Segmented Grouting System and Technology for Remote Sealing in Deep and Long Non-linear Boreholes
A segmented grouting, non-linear technology, used in earthwork drilling, wellbore lining, tunnel lining, etc., can solve the problems of difficult segmented grouting, heavy re-drilling workload, and drilling deflection.
Active Publication Date: 2016-08-31
SHANDONG ENERGY GRP
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[0021] An iron mine is a typical metal mine with heavy water, and the daily water inflow of the mine is more than 40,000 m 3 / d, the eastern ore body is a skarn-type iron deposit, and the reserves submitted by geological exploration are 3.34 million tons. In the mining area, marble and igneous rocks are interspersed violently, and karstification is intense, and the main karst forms are dissolved fractures and dissolved tubes. The dominant water-bearing structures in the mining area are karst pipes, karst fissures, and fault structures connected to the aquifer. When implementing water inrush prevention in the -300m horizontal excavation of the mine, in order to avoid the drilling deviation caused by a large number of re-drilling and re-drilling, segmented grouting was used. The anti-slurry device is difficult to install. Therefore apply the segmented grouting system and technology for deep and long nonlinear drilling designed by the present invention, and its specific impleme...
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The invention relates to a deep and long nonlinear drilling downhole remote hole sealing sectional grouting system for preventing and controlling water inrush and a deep and long nonlinear drilling downhole remote hole sealing sectional grouting process. The system comprises first and second grouting casing pipes (6 and 7), first and second gate valves (1 and 2) and a rear cover (8) which are connected with the first and second grouting casing pipes (6 and 7), a first ball valve (4) which is connected with a solidified slurry pipeline (10) and a second ball valve (3) which is connected with a non-solidified pressure maintaining slurry pipeline (9), wherein a bullet type slurry stopping body (5) is prearranged in the casing pipe between the first and second gate valves (1 and 2); after sectional grouting is finished, the first ball valve (4) is turned off; the first and second gate valves (1 and 2) are turned on, non-solidified pressure maintaining slurry is injected by the second ball valve (3), the bullet type slurry stopping body (5) which is prearranged in the first grouting casing pipe (6) is pushed to the preset grouting solidification position by utilizing the non-solidified pressure maintaining slurry, and the second gate valve (2) is turned off; and when the solidification strength of the slurry meets the requirements of projects, the second gate valve (2) is turned on, so that the non-solidified pressure maintaining slurry in drilling holes is discharged. Therefore, by the system and the process, the integral drilling holes are prevented from being sealed by the solidified slurry, repeated drilling is avoided, and the deflection of the drilling holes caused by multi-time repeated drilling is avoided.
Description
technical field [0001] The invention relates to a segmented grouting system and process for long-distance sealing of deep and long nonlinear boreholes, which is mainly used in the prevention and control of water inrush disasters in mines, tunnels, water conservancy and hydropower and other underground projects. Background technique [0002] At present, when grouting prevents water inrush disasters and blocks the water guide channel, conventional drilling rig drilling and grouting is usually used. The grouting method is mostly full-hole grouting, and the amount of re-drilling is large. The amount of re-drilling will be larger when the kilometer directional drilling rig is used for construction, and the drilling deviation will easily be caused during the re-drilling process. Because the drilling is nonlinear, the traditional full-hole grouting method is difficult to apply to deep and long Nonlinear Borehole Grouting. In view of the above problems, the present invention disclo...
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IPC IPC(8): E21D11/38
Inventor 翟明华李术才卜昌森孙春江李伟郭信山刘人太
Owner SHANDONG ENERGY GRP