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Method for preventing roadway impact ground pressure through hydraulic roof cutting and roadway leaving

A technology of rock burst and roof cutting, which is applied in ground mining, earthwork drilling, underground mining, etc., can solve the problems of coal pillar stress concentration and aggravate the risk of rock burst, so as to reduce roadway engineering, reduce resource loss, Significant effect of social and economic benefits

Active Publication Date: 2019-08-20
TIANDI SCI & TECH CO LTD
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  • Summary
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Problems solved by technology

At the same time, in order to isolate the goaf, it is necessary to leave a certain width of coal pillars between the goaf and the goaf. When the coal pillars are unreasonable, it is easy to cause the stress concentration of the coal pillars, which further aggravates the risk of rock burst

Method used

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  • Method for preventing roadway impact ground pressure through hydraulic roof cutting and roadway leaving
  • Method for preventing roadway impact ground pressure through hydraulic roof cutting and roadway leaving
  • Method for preventing roadway impact ground pressure through hydraulic roof cutting and roadway leaving

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Embodiment Construction

[0023] see figure 1 According to the embodiment of the present invention, a method for preventing roadway rock burst by hydraulically cutting the roof and retaining the roadway includes the following steps:

[0024] Excavate the roadway to delineate the mining area of ​​the working face: excavate the transportation roadway, air return roadway and cutting hole respectively. During the excavation, the roof of the transportation roadway needs to be reinforced with strong anchor cables. Wherein, the working face is an area surrounded by a transport lane, an air return lane, a cutting hole and a production stop line, and this area is used for mining of coal resources. The transport lane and return air lane refer to the lanes used for transport and air return during the mining of the working face, the transport lane is the lower lane, and the return air lane is the upper lane. Wherein, the strong anchor cable is a prestressed steel strand whose outer end is fixed on the roadway sur...

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Abstract

The invention provides a method for preventing roadway impact ground pressure through hydraulic roof cutting and roadway leaving. The method comprises main steps of tunneling of a roadway to circle out a working surface mining area, vertical drilling in the roadway, placement and direction adjustment of an ejector, oriented hydraulic gap cutting, and use of the roadway after gap cutting and roof cutting as an air return way of a next working surface. The method for preventing the roadway impact ground pressure through hydraulic roof cutting and roadway leaving can reduce the roadway tunnelingand maintenance workload, reduces the coal resource loss, and achieves important significance on control of the airport roadway mine pressure, in particular the impact ground pressure disaster.

Description

technical field [0001] The invention relates to the technical field of coal mine safety mining, in particular to a method for preventing roadway rock burst by hydraulic roof cutting and retaining roadway. Background technique [0002] Rock burst is one of the main types of disasters in coal mines. When rock burst occurs, a large amount of coal rushes out suddenly, which often causes serious damage to roadways, equipment damage, and casualties. According to incomplete statistics, from 2000 to the present, there have been 431 rockburst accidents across the country, with 601 casualties, resulting in huge economic losses and negative social impacts. [0003] Rockburst mainly occurs in the roadway, especially the goaf-side mining roadway. The reason is that the gob-side roadway is inevitably affected by the roof suspension of the lateral goaf, which leads to high roof pressure on the coal near the roadway. At the same time, in order to isolate the goaf, it is necessary to leave ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21B7/18
CPCE21B7/18E21C41/18
Inventor 夏永学徐刚潘俊锋苏波
Owner TIANDI SCI & TECH CO LTD
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