Device and method for supporting downhole surrounding rock faults

A supporting device and fault technology, which is applied in shaft equipment, shaft lining, underground chambers, etc., can solve the problems that cannot meet the stability requirements of surrounding rocks, and achieve the effect of improving self-supporting capacity and stability, and increasing filling radius

Inactive Publication Date: 2016-09-07
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

In view of the influence of the caving zone, crack zone and overall bending zone of the overlying strata in the fault zone on the stability of the surrounding rock, when the displacement of the fault surrounding rock is serious and the compressive stress is concentrated, the above support methods cannot meet the requirements of the surrounding rock in the fault zone of the coal seam roadway. Stability requirements

Method used

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  • Device and method for supporting downhole surrounding rock faults
  • Device and method for supporting downhole surrounding rock faults
  • Device and method for supporting downhole surrounding rock faults

Examples

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Embodiment Construction

[0038] A kind of downhole surrounding rock fault support device and support method of the present invention are realized in this way, further elaborated below:

[0039] 1) Comprehensively use advanced geological exploration and other means to survey the surrounding rock faults, and then arrange advanced drilling, drill holes with a drilling rig on the side wall of the fault roadway, and drill a central hole at the height center position, with a diameter of φ20mm and a depth of 2800mm; the center holes are spaced in pairs 2000mm, the drilling direction of the central hole is perpendicular to the tangent direction of the circumscribed circle of the fault roadway;

[0040] 2) With the center hole as the center, drill support holes. The six support holes are distributed in a regular hexagon around the center hole. The distance between the support holes is 1000mm. The direction of the support hole mentioned above is perpendicular to the tangent direction of the circumscribed circle...

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Abstract

The invention discloses a device and a method for supporting downhole surrounding rock faults. The device and the method are characterized in that three hollow grouting pipes are uniformly distributed on a hollow support, grouting drain holes are respectively formed in the outer surfaces of the three hollow grouting pipes, winding coils are integrally wound on the outer sides of the three hollow grouting pipes and are not allowed to cover the grouting drain holes when wound, a screw-in anchor head is arranged at an end of the hollow support and is connected one ends of the three hollow grouting pipes, a grouting connecting barrel is connected with the other ends of the three hollow grouting pipes, communicating pipes are arranged in the middle of the grouting connecting barrel, a base plate is arranged on the communicating pipes, an anode pole sequentially penetrates the base plate and the communicating pipes and is arranged in the hollow support, and a protecting bag sleeves the three hollow grouting pipes. The device and the method have the advantages that the device and the method are used for supporting the downhole surrounding rock faults and crack, coal seam roadway surrounding rock of the faults can be supported by the aid of alternating-current electric fields, and the integrity and the self-bearing capacity of the surrounding rock of fault zones can be effectively improved.

Description

technical field [0001] The invention relates to an underground surrounding rock fault supporting device and a supporting method, which relate to a supporting device and a supporting method used for supporting underground surrounding rock fault fissures, and belong to the technical field of surrounding rock supporting. In particular, it relates to a supporting device and a supporting method which can use an alternating current electric field to support the surrounding rock of a coal seam roadway in a fault, and can effectively improve the integrity and self-bearing capacity of the surrounding rock in the fault area. Background technique [0002] When coal mine resources are integrated, the restructured mine is often composed of multiple small coal kilns. After the first mining of the small coal kilns, the balance of the original rock force is destroyed, and the stress of the original rock in the goaf changes. In order to find a new force balance point And redistribution, when...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/10
CPCE21D11/006E21D11/105E21D11/107
Inventor 江东海王同旭马文强蒋子龙曲孔典张恒宋学峰
Owner SHANDONG UNIV OF SCI & TECH
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