Annular filling method for space between freezing pipe and surrounding rock

A technology for freezing pipes and surrounding rocks, which is applied in earthwork drilling, shaft equipment, mining equipment, etc. It can solve problems such as collusion and flooding accidents, and achieve the effects of short construction period, simple process and low cost

Inactive Publication Date: 2008-07-23
HANDAN SPECIAL SHAFT SINKING CHINA COAL ENERGY GROUP
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Problems solved by technology

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a method for annular filling between the frozen pipe and the surrounding rock, wh

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  • Annular filling method for space between freezing pipe and surrounding rock

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Embodiment Construction

[0011] The present invention comprises the following steps: (1), the preparation of cement slurry 5: 1., raw material is cement (P.032.5), water, clay or bentonite, retarder, alkali powder, amine powder, nitrile powder, and water: cement is 1:0.5~1:1; the amount of clay or bentonite is 5%-10% of the cement amount; the retarder uses GK-4A high-efficiency retarding water reducer, which is 2.5%-3% of the cement amount, alkali powder, amine Powder and nitrile powder are 1% of the cement consumption, and the above are weight ratios; ②, pour the raw materials into the stirring tank 1 according to the stated ratio and stir for 2-10 minutes, and put them into the slurry storage tank 3 after stirring evenly ; (2) Filling method: ① After the final hole of the frozen hole, adjust the clay slurry in the frozen hole until the specific gravity of the clay slurry flowing out from the frozen hole is 1.05-1.15g / cm 3 When the time stops, the performance of the clay slurry is: specific gravity 1...

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Abstract

The invention relates to an annular filling method between freezing pipes and surrounding rocks, comprising the preparation of cement slurry and the filling method. In the procedure of preparing cement slurry, the materials, that is, cement, water, clay or bentonite, retarder, alkali powder, amine powder, nitrile powder, are stirred evenly pro rata. The filling method comprises the following steps. The first step is to regulate the clay slurry inside the freezing hole after final hole and to stop when the specific gravity of the clay slurry from the freezing hole is 1.05-1.15g per cubic centimeter. The second step is to bring forward the drilling tool, remove the drill bit, place down the hollow drill rod, start the mud pump, and press the stirred cement slurry inside the slurry storage pool from the mud pump into the bottom of the freezing hole through the drill rod to be replaced by the clay slurry. The dosage of the cement slurry is 3-8m per cubic centimeter every freezing hole. The third step is to draw out the hollow drill rod, place down the freezing pipe, and extrude the cement slurry to fill the annular space between the freezing pipe and the surrounding rock. The annular filling method between freezing pipes and surrounding rocks has the advantage of solving the hidden danger of well submerging accident between the freezing pipes and the surrounding rocks due to transfixion between upper and lower sewage caused by bad filling.

Description

technical field [0001] The invention relates to a method for annular filling between a frozen pipe and surrounding rock. Background technique [0002] At present, in the construction of the whole wellbore using the freezing method, the frozen pipe must pass through the wharf door, water tank, underground parking lot, and connection lanes and other structures constructed in the later stage. The freezing method can be safely excavated and constructed under the protection of the formed frozen wall. . The problem is that when the frozen wall is naturally thawed, a large amount of water and mud and sand in the formation will inevitably flow into the wharf gate and other structures constructed in the later stage through the annular space between the frozen pipe and the surrounding rock. Major accident. For this reason, in the construction of mine shafts, in view of the geological and hydrogeological conditions of complex strata, according to the characteristics of rich water con...

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Application Information

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IPC IPC(8): E21D5/04
Inventor 梁洪振王贤才赵嘉亮高清陈占怀李志清郭永富
Owner HANDAN SPECIAL SHAFT SINKING CHINA COAL ENERGY GROUP
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