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A gob-side entry retaining method for cutting and directly topping the roadside support wall

A technology of roadside support and empty roadway retention, which is applied to earth drilling, ground mining, underground mining, etc., and can solve problems such as low construction efficiency and complex process of making roadside support walls

Active Publication Date: 2020-07-07
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of complex process and low construction efficiency in the process of making roadside supporting walls in the process of retaining roadways along gobs, the present invention provides a method for retaining roadways along gobs by cutting and directly topping them to make roadside supporting walls, and the specific technical scheme as follows

Method used

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  • A gob-side entry retaining method for cutting and directly topping the roadside support wall
  • A gob-side entry retaining method for cutting and directly topping the roadside support wall
  • A gob-side entry retaining method for cutting and directly topping the roadside support wall

Examples

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Effect test

Embodiment 1

[0033] A method of retaining a gob-side entry by cutting and directly topping it as the supporting wall beside the entry. The specific construction steps are as follows:

[0034] Step A. Install the gob-side entry support behind the end support of the working face, the end support 5 and the gob-side entry support are connected by a hydraulic cylinder 51, and the moving frame of the gob-side entry support is pushed by the hydraulic cylinder 51, Gobside retaining support includes supporting mechanism 1, drilling mechanism 2, descending mechanism 3 and pushing mechanism 4, such as Figure 4 shown.

[0035] Among them, the support mechanism 1 of the gob-side entry retaining support includes a column 11, a top beam 12 and a bottom beam 13 to protect the construction space where the roof is cut off. The top beam 12 is connected to the upper end of the column, and the bottom beam 13 is connected to the lower end of the column 11. 1 is provided with four upright columns 11, combined ...

Embodiment 2

[0051] In order to further illustrate the construction process of the gob-side entry retaining method of cutting off the direct roof as the roadside support wall, taking the 1310 working face of a certain mine as an example, the present invention will be further described in detail. The 1310 working face of this mine mainly mines 3 coal seams with a thickness of 2.8m. The roof stratum is fine sandstone, which belongs to the medium-hard roof. The mining roadway is excavated along the bottom, and the cross-sectional shape is rectangular. Mining is carried out by using the gob-side retaining method of cutting off the direct roof as the supporting wall beside the roadway. The construction steps include:

[0052] Step A. Install the gob-side entry support behind the end support of the working face. The end support and the gob-side entry support are connected by a hydraulic cylinder. The retaining support includes a supporting mechanism 1, a drilling mechanism 2, a lowering mechani...

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Abstract

The invention provides a gob-side entryretaining method for cutting off a direct roof to make a roadside supporting wall body, and relates to the technical field of underground mining methods. The gob-side entryretaining method includes the steps that A, a gob-side entryretaining bracket is installed at the rear of a bracket of the end head of a working face, and the gob-side entryretaining bracket includes a supporting mechanism, a hole drilling mechanism, a descending mechanism, and a pushing and moving mechanism; B, after working face coal cutting, the gob-side entryretaining bracket is moved by a hydraulic cylinder, and a roof plate is drilled by the hole drilling mechanism; C, a drilling hole is internally filled with medicine and is sealed, and a lifting plate of the lifting mechanism is lifted below the roof plate; D, the roof plate above the gob-side entryretaining bracket is cut off in a blasting mode, and the lifting plate is lowered; E, after the lifting plate is descended to a bottom plate, the pushing and moving mechanism pushes the cut roof plate into a roadway of an gob-side entry through a hydraulic jack; and F, concrete is sprayed at gaps of the cut roof plate, andthe steps from A to F are repeated until the end of stoping. The technical problems of complicated and inefficient gob-side entryretaining construction under the condition of the medium and hard roofplate are solved, in addition, the gob-side entryretaining method further has the advantages of being low in labor intensity, low in entry forming cost and the like.

Description

technical field [0001] The invention relates to the technical field of underground mining methods, in particular to a gob-side retaining method for cutting blocks into blocks and directly topping them to form roadside supporting walls. Background technique [0002] Mining without coal pillars is beneficial to improve the recovery rate of coal, and can also eliminate or reduce the disasters caused by coal pillars, so it has been widely used in recent years. With the acceleration of the depletion of coal resources, coal pillarless mining is getting more and more attention from the industry. Gobside entry retention is an important development direction of pillarless mining. The gob-side retaining roadway has no coal pillar protection, which improves the recovery rate of coal resources, rationally develops coal resources, prolongs the service life of the mine, and is conducive to the sustainable development of the mine; the gob-side retaining roadway is transformed into a retai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/16
Inventor 栾恒杰蒋宇静陈永强张照允林惠立张孙豪单清林张学朋
Owner SHANDONG UNIV OF SCI & TECH
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