Treatment method for upper corner suspension roof of heavy pitch fully mechanized mining coalface

A technology of fully mechanized mining face and coal mining face, which is applied in the direction of drilling equipment and methods, ground mining, mining equipment, etc., and can solve problems such as roof not collapsing, gas exceeding the limit, roof accidents, etc., to solve safety threats , reduce the possibility, the effect of simple construction

Inactive Publication Date: 2017-10-20
LYUSHUIDONG COAL MINE OF SICHUAN HUAYINGSHAN COALIND
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Problems solved by technology

[0002] For the coal mining face of the steeply inclined medium-thick coal seam adopting the longwall retreating comprehensive mechanized coal mining method, the goaf treatment usually adopts the whole caving method to manage the roof. The middle and lower parts are fuller filled to form a cushion layer. In the goaf at the upper corner, the roof does not collapse, and the distance of the suspended roof exceeds th

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  • Treatment method for upper corner suspension roof of heavy pitch fully mechanized mining coalface
  • Treatment method for upper corner suspension roof of heavy pitch fully mechanized mining coalface
  • Treatment method for upper corner suspension roof of heavy pitch fully mechanized mining coalface

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[0017] The present invention will be further described below in conjunction with the drawings, but the present invention is not limited to the scope of the described embodiments.

[0018] See figure 1 , figure 2 , image 3 , Figure 4 , A method for the treatment of the upper corner and suspended roof of a steeply inclined fully mechanized mining face is mainly composed of forced caving drilling (5), hydraulic fracturing drilling (6), and advanced presplitting blasting drilling (7). Intensive support for cutting roof in coal working face (4) Arrange two rows of forced caving boreholes (5) along the inclination, and arrange a row of advanced pre-splitting along the strike direction in the air tunnel of coal mining face (1) Advance support (2) Blast drilling (7), and arrange hydraulic fracture drilling (6) between the end support (3) and the air tunnel (1) advanced support (2) on the coal mining face.

[0019] In this embodiment, the forced top caving borehole (5) is arranged close...

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Abstract

The invention discloses a method for controlling the corner suspended roof of a steeply inclined fully mechanized mining face, which is mainly composed of forced caving drilling, hydraulic fracturing drilling, and advanced pre-splitting blasting drilling. Two rows of forced caving drill holes are arranged along the direction of the support, and a row of advanced pre-splitting blasting drill holes are arranged along the strike direction in the wind tunnel advance support of the coal mining face. Hydraulic fracturing boreholes are arranged in between. The structure is easy to construct, which destroys the integrity of the roof of the goaf in the coal mining face, releases and weakens the pressure of the roof in the advance support section, and can timely collapse the suspended roof of the goaf in the upper corner, reducing the risk of large-scale collapse of the suspended roof. The possibility of gas exceeding the limit is eliminated, and the safety threat caused by the large overhanging area of ​​the upper corner of the steeply inclined fully mechanized mining face to mine gas control and roof management is very effective.

Description

technical field [0001] The invention belongs to the field of coal mine mining safety, and in particular relates to a method for controlling a corner suspended roof on a steeply inclined fully mechanized mining face. Background technique [0002] For the coal mining face of the steeply inclined medium-thick coal seam adopting the longwall retreating comprehensive mechanized coal mining method, the goaf treatment usually adopts the whole caving method to manage the roof. The middle and lower part of the goaf are filled with fullness to form a cushion layer. In the goaf at the upper corner, the roof does not collapse, and the distance of the suspended roof exceeds the operating regulations. The pressure on the outlet support on the coal mining face and the advanced support section of the wind tunnel is obvious, and the deformation of the roadway support is serious, which can easily induce roof accidents. Injuring people, pushing out the corner gas in the goaf, causing the gas ...

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Application Information

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IPC IPC(8): E21B7/00E21C37/12E21C41/18E21D20/00
CPCE21B7/007E21C37/12E21C41/18E21D20/003
Inventor 周忠国殷绍林刘建程长勇简学才周峧洋刘安福蒋文荣张海涛
Owner LYUSHUIDONG COAL MINE OF SICHUAN HUAYINGSHAN COALIND
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