Short-wall waste rock gluing continuous mining and continuous filling mining method

A wall gangue and cementation technology, which is applied in the direction of filling, ground mining, mining equipment, etc., can solve the problems of surface water level drop, gangue pile accumulation, and large subsidence, so as to achieve small equipment investment, reduce surface deformation, and control The effect of roof sinking

Inactive Publication Date: 2017-03-22
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] At present, the mining technology in the existing technology mainly adopts the wall caving mining method. The ov...

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  • Short-wall waste rock gluing continuous mining and continuous filling mining method
  • Short-wall waste rock gluing continuous mining and continuous filling mining method
  • Short-wall waste rock gluing continuous mining and continuous filling mining method

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[0043] The present invention proposes a short-wall gangue cemented continuous mining and continuous filling coal mining method. In order to make the advantages and technical solutions of the present invention clearer and clearer, the present invention will be described in detail below in conjunction with specific examples.

[0044] 1. Material ratio design

[0045] The filling material of the grouting system involved in the present invention is ordinary 32.5 cement, fly ash, calcium carbide 1:3:1, and the mass concentration is 50%. 4:6 mixture, the mass concentration of the finished filling material is 75-78%, and the design 28-day filling body strength is not less than 2MPa.

[0046] 2. Length design along the groove

[0047] The length of the trough mainly considers the transportation of coal and gangue, and the belt conveyor is used for continuous transportation. The width of the belt is preferably 1.0-1.4m, and 1.1m is used. According to the transportation cost and ventil...

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Abstract

The invention discloses a short-wall waste rock gluing continuous mining and continuous filling mining method and belongs to the technical field of coal mine filling and mining. The problem that in the prior art, due to the fact that an overlying strata above a goaf directly collapses, surface deformation is severe is solved. The method comprises the steps that a coal seam is divided into a plurality of strip coal pillars according to the fixed width in the direction parallel to open-off cut, then the strip coal pillars are mined sequentially at intervals through a continuous mining machine, the strip coal pillars are filled sequentially at intervals after a roof is stabilized, specifically, cement slurry and waste rock reach a working face through a grouting system and a waste rock delivery system correspondingly, are mixed and are injected for filling a branch roadway, and the filling and mining process is completed. The short-wall waste rock gluing continuous mining and continuous filling mining method is adopted for filling and mining, the roof does not sink, only bending deformation happens, and the defects of wall type caving mining are overcome effectively; and meanwhile, surface deformation is small, surface buildings can be effectively protected, and a new idea is provided for three-underground mining.

Description

technical field [0001] The invention relates to the technical field of coal mine filling and mining, in particular to a short-wall gangue cemented continuous mining and continuous filling coal mining method. Background technique [0002] With the mining of my country's coal gold for ten years, the problem of "three under" coal pressure that restricts the development of coal has become more and more prominent. According to incomplete statistics, the amount of "three under" coal pressure in my country has reached 14 billion tons. How to mine safely and efficiently "Three downs" coal resources, more and more people's attention. [0003] At present, the mining technology in the existing technology mainly adopts the wall caving mining method. The overlying strata in the goaf directly collapse, resulting in serious surface deformation and large subsidence. The problem is getting worse. CN103883350A discloses a filling coal mining method with skip mining at intervals. The method i...

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Application Information

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IPC IPC(8): E21C41/16E21F15/00
CPCE21C41/16E21F15/00E21F15/005
Inventor 张新国李飞张保良孔贺庞振忠张志勇李飞帆王星宇
Owner SHANDONG UNIV OF SCI & TECH
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