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

Ascending mining feasibility determination method for tool post residual mining area considering static disturbance loading and unloading

A determination method and technology of residual mining area, applied in surface mining, earthwork drilling, underground mining, etc., can solve problems such as lack of consideration, staying qualitative experience level, instability, etc., to avoid determination errors and prolong service life. , the effect of improving the accuracy

Active Publication Date: 2018-10-19
TAIYUAN UNIV OF TECH
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The above method is not suitable for the determination of upward mining in the residual mining area of ​​the cutter column, and only stays at the qualitative experience level, which cannot meet the requirements of production practice;
[0005] (2) The existing methods for judging the feasibility of upward mining in the residual mining area of ​​the knife column do not study the stability of the remaining coal pillars and interlayer rock formations in the residual mining area of ​​the knife column as a system, and do not give a quantitative determination formula for stability;
[0006] (3) The existing judgment method does not consider the effect of the disturbance load generated during the mining of the upper remaining coal seam on the remaining coal pillar and interlayer rock formation system in the residual mining area of ​​the knife column, and the disturbance load is to cause the instability of the coal pillar and interlayer rock formation system one of the important factors
[0007] In addition, in the existing mines, the roof of the remaining coal seam in the upper part of the residual mining area has the characteristics of loose, broken and unstable rock formations. When the remaining coal seam is mined, the roof falls with the mining and is re-compacted to almost restore to the original rock stress. However, in some residual mining areas, the roof strata of the remaining coal seams are mainly medium-hard and hard rock formations, and the roofs are not easy to fall when the residual coal seams are mined. Different residual mining areas have different characteristics, and the difficulty of mining cannot be generalized; The relationship between the width of the disturbance load on the upper layer and the suspended span of the interlayer rock between the two layers of coal also affects the safety of coal mining.

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
  • Ascending mining feasibility determination method for tool post residual mining area considering static disturbance loading and unloading
  • Ascending mining feasibility determination method for tool post residual mining area considering static disturbance loading and unloading
  • Ascending mining feasibility determination method for tool post residual mining area considering static disturbance loading and unloading

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than All the embodiments; based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work all belong to the protection scope of the present invention.

[0033] Such as figure 1 As shown, it is the distribution pattern diagram of the residual mining area of ​​the knife column and the remaining coal seam, where A indicates the coal pillar left in the residual mining area of ​​the knife column; B indicates the goaf area of ​​the knife column; C indicates the remaining coal seam; D indicates the interlayer rock formation; E Indicates the overlying strata and topsoil ove...

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 an ascending mining feasibility determination method for a tool post residual mining area considering static disturbance loading and unloading and belongs to the field of coalmining technology. According to the method, first, distribution positions of the tool post residual mining area and leftover coal seams are ascertained, the composition, structure and physical mechanical parameters of rock strata between the coal seams are acquired, and the rock strata between the coal seams are subjected to unified division and numbering from bottom to top; second, the position of a control rock stratum is determined, and disturbance loads acting on leftover coal posts and the control rock stratum in the tool post residual mining area after bearing pressure is subjected to propagation attenuation are calculated respectively; and last, considering the action of static disturbance loading and unloading, the stability of the leftover coal posts and the control rock stratum in the tool post residual mining area is analyzed, and an ascending mining feasibility determination result of the tool post residual mining area is obtained. Through the method, the situation that anempirical method has a large error is avoided, a theoretical basis is provided for ascending residual coal safe mining in the tool post residual mining area, the recovery rate of upper coal resourcesin the tool post residual mining area is increased, and the service life of a mine is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and in particular relates to a method for judging the feasibility of upward mining in a residual mining area of ​​a cutter post with static disturbance loading and unloading. Background technique [0002] With the increase of coal mining intensity, coal resources with better mining conditions in many mining areas are gradually decreasing. The remaining coal seam in the upper part of the residual mining area has considerable reserves and good mining value, and the problem of its safe mining has become increasingly prominent. [0003] The existing identification methods for upward mining in residual mining areas mainly refer to the identification methods of caving upward sequential mining, namely the ratio identification method, the "three-zone" identification method and the surrounding rock balance method. These judgment methods are basically based on layer spacing and mining thickness, and t...

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): G06F17/50E21C41/18
CPCE21C41/18G06F30/20G06F2119/06
Inventor 冯国瑞杨文博张玉江闫勇敢白锦文杜云楼李松玉孙强康立勋
Owner TAIYUAN UNIV OF TECH
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