Borehole casing pressure-proof seepage sealing grouting device and process for roadway breaking water burst surrounding rock
A grouting device and roadway technology, applied in tunnels, shaft equipment, earthwork drilling and mining, etc., can solve problems such as damage, affecting mine production, disturbing and destroying roadway surrounding rock, etc.
Active Publication Date: 2013-04-24
SHANDONG UNIV
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Problems solved by technology
The reason is that during the grouting operation of casing sealing and grouting in the water-broken rock formation, the grouting pressure will be disturbed and the already broken rock formation will be destroyed, resulting in the deformation of the broken surrounding rock of the roadway, and even flaking and collapse.
Once the rock wall of the roadway breaks down and communicates with the deep high-pressure aquifer, it will cause water gushing or even water inrush in the roadway, which poses a threat to roadway transportation and safety, seriously affects mine production, and increases the cost and pressure of mine water prevention and control.
[0003] Because the surrounding rock of t...
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[0098] A coal mine started construction on October 16, 2005, and started production and operation in March 2010. The designed production capacity is 2.4 million t / a, and the service life is 52.4 years. It is a mine with complex hydrogeological conditions and is seriously threatened by high temperature, high pressure pore water and rock burst. During roadway excavation or working face mining, water inrush often occurs, causing great pressure on mine drainage.
[0099] During the excavation of the roadway up the mountain with the ore belt, a normal fault with a drop of 2.2m was encountered. Since the roof of the roadway is mudstone at the fault, the roof collapsed, and then U-shaped shed was used for multi-layer support, and the roadway was supported by anchor spraying. There is an obvious water gushing point in the footwall of the fault, with a water gushing volume of 30m 3 / h. According to geological radar and borehole detection, the surrounding rock 33 of the roadway was br...
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Abstract
The invention discloses a borehole casing pressure-proof seepage sealing grouting device and process for roadway breaking water burst surrounding rock. The borehole casing pressure-proof seepage sealing grouting device comprises a pressure-proof expansion grouting device and a seepage grouting pipe which are combined together. The invention further discloses a borehole casing pressure-proof seepage sealing grouting process for the roadway breaking water burst surrounding rock. By injecting a rapid hardening consolidation material into the pressure-proof expansion grouting device to enable expansion cloth to be spread and tightly pressed on a borehole wall, disturbance damage to the breaking water burst surrounding rock caused by grouting pressure in the seepage grouting process is avoided, roadway deformation and even collapse caused in the grouting process can be avoided, an open hole section is grouted through the seepage grouting pipe, grouting slurry seeps to water guiding cracks by the grouting pressure, and an annular sealing material protecting ring can be formed in a borehole after a core taking pipe is utilized to take out the pressure-proof expansion grouting device. The protecting ring has the effects of wall protection and water stopping and guarantees sealing quality of a borehole casing.
Description
technical field [0001] The present invention relates to an underground drilling construction process, in particular to a pressure-isolation, penetration, sealing and grouting device and process for drilling casings in broken water gushing surrounding rocks in roadways, belonging to mines, traffic tunnels, water conservancy and hydropower, etc. geological exploration, water disaster prevention, infrastructure and other technical fields. Background technique [0002] In coal mine underground water exploration and drainage and grouting water plugging drilling construction, due to the constraints of underground geology, roadway environment and construction technical scheme, the design position of the drilling opening is often in the water gushing and breaking section of the surrounding rock wall of the roadway. Under this condition, because of the broken water gushing in the surrounding rock of the roadway, it is very difficult to seal the drilling casing, and the sealing failur...
Claims
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Login to view more IPC IPC(8): E21D11/10E21B33/13
Inventor 李术才林春金潘光明张庆松李海燕李召峰杨腾李红伟
Owner SHANDONG UNIV
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