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Water plugging method suitable for shallow earth surface large-open-degree fractured rock mass roadway

A technology with large openings on the surface and cracked rock mass, applied in tunnels, tunnel linings, underground chambers, etc., can solve problems such as unsatisfactory engineering requirements, fractured rock mass instability, equipment submersion, etc., to reduce flood disasters, The effect of ensuring mine safety and improving mechanical properties

Inactive Publication Date: 2019-12-20
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the joint action of engineering disturbance, surrounding rock quality degradation, seepage pressure, etc., the internal fissures of the fractured rock mass will continue to expand and penetrate, which will eventually lead to the fracture and instability of the fractured rock mass, and cause disasters such as underground stopes, equipment submersion, and water inrush. The traditional roadway grouting water blocking method cannot meet the engineering needs

Method used

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  • Water plugging method suitable for shallow earth surface large-open-degree fractured rock mass roadway
  • Water plugging method suitable for shallow earth surface large-open-degree fractured rock mass roadway
  • Water plugging method suitable for shallow earth surface large-open-degree fractured rock mass roadway

Examples

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Effect test

Embodiment 1

[0048] A water plugging method suitable for rock mass tunnels with large openings on the shallow surface, characterized by comprising the following steps:

[0049] 1) Selection of dry soybean particle size: After grinding the dry soybean into particles, the particle size of the dry soybean is selected according to the bonding degree of the fissure rock mass fissure. After investigation, the rock mass in the roadway is a rock mass with an average bonding degree. According to The combined degree of the cracks in the fractured rock mass is selected as the particle size of dry soybean particles is 14 mesh, accounting for 20%, 18 mesh accounting for 30%, and 20 mesh accounting for 50%.

[0050] 2) Grouting material and ratio: The grouting material is cement-water glass, and water and quick-setting agent are added, and the ratio of water, cement and water glass is 0.8:1:0.75. The quick-setting agent accounts for water, cement and water 2% of the total glass.

[0051] 3) Determinati...

Embodiment 2

[0069] A water plugging method suitable for rock mass tunnels with large openings on the shallow surface, characterized by comprising the following steps:

[0070] 1) Selection of dry soybean particle size: According to the survey results, the fracture bonding degree of the rock mass in this area is poor, so the particle size of dry soybean particles is selected as 12 mesh, 10%, 14 mesh, 22%, 18 mesh, 30%, 20 mesh accounts for 38%;

[0071] 2) Grouting material and ratio: The grouting material is cement-water glass, and water and quick-setting agent are added, and the ratio of water, cement and water glass is 0.8:1:0.75, and the quick-setting agent accounts for water, cement and 3.5% of the total amount of water glass.

[0072] 3) Determination of grouting parameters: grouting parameters include grouting pressure, diffusion radius and theoretical injection volume;

[0073] The grouting pressure value is determined according to the following formula:

[0074]

[0075] In ...

Embodiment 3

[0090] A water plugging method suitable for rock mass tunnels with large openings on the shallow surface, characterized by comprising the following steps:

[0091] 1) Selection of dry soybean particle size: According to the survey results, the fracture bonding degree of the rock mass in this area is very poor, so the particle size of dry soybean is selected as 12 mesh, 8%, 14 mesh, 18%, 18 mesh, 32%, and 20 mesh. accounted for 42%;

[0092] 2) Grouting material and ratio: The grouting material is cement-water glass, and water and quick-setting agent are added, and the ratio of water, cement and water glass is 0.8:1:0.75. The quick-setting agent accounts for water, cement and water 6% of the total glass.

[0093] 3) Determination of grouting parameters: grouting parameters include grouting pressure, diffusion radius and injection volume;

[0094] The grouting pressure value is determined according to the following formula:

[0095]

[0096] In this example, the surface el...

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Abstract

The invention belongs to the technical field of roadway water plugging and discloses a water plugging method suitable for a shallow earth surface large-open-degree fractured rock mass roadway. In order to solve problems existing in roadway water plugging modes in the prior art, the water plugging method comprises grain size selection of dry soybeans, grouting material preparation and matching, determination of grouting parameters, roadway drilling, grouting and other steps. According to the water plugging method, with the good physical property of water absorption expansion, the dry soybeans serve as coarse aggregate for water plugging to plug a large-open-degree fractured rock mass water diversion channel. Under the action of water flow of the water diversion channel, mud, calcium, rock debris and other filings put in fractures in a fractured rock mass are dissolved and flow out of the rock mass along with seepage water, meanwhile the fillings are combined with cement-sodium silicategrouting materials, the quick reaction capability and forming of a large amount of silica gel are utilized, the materials and the soybean coarse aggregate form a concrete-like structure, coarse and fine aggregate are matched, and a fast water stop effect is achieved on the large-open-degree fractured rock mass roadway in a shallow earth surface water-rich area.

Description

technical field [0001] The invention relates to the technical field of roadway water plugging, in particular to a water plugging method suitable for rock mass roadways with large openings on shallow ground surfaces. Background technique [0002] The roadway is the communication channel between the surface and the ore body. It is used for ventilation, pedestrians, ore transportation, etc. It is an important channel project in the mine. The surrounding rock, stress environment, and hydrological environment of the roadway affect its stability. On the shallow surface, the roadway is in a low ground stress environment, so the quality of the surrounding rock and the hydrological environment are important factors affecting the stability of the shallow surface roadway. [0003] Due to geological action, the rock mass is cut by structural planes such as various faults and fissures, and its integrity is destroyed; the size, opening, density, direction and distribution of the fissures...

Claims

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Application Information

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IPC IPC(8): E21B33/13E21D11/38
CPCE21B33/13E21D11/38
Inventor 高忠赵文奇何良军郝显福张亭王忠泉柴衡山焦满岱刘财林吕斌张兰生张恒飞
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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