Roadway surrounding rock deformation, rock burst and coal and gas outburst comprehensive treatment method

A technology of surrounding rock deformation and rock pressure impact, which is applied in the field of roadway surrounding rock deformation, comprehensive control of coal and gas outburst, and rock impact rock pressure to achieve the effect of simple construction, good effect and high applicability

Inactive Publication Date: 2015-08-12
CHINA COAL TECH ENG GRP CHONGQING RES INST
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for coordinating the prevention and control measures of various dynamic disasters in view of the reality that multiple dynam

Method used

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  • Roadway surrounding rock deformation, rock burst and coal and gas outburst comprehensive treatment method
  • Roadway surrounding rock deformation, rock burst and coal and gas outburst comprehensive treatment method
  • Roadway surrounding rock deformation, rock burst and coal and gas outburst comprehensive treatment method

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Example Embodiment

[0027] In the following, the specific engineering geology of a certain mine is used to describe the implementation of the present invention specifically:

[0028] In the 11501 working face of a mine, the average mining depth exceeds 900m, the thickness of the coal seam is 0.66~2.27m, the average is 1.59m, the inclination is 0~9°, the average is 5°, the coal seam is stable, and the floor and roof are excavated during the driving process of the two roadways Rock formations. It has been evaluated that the working face has multiple dynamic disasters such as large deformation of roadway surrounding rock, rock burst, coal and gas outburst, and a comprehensive treatment method for roadway surrounding rock deformation, rock burst, coal and gas outburst provided by the present invention is adopted, and the specific steps are as follows:

[0029] 1. The use of anchor-net-cable active support technology strengthens the strength of the surrounding rock, improves its self-supporting capacity, ...

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Abstract

The invention relates to a roadway surrounding rock deformation, rock burst and coal and gas outburst comprehensive treatment method. The method is based on the intensity enhancing effect of active support of a rock bolt on a surrounding rock body, the weakening, pressure relief and rock burst prevention and treatment effects of large-diameter drill holes on a coal body, and the capability of a gas drainage system to effectively reduce the gas content of a coal seam. First, a rock bolt active support technology is adopted in the two roadways of a working face to enhance the intensity of surrounding rock; then, large-diameter pressure relief boreholes are machined every 3-3.5 meters among rock bolts, and the large-diameter pressure relief boreholes are sealed; and gas drainage boreholes are machined at regular intervals to drain gas in a coal seam. The rock bolt support structure and large-diameter borehole sealing jointly form a roadway surrounding rock reinforcing area, which can effectively control roadway deformation and maintain the working space. The reinforcing area, a weakening area and a drainage area formed by the method of the invention can effectively prevent and treat large deformation of roadways, rock burst, coal and gas outburst and other deep mine dynamic disasters, and provides safeguard for the safety production of mines.

Description

technical field [0001] The invention relates to a comprehensive treatment method for roadway surrounding rock deformation, rock burst, and coal and gas outburst, in particular to a comprehensive treatment method for coupling and coexistence of multiple dynamic disasters in deep mine working faces. Background technique [0002] With the development of my country's national economy, the demand for energy is increasing day by day. As the main component of my country's energy structure, coal mining intensity is gradually increasing. In recent years, a large number of mine mining activities have entered deep areas, and disasters that did not occur in shallow mining activities have emerged one by one, such as rock bursts and large deformations of soft rocks. At the same time, there is also the phenomenon that multiple dynamic disasters are coupled and coexist in the same working face, and various dynamic disasters are induced and promoted each other, which further deteriorates the...

Claims

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Application Information

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IPC IPC(8): E21D20/00E21F7/00
CPCE21B33/13E21D20/00E21F7/00
Inventor 王浩易恩兵
Owner CHINA COAL TECH ENG GRP CHONGQING RES INST
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