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A method of interval filling and gob-side entry retention for processing undercover gangue

A technology of empty entry retaining and gangue, which is applied in the fields of filling, earthwork drilling, safety devices, etc., can solve the problems of difficult transportation of gangue and difficulty of mechanical undercover, and achieve the effect of saving comprehensive cost, reducing transportation cost and simple process.

Inactive Publication Date: 2016-04-06
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, due to the impact of the support pressure in front of and behind the working face, the roadway behind the retaining road usually produces a large number of floor drums. In order to ensure the normal use of the next working face, it must be undercover. It is difficult to undercover mechanically for support, and it is difficult to transport the gangue produced mainly by manual undercover

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  • A method of interval filling and gob-side entry retention for processing undercover gangue

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Embodiment Construction

[0016] The specific steps of the interval filling gob-side entry retention method for processing undercover gangue of the present invention are as follows:

[0017] a. With the advancement of the coal mining face 1, according to the stability of the roof, after the coal is cut, the metal mesh 4 is laid in front of the end hydraulic support and the bolt / cable support 3 is carried out;

[0018] b. Erect a single hydraulic prop behind the coal mining face 1. When the coal mining face 1 advances to a filling step distance of 2 to 4 m, clean up the floating coal and floating gangue in the 8 roadways of the gob-side retaining entry and the floor of the filling area, Build the filling formwork on the side of gob-side entry 8 and goaf 5, hang filling bags in the filling formwork, secure the four corners, and use high-water materials or paste materials to construct the filling wall 6 beside the entry; Double-liquid equivalent filling pumps are arranged in the moving roadway 2 or in the...

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Abstract

The invention relates to a spacing-filling gob-side entry retaining method for treating dinting gangue. The method comprises the following steps: (1) supporting by adopting a bolt mesh anchor or no supporting according to the roof condition of a filling area along with the backstopping of a working surface; (2) constructing a roadside packing body behind a hydraulic support, and reserving a space with 2-4mm in length and without filling according to the roof condition after the roadside packing body is constructed to a certain length; (3) after a gob-side entry is stabilized or a certain distance is reserved behind the gob-side entry along with the propulsion of the working surface, piling up the gangue generated by bottom clearing of a bottom heave of a roadway and bagged by woven bags or snake leather bags in the space of the roadside packing body, so as to achieve the roof supporting and goaf sealing effects together with the filled wall body; and (4) repeating the above steps to form a continuous roadside supporting wall body for mining a next working surface. By adopting the method, high-water materials can be saved, the entry retaining cost, the subsidiary transport expense caused by dinting and the labor intensity are reduced, and the gangue can be treated and utilized.

Description

technical field [0001] The invention relates to the field of side support for underground gob-side entry retention, in particular to a method for interval filling wall construction suitable for producing gangue after undercover gob-side entry retention to provide storage space. Background technique [0002] Gobside retaining means that during the mining process of this working face, a roadway is retained as the next working face by adopting reasonable roadway support technology and roadside support technology (gangue, concrete, high-water materials, dense pillars, etc.) In normal use, it can greatly improve the resource recovery rate and relieve the tension of mining replacement. It is also the space basis for technologies such as continuous mining without coal pillars, coal and gas co-mining, and continuous pressure relief mining of coal seam groups. A major overhaul in technology. However, due to the impact of the support pressure in front of and behind the working face, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18E21F15/00
Inventor 陈勇柏建彪王襄禹闫帅王猛赵地杰徐营
Owner CHINA UNIV OF MINING & TECH
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