Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving

A technology for fully mechanized mining and caving without coal pillars, which is applied in the fields of backfill, mining equipment, earth-moving drilling and mining, etc., can solve the problems of inability to realize, large deformation of surrounding rock, and complicated filling construction process.

Inactive Publication Date: 2012-02-01
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

It solves the problems of waste of coal resources in the existing fully mechanized caving along the goaf, low coal recovery rate, complicated filling construction technology, and the inability to realize the integration of side expansion, filling and support to control th

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  • Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving
  • Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving
  • Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving

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[0027] The present invention provides a method for expanding and filling support for roadway in fully mechanized top coal caving mining without pillars. In order to make the objectives, technical solutions and advantages of the present invention clearer and clearer, the present invention will be further improved with reference to the accompanying drawings. Detailed description.

[0028] The invention provides a method for expanding and filling and supporting a roadway for fully mechanized top coal caving coal without pillar mining, which is a concrete filling material produced by mixing stones, sand, cement, fly ash, and additives (early strength agents) with water and mixing uniformly , Through long-distance pumping to the filling mold, expanding and filling, the integrated control technology of expanding, filling and supporting is realized, which improves the coal recovery rate, reduces the maintenance cost of the lower section and the roadway in this section, and improves The ...

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Abstract

The invention relates to a method for enlarging, filling and supporting a coal-pillar-free mining roadway for fully-mechanized top coal caving, which comprises the following steps of: A, evenly mixing gravel and sand on a ground mixing plant; B, transferring the obtained mixture of the gravel and the sand, cement, flyash and additive to a storing part of an underground pump station; C, loading the materials in the step B to a mixer to be mixed evenly to obtain filling concrete; D, pumping the concrete obtained in the step C to a filling module, and filling along with the enlarging to ensure filling quality; E, forming a filling wall with an early strength in the filling module by the concrete, and demoulding after the filling wall reaches the supporting strength of a top plate; F, cleaning a filling pipeline, and pumping clean water to moisten the pipeline and test the pressure; and G, repeating the steps A-F until the filling is completed.

Description

technical field [0001] The invention relates to a support method for fully mechanized top-coal caving without coal pillar mining, in particular to a method for fully mechanized top-coal caving without coal pillar mining roadway expansion side filling concrete wall support method. Background technique [0002] The popularization and application of coal pillar-free mining mode is an important part of exploring the realization of energy-saving and emission-reduction ideas and implementing the strategy of sustainable development of human survival in the current coal mine production and construction in my country. At the same time, coal pillar-free mining technology is an important research of "green mining". Branch is also one of the key research directions funded by the National Twelfth Five-Year Plan. The reserves of adjacent coal seams that cannot be exploited due to the concentrated stress of the coal pillars in the existing mines in the protection roadway in my country may b...

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Application Information

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IPC IPC(8): E21F15/00E21F15/02E21D21/00
Inventor 林东才魏夕合张培森刘庆龙穆玉兵
Owner SHANDONG UNIV OF SCI & TECH
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