Penetrating tunnel ground boring casing pipe sealing apparatus and operation technology for same
An operation process and a technology for penetrating roadways, which are applied in the field of casing sealing devices for drilling through roadways on the ground, can solve the problems of safety problems, waste of economy and time, and dare not to construct drill holes through roadways.
Active Publication Date: 2015-12-09
SHANDONG UNIV
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Problems solved by technology
The emergence of the above problems makes it difficult for the drilled holes to work normally or even be scrapped, which seriously affects the normal production of the coal mine and even threatens the safety of the coal mine because the groundwater is too late to be discharged.
[0004] In order to avoid the above problems, some construction units do not dare to drill through the roadway, but drill on the ground to the same level as the roadway, and then open up a new roadway to find the drill hole, which not only causes a lot of waste of money and time , there are also safety issues when developing roadways
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Embodiment 1
[0056] In order to solve the problem of water gushing in the underground Ordovician limestone and Xujiazhuang limestone, Chazhuang Mine constructed two tunnel drainage boreholes 4, respectively Chazhuang Mine 2004 Row 1 and Chazhuang Mine 2004 Row 2. The basic situation of borehole 4 is as follows: borehole 4 is constructed on the ground, and the depth of the final hole is located in the 8th floor roadway, with a depth of 352m. The structure of the borehole 4 is as follows: the primary aperture is Φ550mm, the depth is 70m, and the Φ450mm casing 3 is lowered to isolate the Quaternary and the topsoil layer; Φ273mm drainage steel pipe is lowered as the casing 3 in the hole. The casing 3 is directly lowered into the 8-layer coal roadway in the borehole 4 and is located on the siltstone of the roadway floor. During the construction of borehole 4, grouting was carried out to block the water gushing strata encountered respectively. After the borehole 4 was drilled through the roadwa...
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The invention discloses a penetrating tunnel ground boring casing pipe sealing apparatus and an operation technology for the same. The operation technology works in a way that a casing pipe is placed in a tunnel drilling hole; a drilling hole slip-casting thin pipe is paved on one side of the casing pipe; the drilling hole slip-casting thin pipe and the casing pipe are placed into the drilling hole together; a first slip-casting thin pipe (I) and a second slip-casting thin pipe (II) are placed between a tunnel top plate casing pipe and hole walls on two sides; slurry sealing material is introduced layer by layer to an annular gap formed between a drill hole wall of the tunnel top plate and the casing pipe to form a first slurry induration sealing layer (I) and a second slurry induration sealing layer (II); and a drilling hole casing pipe slurry sealing body is poured to the second slurry induration sealing layer (II). Loss of slurry injected into the drill hole due to failure of slurry sealing for the tunnel top plate drill hole can be prevented, so casing pipe crack due to casing pipe suspension and shake can be prevented when the casing pipe is not fixed by sealing material; corrosion of the casing pipe upon exposure to the air and immersion in the water due to slurry loss can be avoided; and drilling hole scrap due to slurry sealing failure can be prevented.
Description
technical field [0001] The invention relates to the fields of water prevention and control in coal mines and drilling construction of coal well infrastructure projects, in particular to a casing sealing device for drilling through roadway ground and a safe operation process thereof. Background technique [0002] For large water mining areas that are seriously threatened by groundwater, drainage and pressure reduction of high-pressure aquifers that threaten coal seam mining are often used as one of the main means of water damage control. A certain number of drainage boreholes need to be constructed. The drainage system connected with the drainage casing in the underground roadway drains the groundwater stored in the underground water tank to the ground. At this time, the drilling casing plays the role of a drainage pipe; sometimes in order to meet the needs of grouting reconstruction of the underground working face, Construct a certain number of grouting drilling holes on the...
Claims
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IPC IPC(8): E21D11/10E21D11/38E21B33/13
Inventor 潘光明张庆松李术才林春金孙立新邱法林潘东懿杨腾
Owner SHANDONG UNIV