Method for actively controlling motion of coal mine critical layers by using strip filling walls

A strip filling and active control technology, applied in the fields of filling, ground mining, mining equipment, etc., can solve problems such as damage and surrounding rock damage, and achieve the effect of avoiding accumulation, improving safety level, and preventing impact ground pressure.

Inactive Publication Date: 2013-09-25
SHANDONG UNIV OF SCI & TECH
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. By inducing the simultaneous release of the compressive elastic energy of the coal seam at the peak position of the bearing pressure, it leads to the destruction of the surroun

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
  • Method for actively controlling motion of coal mine critical layers by using strip filling walls
  • Method for actively controlling motion of coal mine critical layers by using strip filling walls
  • Method for actively controlling motion of coal mine critical layers by using strip filling walls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] control figure 1 , assuming that the burial depth of the coal seam in a working face is 700m, the thickness of the coal seam is 3.0m, the immediate roof is siltstone, the thickness is 9.3m, the key layer is medium sandstone, the thickness is 25m, and the bulk density is 2.7t / m 3 , the compressive strength of the filling body of wall is that 40Mpa is the basic condition to illustrate the implementation steps of the present invention:

[0033] First drill cores, assuming that the measured uniaxial tensile strength value of the sandstone in the key layer is 10.49MPa;

[0034] 1. Calculate the initial fracture step of the key layer:

[0035] C 0 = 2 m σ t × 100 γ z = 2 ...

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 relates to a coal mine rock burst pre-controlling method, particularly to a method for actively controlling motion of coal mine critical layers by using strip filling walls. The method comprises the steps of calculating initial fracture steps of the coal mine critical layers by using a mine pressure theoretical model, determining intervals of the strip filling walls through combining experience safety factors, and calculating widths of the filling walls according to coal bed buried depths, rock stratum volume weights and unidirectional compressive strength of filling materials, and performing construction of the strip filling walls. According to the method, danger relieving measures passively adapted to abrupt fractures of critical layers in the prior art are changed into the measure of eliminating preconditions of fracture of coal mine critical layers in advance, so that pre-defense for coal mine rock burst is achieved. According to the method, the coal mining production efficiency can be improved, the work amount of filling construction of coal mine working faces is reduced, filling materials are saved, and the production cost per unit of coal is reduced.

Description

technical field [0001] The invention relates to a method for pre-controlling rock burst in coal mines, in particular to a method for actively controlling the movement of key layers in coal mines by using strip filling walls. Background technique [0002] Coal mine rock burst is a catastrophic dynamic phenomenon in which the coal or rock mass suddenly protrudes during the excavation and mining process, causing casualties, roadway, equipment damage, and even ground vibration. [0003] The control of rock burst in coal mines is still an international problem. Every year, thousands of meters of tunnels are damaged by rock burst, causing many casualties and causing direct economic losses of billions of yuan, affecting nearly 10 billion tons of deep coal resources. safe mining. Therefore, the rock burst pre-control technology has important scientific value for overcoming the international problem of rock burst prevention and control. [0004] The mining rockburst refers to the r...

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): E21F15/00E21C41/16
Inventor 石永奎郝建汤建泉齐敏华
Owner SHANDONG UNIV OF SCI & TECH
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