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Grouting method of microcrack rock mass

A fractured rock mass and fine technology, which is applied in earth-moving drilling, wellbore lining, tunnel lining, etc., can solve the problems of limited slurry diffusion range, high flow effect, increased grouting pressure, etc., and achieves good perfusion effect and good flow. The effect of improving the water blocking rate

Active Publication Date: 2019-04-26
安徽马钢矿业资源集团姑山矿业有限公司 +1
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AI Technical Summary

Problems solved by technology

[0002] In the roadway excavation of the mine, the shallow hole grouting method is adopted for the general micro-fissure water and loose water. grout holes, and increase the grouting pressure, but the above grouting grout seals the main water flow or larger fissure water, and the plugging effect on micro fissure water under extremely complex hydrogeological conditions is not obvious
After experiments and analysis, it is concluded that ordinary Portland cement slurry has a high particle size and poor flow effect for sealing micro-cracks, and the perfusion is not good; cement water glass double liquid slurry has coarse cement particles, short cementation time, and limited slurry diffusion range. , can not block micro-fissure water; chemical slurry has low strength, poor pressure resistance, short duration, high toxicity and high cost; composite ultra-fine cement slurry has high technical requirements and high cost

Method used

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  • Grouting method of microcrack rock mass
  • Grouting method of microcrack rock mass
  • Grouting method of microcrack rock mass

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as Figure 1 to Figure 3 As shown, a grouting method for micro-cracked rock mass specifically includes the following steps:

[0028] Step 1: Position, fix and orient the drilling rig for construction;

[0029] Step 2: Carry out the first section of drilling construction to form the first sequence hole 1, and fix the grouting pipe 3 with a diameter of 32mm in the first sequence hole 1 with cement water glass double slurry by increasing the grouting pressure;

[0030] Step 3: adapting bentonite cement and ordinary Portland cement to prepare grout;

[0031] Step 4: inject the prepared grouting slurry into the grouting pipe 3;

[0032] Step 5: Sweep the hole for re-injection and check the grouting situation;

[0033] Step 6: After the grouting of the first sequence hole 1 is completed, the second section of drilling is carried out to form the second sequence hole 2, and then the water pressure and grouting construction are carried out;

[0034] Step 7: Check whethe...

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Abstract

The invention belongs to the technical field of underground mines, and particularly relates to a grouting method of a microcrack rock mass. According to the grouting method, bentonite and ordinary Portland cement are made into grouting slurry according to a ratio, and by putting proper pumping pressure to inject the prepared grouting slurry into drill holes, a sealing effect is achieved. The bentonite slurry has the advantages of fine particles, diffusivity, good stability and the like, but is low in consolidating strength and week in osmotic pressure resistance and erosiveness resistance, however, slurry of the ordinary Portland cement has good groutability and mobility, therefore, the grouting slurry prepared by combining the bentonite and the slurry of the ordinary Portland cement has agood grouting effect on microcracks in strata with complex hydrogeological conditions, the water-plugging efficiency of the microcracks is greatly improved, and the cost is reduced.

Description

Technical field: [0001] The invention belongs to the technical field of water prevention and control in mines, and in particular relates to a grouting method for micro-fissure rock mass. Background technique: [0002] In the roadway excavation of the mine, the shallow hole grouting method is adopted for the general fine crack water and loose water. grouting holes, and increase the grouting pressure, but the above-mentioned grouting grout seals the main water flow or larger fissure water, and the plugging effect on micro fissure water under extremely complex hydrogeological conditions is not obvious. After experiments and analysis, it is concluded that ordinary Portland cement slurry has high particle size and poor flow effect for sealing micro-cracks, and poor perfusion; cement water glass double liquid slurry has coarse cement particles, short cementation time, and limited slurry diffusion range. , can not block micro-fissure water; chemical slurry has low strength, poor p...

Claims

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Application Information

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IPC IPC(8): E21D11/38E21B33/13
CPCE21B33/13E21D11/38
Inventor 陈轲郝洪声孙茂贵
Owner 安徽马钢矿业资源集团姑山矿业有限公司
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