A method for advance drying of water-rich rock formation drilling
A rock formation and water-rich technology, applied in the direction of earthwork drilling, mining equipment, tunnels, etc., can solve the problem that the water-rich rock formation cannot be quickly and economically dried in advance, drilling, blasting, support work is difficult, and concrete cannot be used underground Problems such as mining and support, to achieve the effect of improving mining efficiency, increasing labor production efficiency, and improving working conditions
Inactive Publication Date: 2015-08-05
CENT SOUTH UNIV
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Problems solved by technology
The construction process of this patent is complicated and expensive, and it is not suitable for the advanced dehydration of deep underground water-rich ore bodies or large water deposits
To sum up, for water-rich ore bodies or large water deposits, none of the methods and technologies used at home and abroad can quickly and economically realize the advanced dehydration of water-rich rock formations in a large area of the mine.
[0004] The deep phosphate ore body of Kailin Group is affected by the surrounding topography and ore body conditions. During the development, mining and mining of the ore body, a large amount of rock joint fissure water is encountered. Once the working face is exposed, there will be a large amount of water. Emerging from the top state, on the one hand, workers need to wear raincoats and other work, the construction efficiency is low, and the phenomenon of roof caving in stopes and roadways occurs from time to time, and the operation safety is poor; on the other hand, commonly used explosives and shotcrete cannot be used for underground mining It is difficult to carry out drilling, blasting and support work
In addition, the phenomenon of ore mudification has also been caused, and the ore rock is difficult to transport, which has brought great difficulties to the mining of the phosphate ore body in the mine, and the production has been seriously hindered. Therefore, the mine urgently needs to solve the advanced dehydration of the deep phosphate ore body
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[0018] In the water-rich rock strata, arrange a drainage borehole in a plane range of 10m~30m×10m~30m. The diameter of the drainage borehole is 150mm~300mm, and the orientation is 60°~90° downward from the horizontal plane. The drainage borehole adopts a raised well The drilling rig or geological drilling rig drills from the upper roadway to the deep water-rich rock formation and drills in advance, with a length of 10m to 100m. Using the joints and fissures existing in the water-rich rock formation itself, the water seepage existing in the rock formation is enriched into the drainage borehole under the action of natural pressure difference, and the water in the hole is discharged by the submersible pump arranged in the bottom of the drainage borehole. Connect the plastic drainage pipe and suspend it with a steel rope into the borehole 0.5-1.0m away from the bottom of the drain hole. The plastic drain pipe and steel rope are extended to the mouth of the drain hole and tied to th...
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The invention discloses an advanced drainage method by the aid of drilled holes for water-rich rock strata. The advanced drainage method is characterized in that the advanced drainage drilled holes are formed in a water-rich rock stratum according to a certain density, water inside the rock stratum seeps and is gathered in the drainage drilled holes by the aid of joint fissures of the water-rich rock stratum under the effect of natural pressure difference, the water in the drainage drilled holes is drained by submersible pumps arranged at the bottoms of the drainage drilled holes, natural pressure difference is formed again, water in the water-rich rock stratum is gathered and drained, and the same procedure is repeated until an advanced quick drainage effect is realized for an ore deposit. The advanced drainage method has the advantages that advanced drainage is performed on the water-rich rock stratum by the aid of underground engineering, the method is high in speed and efficiency and low in investment and cost, a labor condition can be improved, water inrush accidents are effectively prevented, the labor production efficiency is improved, a damage effect due to high pressure of the underground water is eliminated, the strength of construction rock is improved, an engineering support load is reduced, and earth pressure disasters such as collapse, roof falling and rib spalling are prevented.
Description
technical field [0001] The invention relates to a method for dehydrating water-rich rock formations, in particular to a method for rapidly and advancedly dewatering ore bodies in water-rich rock formations using drilling holes and submersible pumps. Background technique [0002] Advance dredging is the technical guarantee for the safe mining of large water deposits and broken and easily muddy water-rich ore bodies. It not only improves the underground operating conditions and environment, but also enhances the self-stability of mining rocks, improves production efficiency, ensures operation safety, and reduces Mining cost is of great practical value and engineering significance. For previous similar engineering problems, due to the complexity and economy in the construction process, it is generally to use the excavated tunnels or upward boreholes at the same level or above the level to rely on the natural pressure difference formed by construction to drain water-rich rock fo...
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IPC IPC(8): E21D9/00
Inventor 赵国彦李夕兵刘东锐姚金蕊
Owner CENT SOUTH UNIV