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Gob-side entry retaining side support method of coal bed fully mechanized caving face

A technology of fully mechanized caving face and support method, applied in pillars/supports, mining equipment, earth-moving drilling, etc., to reduce equipment investment, ensure integrity, and reduce bending effects

Active Publication Date: 2010-10-27
兖矿能源集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The key to determining the success of gob-side entry retention is the support of the side of the goaf. At present, the method of supporting the side of the gob-side entry is generally to build a closed concrete wall, which consumes a lot of materials. , It takes a lot of man-hours, and the equipment is complicated, which seriously affects the normal production of the working face

Method used

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  • Gob-side entry retaining side support method of coal bed fully mechanized caving face
  • Gob-side entry retaining side support method of coal bed fully mechanized caving face
  • Gob-side entry retaining side support method of coal bed fully mechanized caving face

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] ①. Every time the working face is pushed forward by 1.4 meters, dig a 300mm column socket on the bottom plate near the gob 5 side behind the head support 2 of the working face. A barrel body is erected in the column socket. The barrel body is a cylinder made of iron plates. The cylinder is divided into inner and outer sections. The inner section can be stretched up and down in the outer section. , the interior of the inner section 7 and the outer section 8 are welded with 3 to 10 vertical steel bars 10, and steel bars 11 are used to weld and fix the vertical steel bars 10 at intervals of 1.2m along the length direction. There is a concrete pouring observation port 6; barrel body handles 9 are arranged on both sides of the barrel body section 7, and a single hydraulic prop is provided under the barrel body handle 9 to pull out the barrel inner section 7 to contact the top plate, and the barrel body The body is placed vertically on the bottom plate, and is in close contac...

Embodiment 2

[0033] ①. Every time the working face is pushed forward by 1.5 meters, a 310mm column socket is dug on the bottom plate near the goaf 5 side behind the head support 2 of the working face. A barrel body is erected in the column socket. The barrel body is a cylinder made of iron plates. The cylinder is divided into inner and outer sections. Both the inner section 7 and the outer section 8 are welded with 3 to 10 vertical steel bars 10, and the vertical steel bars 10 are welded and fixed together with steel rings 11 every 1m along the length direction. Concrete pouring observation port 6; barrel body handles 9 are arranged on both sides of the barrel inner section, and a single hydraulic prop is provided under the barrel body handle 9 to pull the barrel inner section 7 out to contact the top plate, and the barrel body is vertical to the bottom plate Put it in close contact with the roof and floor of the roadway, the upper end of the inner section is provided with a pouring port, ...

Embodiment 3

[0041] ①. Every time the working face is pushed forward by 1.8 meters, a 300mm column nest shall be dug on the floor near the side of the goaf after the end support 2 of the working face. A barrel body is erected in the nest, and the barrel body is a cylinder made of iron plates. The cylinder is divided into inner and outer sections. The inner section 7 can be stretched up and down in the outer section 8. There are 8 vertical steel bars 10 welded inside the section 7 and the outer section 8, and the vertical steel bars 10 are welded and fixed together with steel rings 11 every 0.7m along the length direction, and there is a concrete pouring on the inner and outer sections of the barrel. Observation port 6; barrel body handles 9 are arranged on both sides of the barrel inner section, and a single hydraulic prop is provided under the barrel body handle 9 to pull out the barrel inner section 7 to contact the top plate, and the barrel body is placed vertically on the bottom plate, ...

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Abstract

The invention relates to a gob-side entry retaining roadside support method for a full-mechanized coal seam working surface, which belongs to the field of a coal mine support method. The gob-side entry retaining roadside support method can be realized by utilization of a common shot crete machine, so that equipment investment is reduced. The space between barrels is between 1.4 and 1.8 meters; the number of the barrels for construction is small; the workload is reduced; the construction speed is quick; the influence on the production of the working surface is reduced; normal propulsion of theworking surface is guaranteed; the label of concrete in the barrels can reach NO. 300; the ultimate compressive strength of a sample is 300kgf / cm<2>; the maximum holding power of concrete barrels with the diameter between 600 and 660 millimeters can reach 9,760 kN; bed separation of an immediate roof can be effectively controlled and bending and depression of a basic roof can be reduced; load born by road-in support and deformation of roadway surrounding rock are lightened; the completeness of setting-up roadways is guaranteed; and simultaneously a goaf can be effectively sealed and air leakage and natural ignition of coal can be prevented.

Description

technical field [0001] The invention relates to a roadside side support method, in particular to a roadway side side support method along the goaf in a fully mechanized coal seam caving face. Background technique [0002] Gobside retaining is an important technical measure to alleviate the continuous tension of mining, increase the recovery of coal resources, reduce the rate of excavation, and improve the productivity of mine labor. The key to determining the success of gob-side entry retention is the support of the side of the goaf. At present, the method of supporting the side of the gob-side entry is generally to build a closed concrete wall, which consumes a lot of materials. , It consumes a lot of man-hours and uses complex equipment, which seriously affects the normal production of the working face. Contents of the invention [0003] The present invention aims at the shortcomings existing in the prior art, and provides a gob-side entry retaining in fully mechaniz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D15/02C04B28/00
Inventor 贾民邓小林刘健李伟清李小平
Owner 兖矿能源集团股份有限公司
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