Laneway side support design method based on weak plane shear and support theories

A technology of roadway support and design method, applied in design optimization/simulation, calculation, mining equipment, etc. Material waste and other issues, to achieve the effect of ensuring scientificity and applicability, reducing support costs, reducing support materials and support costs

Inactive Publication Date: 2017-02-15
DIZHEN COAL MINE SHANDONG TAISHAN ENERGY +2
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the roadway support has always followed the support parameters in the preliminary design of the mine, and there has been no breakthrough in the scientificity and applicability of the support para

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
  • Laneway side support design method based on weak plane shear and support theories
  • Laneway side support design method based on weak plane shear and support theories
  • Laneway side support design method based on weak plane shear and support theories

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1. Taking the 31104E middle roadway of a certain mine as an example, the 31104E middle roadway is a semi-coal rock roadway, the coal thickness is 1.6m, the barren height is 2.5m, and the bottom is 0.9m. The specific implementation steps are as follows:

[0036] (1) Establish a force balance mechanical model for the rock mass around the semi-coal-rock roadway to slide and fail along a weak surface under the action of external force, as shown in Figure 1. Assuming that the weak surface shears along the dotted line in the figure, the weak surface is a shear surface, and the angle between the weak surface and the horizontal direction is α, m is the width of the rock block, and the downward normal force exerted on the roadway by the uniform load is f 0 , F 0 The decomposed force along the shear plane and its perpendicular direction is F 1 , F 2 , the compressive strength is P 0 , compressive strength P 0 The decomposed shear strength and its strength in the v...

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 laneway side support design method based on weak plane shear and support theories. The laneway side support design method comprises the following steps: building a stress balance mechanical model for a slip failure of rock mass around a half coal and rock laneway along a certain weak plane alpha under the action of external force; judging a critical condition under which a shear failure occurs on surrounding rocks on a half coal and rock laneway side; determining that shearing strength on an inner side of the laneway in a direction of 45 degrees is maximum; building a support mechanical model for the half coal and rock laneway side based on the shearing strength principle that the rock mass needs to be pressed against a largest shearing weak plane on a largest shearing block after being reinforced and supported by anchor rods; and giving a calculation formula for the number n of the anchor rods on the weak planes on the laneway side and a length l of an ith anchor rod in order to design the laneway side support. Through adoption of the method, support materials are reduced; the support cost is lowered; and a beneficial reference is provided for scientific performance and applicability of support parameters.

Description

technical field [0001] The invention relates to a roadside support design method based on the weak surface shear support theory, and is especially suitable for the support of the roadway side of semi-coal and rocky roadways. Background technique [0002] In recent years, with the continuous downturn of the coal market, reducing mining costs and realizing scientific and economical mining has become the primary task of coal enterprises to reform and develop against the trend. How to carry out reforms in support, continuously reduce the input of support materials, establish a scientific support system for different surrounding rock characteristics, service life, and roadway functions, and fundamentally reduce support costs are important contents that mines need to study. [0003] At present, the roadway support has always followed the support parameters in the preliminary design of the mine, and there has been no breakthrough in the scientificity and applicability of the suppor...

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): G06F17/50E21D20/00
CPCE21D20/00G06F30/13G06F30/20
Inventor 崔树彬公建祥卢鑫张吉雄张强郑永胜
Owner DIZHEN COAL MINE SHANDONG TAISHAN ENERGY
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