Method for preventing hydraulic bracket in large inclined angle workface from collapsing

A technology of hydraulic support and working face, which is applied to mine roof support, earth-moving drilling, mining equipment, etc., can solve the problems of support dumping, high labor intensity and unrealistic roof connection, so as to maintain the stability of the roof and simplify the mesh laying process. , the effect of low labor intensity

Inactive Publication Date: 2012-01-18
CHINA UNIV OF MINING & TECH
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  • Description
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Problems solved by technology

When the roof is broken, the above method is difficult to achieve a good effect. At this time, the bracket is prone to roof fall due to leaks between the racks and the roof is not solid, resulting in an inverted rack
At present, there i

Method used

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  • Method for preventing hydraulic bracket in large inclined angle workface from collapsing
  • Method for preventing hydraulic bracket in large inclined angle workface from collapsing
  • Method for preventing hydraulic bracket in large inclined angle workface from collapsing

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Embodiment Construction

[0015] Implementation of the present invention will be further described below in conjunction with accompanying drawing:

[0016] as attached figure 1 As shown, the anti-falling method of the large-inclination working face hydraulic support of the present invention: first, in the middle of each hydraulic support 1 of the coal mining face, an anchor rod 3 is tilted along the roof to the direction of the coal wall 4, and the anchor rod 3 is the whole Thread equal-strength bolts, the length of which is not less than 2.2m and the diameter of not less than 18mm, the angle α between the bolt 3 and the top plate of the coal wall 4 is 40°~50°; The exposed ends of each anchor rod 3 are connected in series, and then the wire mesh 7 is hung on the steel wire rope 5 connected in series, as attached figure 2 As shown; when the hydraulic support 1 moves forward, the suspended metal mesh 7 is jacked up and attached to the front beam of the hydraulic support 1, and as the coal mining face a...

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Abstract

A method for preventing a hydraulic bracket in a large inclined angle working face from collapsing comprises the steps of obliquely driving an anchor rod in the middle of each hydraulic bracket in the working face along direction of from the top plate to the coal wall; connecting exposed ends of anchor rods in series by using steel wire ropes and hanging a metal net on the connected steel wire ropes; when the hydraulic brackets move forward, jacking the hung metal net to attach front beams of the hydraulic brackets; with advancing of the mining working face, enabling the hydraulic brackets to move forward, splicing and lengthening the metal net till the metal net is paved on the whole hydraulic bracket or stopping splicing the metal net after the top plate is stable and does not collapse. The method has the advantages of simple operation, safety, reliability and high efficiency, and effectively prevents the hydraulic bracket in the large inclined angle working face from collapsing under a condition that the top plate is crushed.

Description

technical field [0001] The invention relates to the field of coal mining methods, in particular to a method suitable for preventing a hydraulic support from toppling under the condition of a broken roof on a working face with a large inclination angle. Background technique [0002] In recent years, the mining of high-dip coal seams (20°-35°) has become more and more common in my country. There are two reasons: First, there are abundant high-dip coal seams in the west. Although high-inclination coal seams only account for about 17% of the country's reserves, more than 50% of mines in western mining areas have high-inclination coal seams, and high-inclination coal seams are the main mining coal seams in many mining areas or mines. The second is that many years of mining have depleted the reserves of "superior" coal seams in the eastern mining area. With the continuous increase of coal mining intensity, many mines have to shift from relatively "superior" coal seam mining to com...

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Application Information

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IPC IPC(8): E21D23/04E21D23/18E21D20/00
Inventor 马立强曹新奇张东升
Owner CHINA UNIV OF MINING & TECH
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