Fully mechanized mining gob-side entry retaining-based concrete block staggered joint longitudinal stacking wall forming method

Abstract

The invention discloses a fully mechanized mining gob-side entry retaining-based concrete block staggered joint longitudinal stacking wall forming method, which comprises the following steps of: manufacturing concrete building blocks comprising at least two types of building blocks of different weights and sizes; feeding the concrete building blocks to a building entry on a working surface and building a wall main body, wherein the wall main body is formed by longitudinally stacking odd-layer building blocks and even-layer building blocks, paving seams between adjacent odd-layer concrete building blocks and paving seams between even-layer adjacent concrete building blocks are formed in a staggered way, large-weight concrete building blocks are used for building below a position, which is 1.2 meters above the ground, of the wall main body and light-weight building blocks are used for building above the position which is 1.2 meters above the ground; and plugging support bags in which pulverized fuel ash is filled into the space between the wall main body and a top plate. By the method, entry cost after mining can be lowered, and the operation efficiency of a coal pillar-free mining mode is improved.

Description

technical field [0001] The invention relates to a method for a mining mode without coal pillars, in particular to a method for vertically coded concrete blocks into walls based on fully mechanized gob-side entry retention in medium-thick coal seams. Background technique [0002] Gob-side entry retention technology has been an important technical development direction of coal mining in my country since it began to be used in my country in the 1950s. The popularization and application of coal-pillar-free filling mining mode is an important part of exploring and realizing energy-saving and emission-reducing circular economy ideas and implementing the sustainable development strategy of human survival in the current coal mine production and construction in my country. my country's existing mine buildings, railways, and villages, that is, the proportion of "three under" coal reserves exceeds 30%, and the coal resources that cannot be mined due to the threat of gray water are not ...

AI Technical Summary

Problems solved by technology

[0005] 1. Unreasonable wall structure, unreasonable block arrangement, seam pressing, and combination method, poor stress state of the wall, poor lateral pressure resistance, and poor stability;

[0006] 2. The strength of the block is too low, and the shape, size, length and width of the block are unfavorable to the stress state of the wall;

[0007] 3. The width, height, and strength of the wall are not compatible with the stress of the surrounding rock of the roadway and the movement of the roof

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