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Electro-osmosis home position modified roadway anchoring method of underground swelling soft rock

A technology of in-situ modification and anchoring method, which is applied in earth-moving drilling, installation of bolts, mining equipment, etc., can solve the problem of neglecting the strength of surrounding rock, and achieve the effect of ensuring the excavation efficiency, simple construction process and reducing water content.

Active Publication Date: 2014-01-01
SHANDONG UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

The above-mentioned soft rock roadway support technology has played a certain role in soft rock roadway. They are relatively mature and widely used technologies, but they are all technical work on the support system, ignoring the strength of the surrounding rock itself.

Method used

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  • Electro-osmosis home position modified roadway anchoring method of underground swelling soft rock
  • Electro-osmosis home position modified roadway anchoring method of underground swelling soft rock

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Embodiment Construction

[0025] The technical scheme of the present invention is further described with reference to the accompanying drawings.

[0026] A roadway anchoring method for in-situ modified electroosmotic method of underground expansive soft rock, the technical scheme of which is:

[0027] The first step is to carry out conventional spraying and hanging net spraying to seal the surrounding rock on the excavated roadway. The thickness of the spraying layer 1 is 30-50mm to prevent the surrounding rock from further absorbing water and softening;

[0028] In the second step, according to the design requirements, drilling holes 2 are drilled on the roadway section for anchor support, and the conductive steel pipes 4 and anchor rods 3 are alternately arranged in each drill hole 2, from figure 1 It can be seen from the figure that the alternate arrangement means: the bolt 3 is arranged in one borehole, and the conductive steel pipe 4 is arranged in the adjacent borehole; when the conductive steel ...

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Abstract

The invention discloses an electro-osmosis home position modified roadway anchoring method of underground swelling soft rock. The method includes the steps that first, shotcrete support is timely conducted on surrounding rock of a soft rock roadway, and further water absorption softening of the surrounding rock is prevented; anchor bolt support is conducted on the closed soft rock on the rear portion of a working face, with the aid of electro-osmosis drainage, the moisture content of weak surrounding rock is lowered, and home position strength is maintained; then, moisture containing soft rock is reinforced through the joint action of grouting crack plugging and bolt-grouting supporting, and the roadway can be kept to be in a steady state for a long time. According to the electro-osmosis home position modified roadway anchoring method of the underground swelling soft rock, the reinforcement of the moisture containing soft rock is achieved through the joint action of electro-osmosis drainage, guniting, anchor rods and bolt-grouting supporting, an effective technical method for reducing the moisture content of low-permeability soft rock is achieved, and meanwhile the drivage efficiency of soft rock engineering can be guaranteed.

Description

technical field [0001] The invention relates to a method for reinforcing the surrounding rock of a roadway, in particular to a method for anchoring an underground water-containing soft rock roadway. Background technique [0002] Soft rock is called soft rock formation, which has physical and mechanical properties such as strong expansion, easy disturbance, and easy disintegration. Soft rock is relatively complete and hard in its natural state, and has good mechanical properties. It swells, disintegrates and softens rapidly after being exposed to water in a short period of time, and various mechanical strength indicators continue to decrease with the increase of water content and the extension of water saturation time. [0003] With the continuous increase in the depth of resource mining, there are more and more cases of crossing weak and broken rock formations in major projects such as metallurgical mine roadways, hydropower station chambers, and coal mine roadways, which ha...

Claims

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Application Information

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IPC IPC(8): E21D20/00
Inventor 赵同彬赵志刚张振全宋璐璐房凯
Owner SHANDONG UNIV OF SCI & TECH
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