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Method and device for performing plasma ascending cracking remaining coal pillar in residual mining area

A plasma and legacy coal pillar technology, applied in ground mining, earth-moving drilling, underground mining, etc., can solve the problem of little application of plasma fracturing technology, and achieve the effect of easy control, good effect, and reduced integrity

Active Publication Date: 2019-10-29
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of plasma fracturing technology in the field of coal mining technology (especially in the coal pillar left in the upward plasma fracturing residual mining area) is seldom.

Method used

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  • Method and device for performing plasma ascending cracking remaining coal pillar in residual mining area
  • Method and device for performing plasma ascending cracking remaining coal pillar in residual mining area
  • Method and device for performing plasma ascending cracking remaining coal pillar in residual mining area

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Effect test

Embodiment 1

[0036] Such as figure 2 As shown, a device for upward plasma cracking of coal pillars left in the residual mining area, specifically including: plasma generator 1, plasma pulse controller 2, high-voltage cable 3, electrode stabilization device 4, liquid phase discharge plasma electrode 5. Data acquisition instrument 6, signal amplifier 7, signal transmission line 8, detection probe 9, water storage tank 10, high pressure pump 11, cooler 12, pressure gauge 13, dual water pipe 14, high pressure water nozzle 15, plasma generator Cooling control valve T1, high pressure water nozzle control valve T2.

[0037] The plasma pulse controller, plasma generator, electrode stabilizing device, and liquid-phase discharge plasma electrode are connected through a high-voltage cable; the plasma generator releases electric energy through the high-voltage cable, electrode stabilizing device, and liquid-phase discharge plasma electrode, among which The high-voltage cable is responsible for the t...

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Abstract

The invention discloses a method and a device for performing plasma ascending cracking on remaining coal pillar in residual mining area and belongs to the technical field of coal mining. The remainingcoal pillar in the residual mining area is subjected to ascending cracking by a plasma device from an underlie coal seam, impact wave is formed by completely utilizing the characteristic that strongmovement along ions instantly generate high temperature and high pressure to enable the coal pillar to generate crack and expand, the integrity of the coal pillar is reduced and the aims of weakeningstrength, releasing stress and retarding strata behavior are fulfilled, so that green mining of coal is realized and safety production is realized.

Description

technical field [0001] The invention relates to a method and a device for upwardly fracturing a coal pillar in a residual mining area by plasma, and belongs to the technical field of coal mining. Background technique [0002] In the early days of the founding of New China, my country's coal mining technology was relatively backward. In order to ensure the stability of the surrounding rock and ensure the safe production of the working face, some coal pillars were left to support the overlying strata; in the modern highly mechanized mining process, affected by the structure and Due to the limitation of other mining conditions, it is inevitable to leave some coal pillars; when adopting the pillar system coal mining method, some coal pillars will be left unmined. This has just resulted in a large number of remaining coal pillars in the residual mining area after the coal seam has been mined. [0003] When the downward mining method is used in coal mines in my country, the underl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21C37/18E21C37/12
CPCE21C37/12E21C37/18E21C41/18
Inventor 冯国瑞毋皓田白锦文张纯旺宋诚李化运李松玉冉洪宇康立勋
Owner TAIYUAN UNIV OF TECH
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