate in the advancing process of the coal face by adopting discrete element software; building a support-surrounding rock three-dimensional coupling model, and computing the reverse supporting effect and the control action of the hydraulic support on surrounding rock motion; circularly optimizing support parameters to obtain a structure which has optimal supporting effect on the surrounding rocks; simulating to obtain the distribution regularity of the tension, the bending and the torsion internal force of a part of the hydraulic support by adopting dynamic software under the stress conditions, i.e. unbalance loading, torsion, impact of caving rocks on a shield beam of the hydraulic support, and the like, of the hydraulic support at different time, on different positions and under different geological conditions of coal face advancing; and designing and optimizing the structure form of the hydraulic support by combining with structure arrangement requirements and adopting a finite element method. The three-dimensional design method can effectively enhance the adaptive capacity of the hydraulic support on surrounding rock change, strengthen the stability and the reliability and ensure that the coal mining work is safely and efficiently carried out.

Description

technical field [0001] The invention relates to a design method of a hydraulic support, in particular to a three-dimensional design method of a hydraulic support in consideration of the dynamic influence of the surrounding rock of a coal mining face. technical background [0002] Before elaborating on specific technical issues, first explain the meaning of the following three terms: [0003] Surrounding rock of the working face: the rock formation within the range affected by the excavation of the coal mining face, which is divided into three parts: the roof, the coal seam and the floor. [0004] Hydraulic support: support equipment for coal mining face, used to support and control the roof, and isolate the goaf; it is used in conjunction with the coal mining machine to realize the comprehensive mechanization of coal mining. [0005] Coupling: that is, dependence and mutual influence. The boundary condition of the support is the surrounding rock, and the characteristics of...

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): E21D15/44
Inventor 王国法任怀伟刘俊峰
Owner CCTEG COAL MINING RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap