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Crack rock laneway molding control method

A cracked rock mass and control method technology, applied in the field of rock roadway excavation, can solve problems such as poor roadway formation regularity, reduced roadway smooth surface blasting quality, poor stability of roadway surrounding rock, etc., and achieve the effect of improving blasting quality

Inactive Publication Date: 2008-09-10
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of the crack surface, the surrounding blasting cracks cannot be penetrated smoothly, which reduces the quality of smooth blasting of the roadway, makes the formation of the roadway poor, the amount of shotcrete material used is large, and the stability of the surrounding rock of the roadway is poor.

Method used

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  • Crack rock laneway molding control method

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Embodiment Construction

[0007] The method for controlling the formation of cracked rock mass roadway of the present invention, its preferred specific implementation is as follows figure 1 As shown, when peripheral blastholes are arranged on the working face, when the working face encounters a fracture surface, especially a relatively large fracture surface, the angle between the line connecting the two peripheral blastholes on both sides of the fracture surface and the fracture surface is 45 °~90°, may be 60°, 75°, etc., or other angles.

[0008] When laying holes around the perimeter, it is possible to arrange the blastholes symmetrically on both sides of the crack surface as far as possible to ensure the forming effect around the roadway. The symmetrical arrangement mentioned here does not refer to absolute symmetry in mathematics, but refers to the The distance from the blast hole on the side to both sides of the fracture surface is equal.

[0009] The peripheral eyes on both sides of the fractur...

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Abstract

The invention discloses a cranny rock mass laneway forming and control method. A working surface is provided with periphery shot holes. When the working surface has a bigger fissure plane, the included angle between the connecting line of the two periphery shot holes of the two sides of the fissure plane and the fissure plane ranges from 45 degree to 90 degree, and the periphery shot holes on the two sides of the fissure plane are arranged symmetrically and are chiseled in parallel as much as possible. When the detonation is performed, the detonation tier number is increased and the explosive load of the complete section is decreased, particular the explosive load of the single detonation section. Therefore, the effect of smooth surface blasting is greatly improved, the traced hole rate is up to more than 85 percent, the laneway smooth surface blasting quality is improved, the laneway overexcavation quantity is reduced, the laneway forming regularity is guaranteed, the gunning material is reduced and the stability of the laneway rock mass is improved.

Description

technical field [0001] The invention relates to a rock roadway excavation technology, in particular to a method for controlling the formation of a cracked rock mass roadway. Background technique [0002] During rock roadway excavation, when the working face encounters a fissure surface, especially a relatively large fissure surface. Due to the influence of the crack surface, the surrounding blasting cracks cannot be penetrated smoothly, which reduces the blasting quality of the smooth surface of the roadway, makes the formation of the roadway poor in regularity, uses a large amount of shotcrete materials, and poor stability of the surrounding rock of the roadway. Contents of the invention [0003] The object of the present invention is to provide a method for controlling the formation of cracked rock mass roadway when the working face encounters a fissure surface, which can make the surrounding blasting cracks penetrate smoothly and improve the blasting quality of the smoo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D3/04F42D1/02
Inventor 单仁亮高文蛟
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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