Device and method for multi-stage plugging of surrounding rock fissure water by utilizing slurry and microbial mineralization
A microorganism and fissure water technology, applied in chemical instruments and methods, mining equipment, earthwork drilling, etc., can solve the problems that small-scale and micro-scale fissures cannot be effectively blocked, large-flow fissure water is not suitable, and slurry viscosity is high.
Active Publication Date: 2021-05-28
HENAN POLYTECHNIC UNIV +1
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However, this method uses a single borehole for grouting plugging, and the plugging range is small. Due to the large particle size of the slurry and the high viscosity of the slurry, it cannot effectively plug small-scale and micro-scale cracks.
And it is not suitable for the plugging of large flow fissure water
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[0044] As shown in the figure, a device for multi-stage sealing of surrounding rock fissure water using grout and microbial mineralization, including a plugging component set in the key grouting hole 3 and a water-stop drilling hole respectively set in the annular water-stop curtain The second plugging component in 4, the annular water-stop curtain includes six annular water-stop boreholes 4 that are uniformly radially arranged with the key grouting hole 3 as the center and a radius of 0.8-1.5m. Blocking assembly one includes the anchor rod 5 positioned at the center of the key grouting hole 3, and the first drilling plug 6 at the opening of the key grouting hole 3 at the end of the anchor rod 5, and the first drilling plug 6 is provided with There are one 8 channels of grouting pipeline and three 9 channels of bacteria injection pipeline, the first 8 of grouting pipeline and the third 9 of bacteria injection pipeline respectively extend inwards to the bottom of key grouting ho...
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The invention belongs to the technical field of underground engineering plugging, and particularly discloses a device and a method for multi-stage plugging of surrounding rock fissure water by utilizing slurry and microbial mineralization. According to the device, microbial dry powder is activated and then induced to generate calcium carbonate deposition with cementing property so as to plug rock stratum fissures, the flow of the fissure water is controlled, and the stability of surrounding rock is enhanced. The device is composed of annular waterproof curtain plugging and key hole grouting plugging, wherein annular waterproof curtains are circularly and uniformly distributed on the periphery of key holes, the flow speed and the flow of the fissure water are reduced by injecting cement-water glass slurry into annular grouting holes, and primary plugging of centimeter-level surrounding rock fissures is carried out; and the key hole grouting plugging adopts coarse aggregate and microbial-induced calcium carbonate precipitation to carry out secondary plugging on millimeter-level fissures in the surrounding rock fissures, the microbial dry powder is activated and then induces the calcium carbonate precipitation to plug micron-level fissures in the surrounding rock so as to carry out third-level plugging, and the plugging effect of the surrounding rock fissures and the curing effect of the surrounding rock are enhanced step by step.
Description
technical field [0001] The invention belongs to the technical field of underground engineering plugging, and in particular relates to a device and method for multi-stage sealing of surrounding rock fissure water by utilizing slurry and microorganism mineralization. Background technique [0002] my country has a vast territory and complex geological conditions. During the construction of underground projects, there are many unfavorable geological conditions such as water-rich karst fissures and broken aqueducts. These unfavorable geological conditions are the root causes of water inrush disasters. Water inrush is a common construction disaster in underground engineering, which can cause delays in the construction period, casualties and serious economic losses. [0003] During roadway construction, in order to solve the inrush water disaster caused by fissure water, the current main treatment method is grouting plugging. According to the properties of grouting materials, it ca...
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IPC IPC(8): E21B33/13E21B33/03C09K8/506E21D20/00E21D20/02E21D9/00
CPCE21B33/13E21B33/03E21D20/02E21D20/021E21D20/003C09K8/506E21D9/002
Inventor 魏建平刘勇宋晨鹏张宏图徐向宇温志辉姚邦华王登科司磊磊
Owner HENAN POLYTECHNIC UNIV
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