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A method of electroosmosis consolidation to improve the solid filling rate of coal mining goaf

A technology of solid filling and goaf, which is applied in the direction of filling, mining equipment, earth cube drilling and mining, etc. It can solve the problems of complex process, affecting the efficiency of coal mining operation, and large engineering quantity, and achieve simple process and improve the density of gangue , low cost effect

Active Publication Date: 2021-03-02
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of complex process, large engineering quantity, and influence on the efficiency of coal mining operation in the method for increasing the goaf filling rate provided by the prior art, the present invention provides an electroosmotic consolidation method to improve the filling rate of the goaf in solid filling Methods

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  • A method of electroosmosis consolidation to improve the solid filling rate of coal mining goaf
  • A method of electroosmosis consolidation to improve the solid filling rate of coal mining goaf
  • A method of electroosmosis consolidation to improve the solid filling rate of coal mining goaf

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Embodiment 1

[0024] Example 1: A method of electroosmotic consolidation to improve the filling rate of solid filling coal mining goaf. An anode or cathode electrode is connected behind the filling coal mining hydraulic support, and the counter electrode is fixed on the side of the cut hole close to the boundary coal pillar Drainage holes are set on the opposite electrode tube; when the power is turned on, the electroosmotic action between the two electrodes drives the water in the goaf filling material to move to the electrode tube and flow to the ditch by itself, and the electrophoretic action between the two electrodes coalesces to mine The fine material in the empty space filling material reaches the dense space behind the support, and the cement produced by the oxidation-reduction reaction of the material near the two electrodes consolidates the material together to enhance the strength of the filling material and increase the filling rate of the goaf.

[0025] Specific steps are as fol...

Embodiment 2

[0035] Example 2: A method of electroosmotic consolidation to improve the filling rate of solid filling coal mining goaf. An anode or cathode electrode is connected behind the filling coal mining hydraulic support, and the counter electrode is fixed on the side of the cut hole close to the boundary coal pillar Drainage holes are set on the opposite electrode tube; when the power is turned on, the electroosmotic action between the two electrodes drives the water in the goaf filling material to move to the electrode tube and flow to the ditch by itself, and the electrophoretic action between the two electrodes coalesces to mine The fine material in the empty space filling material reaches the dense space behind the support, and the cement produced by the oxidation-reduction reaction of the material near the two electrodes consolidates the material together to enhance the strength of the filling material and increase the filling rate of the goaf.

[0036] Specific steps are as fol...

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Abstract

The invention belongs to the technical field of goaf filling in coal mining, and provides an electroosmotic consolidation method for improving the filling rate of the goaf in order to solve the problems of complex process, large engineering quantity and influence on the efficiency of coal mining operation in the prior art method for increasing the filling rate of the goaf. Method for filling rate of coal mining goaf. The anode or cathode electrode is connected to the back of the filling coal mining hydraulic support, and the reverse electrode tube with a drainage hole is fixed on the side of the cutout near the boundary coal pillar. When the power is turned on, the electroosmotic action drives the water in the goaf filling material to move to the electrode tube And self-flow to the ditch, the electrophoresis coalesces the fine materials in the goaf filling materials to the dense space behind the support, and the cement produced by the redox reaction of the materials near the electrodes consolidates the materials together. In the present invention, through the combined effects of electroosmotic drainage, electrophoretic coalescence, electrochemical cementation and overlying rock loading, the water content is reduced by 41-66%, the filling rate of the goaf is increased to 90.7-95.1%, and the compressive strength of the filling material is Increased by 3.4~7.8 times.

Description

technical field [0001] The invention belongs to the technical field of coal mining goaf filling, and in particular relates to a method for improving the filling rate of solid filling coal mining goaf by electroosmotic consolidation. In solid filling coal mining, electroosmotic drainage, electrophoretic coalescence and electrochemical Modification and other synergistic effects consolidate the filling material, thereby improving the filling rate of the goaf. Background technique [0002] Solid filling coal mining is currently one of the most effective technical approaches to liberate the "three undercuts" of coal pressing. The filling rate of the filling body directly affects the overburden movement and surface subsidence control effect of the filling stope. However, the filling rate of gobs is low in reality, especially in the environment with more water in gobs. Therefore, how to greatly increase the filling rate has become an important issue for solid filling. [0003] At...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F15/00E21F16/00
CPCE21F15/00E21F15/005E21F16/00
Inventor 郭俊庆付仁龙王玉康天合邬锦华闫耀东王小强刘玺宸
Owner TAIYUAN UNIV OF TECH