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Gob-side entry retaining method for anchor bolt network gangue bag wall body for coal mining without pillars

A technology of retaining an empty roadway without coal pillars, which is applied in the direction of mining equipment, earthwork drilling, installation of anchor rods, etc., and can solve the problem that the cost of roadside support materials cannot be realized.

Inactive Publication Date: 2012-09-12
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 defects in the above-mentioned prior art, the present invention provides a method for retaining roadways along the gob with anchor bolt mesh gangue bag wall for mining mode without coal pillars, and solves the problem that the existing technology cannot realize high cost of roadside support materials and early wall formation. The technical problems of strong and large rigidity support, lateral compression resistance, longitudinal compression resistance and proper pressure yielding, as well as the simplification of the entry retaining process, reduce the cost of coal mine filling and improve the operation efficiency of the mining mode without coal pillars

Method used

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  • Gob-side entry retaining method for anchor bolt network gangue bag wall body for coal mining without pillars
  • Gob-side entry retaining method for anchor bolt network gangue bag wall body for coal mining without pillars
  • Gob-side entry retaining method for anchor bolt network gangue bag wall body for coal mining without pillars

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Embodiment Construction

[0024] The present invention provides a gob-side entry retaining method for anchor bolt mesh gangue bag wall used in the mining mode without coal pillars. In order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the following will be combined with the accompanying drawings and embodiments , to further describe the present invention in detail.

[0025] The invention crushes the solid waste obtained by excavation gangue or coal gangue separation to a certain particle size, uses ordinary or special plastic woven bags to carry out standard gangue bagging, and then sends the gangue bag filling body to the working face for construction and storage through the underground transportation system. The location of the roadway, with the advancement of the working face under the condition of closed support of the single hinged roof beam, adopts the technology of retaining the roadway along the gob with the anchor bolt mesh gangue bag wall...

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Abstract

The invention discloses a gob-side entry retaining method for an anchor bolt network gangue bag wall body for coal mining without pillars. The gob-side entry retaining method comprises the following steps of: A, crushing solid wastes obtained by separating tunneling gangue and / or coal gangue until the granularity is small than 0.1m and bagging by adopting plastic woven bags to obtain gangue bags; B, conveying the gangue bags obtained in the step A to the position of a working surface, which is used for building an entry, through an underground conveying system and fixing the gangue bags for building a roadside gangue bag wall body to form a gob-side entry; C, arranging the gangue bag wall body into a plurality of steps with different heights; and D, building the gangue bag wall body to the designed position and height and then mounting anchor bolts and paving a metal net, and simultaneously, paving a vertical protection steel belt, carrying out two-way anchoring or single-side pretightening in a large-pallet lane and keeping a gangue bag filling body in the gangue bag wall body in a three-dimensional stress state to achieve the functions of increasing the side pressure of the gangue bag filling body and improving the strength and the rigidity of the filling body.

Description

technical field [0001] The invention relates to a method for a coal pillar-free mining mode, in particular to a gob-side entry retention technology for a coal pillar-free mining mode. 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 the 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 strategy of sustainable development of human survival in the current coal mine production and construction in my country. A lot of work has been done in research, and the technology of gob-side entry retention in thin and medium-thick coal seam coal mining faces with better conditions has been perfected day by day. As it becomes more mature, there are many roadside support methods for gob-side...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/04E21D21/00
Inventor 林东才李洪肖庆华魏夕合林伟立张培森
Owner SHANDONG UNIV OF SCI & TECH
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