Gob-side entry retaining method of a solid filling coal mining half-section one-leg shed

A solid filling and single-leg technology, applied in the direction of filling, ground mining, mining equipment, etc., can solve the problems of coal resource loss, complex construction technology, low work efficiency, etc., to save roadway excavation costs, improve recovery rate, and operate easy effect

Inactive Publication Date: 2010-06-30
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the width of the roadway coal pillars between the two mining faces in the upper and lower sections of the filling coal mining is 20-30m, which has caused a large loss of coal resources and has become a bottleneck for improving the recovery rate of coal resources in the filling coal mining technology.
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  • Gob-side entry retaining method of a solid filling coal mining half-section one-leg shed
  • Gob-side entry retaining method of a solid filling coal mining half-section one-leg shed
  • Gob-side entry retaining method of a solid filling coal mining half-section one-leg shed

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Embodiment Construction

[0015] figure 1 Shown is a schematic diagram of the layout of the coal mining face. The coal mining filling hydraulic support 2 is arranged behind the filling coal mining face 1, and the roof support 12 is implemented on the solid coal side of the working face and roadway bolts. As the working face advances, the mined-out area 4 is filled by the filling mining conveyor 3, and at the same time, anchor rods 5 with a spacing of about 2500mm and Φ22×2200mm are used along the direction of the roadway at the 1 / 3 distance between the top plate of the working face and the gob. and Φ17.8×6500mm anchor cable 6 are inserted to fix a row of H-shaped steel 7, figure 2 As shown, the size of the H-shaped steel 7 is 100×100 mm; as the coal mining filling hydraulic support 2 moves forward by one step, the conventional step is about 0.6 meters. First lay a section of metal mesh 11 outside the goaf, Figure 4 As shown; then erect the side wall I-beam 8; then lay the metal mesh 11 in the roof ...

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Abstract

The invention relates to a gob-side entry retaining method of a solid filling coal mining half-section one-leg shed, which comprises the steps of supporting the coal side and the top plate of a roadway entity, filling a gob with a coal mining filling hydraulic support and a fill mining conveyor behind a filling coal mining working surface, and then fixing a row of H-shaped steel with an anchor rod and an anchor rope at the 1/3 point of the distance from an end top plate of the working surface to the gob; with the forward movement of one pace of the coal mining filling hydraulic support, a metal net is paved and side-wall I-beams are bridged firstly on the outer side of the gob; simultaneously, a metal net is paved within 1/3 of the distance from the top plate to the gob, and then a stull I-beam is bridged so as to form a reverse L-shaped one-leg shed steel structure support body; and with the forward movement of the coal mining filling hydraulic support, the side wall I-beams are connected and fixed via steel bars, and one-leg shed steel structure support bodies are connected into sheets which are matched with the support of the coal side and the top plate of a roadway entity to realize the gob-side entry retaining of a filling mining work surface mining roadway. The method is simple, has high support strength and low cost, is implemented easily and has high efficiency.

Description

technical field [0001] The invention relates to a gob-side entry retention method of a solid-filled coal mining half-section single-leg shed, which is especially suitable for gob-side entry retention without coal pillars in a filling coal mining face. Background technique [0002] With the gradual development of solid filling coal mining technology, the "three down" coal pressing has been liberated, the recovery rate of mine resources has been improved, and the needs of coordinated mining of resources and the environment in mining areas have been realized. However, the width of the roadway coal pillars between the upper and lower sections of the mining face in the filling coal mining is set to be 20-30m, which causes a large loss of coal resources and has become a bottleneck for improving the recovery rate of coal resources in the filling coal mining technology. Most of the existing gob-side retaining methods and related patented technologies are carried out on the basis of ...

Claims

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Application Information

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IPC IPC(8): E21C41/00E21D21/00E21D15/44E21D19/06E21F15/06
Inventor 缪协兴张吉雄黄艳利巨峰
Owner CHINA UNIV OF MINING & TECH
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