Curtain grouting technology for ore body roof karst fracture development and strong water-rich ore deposit
A curtain grouting and roofing technology, which is applied to mining equipment, shaft lining, tunnel lining, etc., can solve problems such as difficulty in adapting, and achieve the effects of saving drainage costs, significant economic benefits, and reducing mining risks
Active Publication Date: 2014-08-06
SINOSTEEL MAANSHAN INST OF MINING RES +1
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Problems solved by technology
However, this curtain grouting water shutoff technology is difficult to adapt to the curtain grouting water shutoff of the ore body roof with developed karst fissures and strong water-rich deposits
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[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0039] Depend on figure 1 The vertical projection diagram of the curtain grouting technology of a kind of orebody roof karst fissure development and strong water-rich deposit of the present invention shown and combined figure 2 It can be seen that the roadway 2 is located below the water level line 6, and each chamber 1 is arranged laterally along the roadway 2.
[0040] 1) Arrangement of upward exploration and injection holes: 6 exploration and injection holes at 5°, 15° and 25° are arranged in each chamber 1, forming a drilling control network within 8m×8m. The design of the exploration and injection drilling holes is based on the center of the chamber, and the six 5° exploration injection holes 3, the six 15° exploration injection holes 4, and the six 25° exploration injection holes 5 are evenly arranged on the plane staggered by 60°. 50...
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The invention discloses a curtain grouting technology for an ore body roof karst fracture development and strong water-rich ore deposit. According to the technical scheme, firstly, upward exploration and injection holes are distributed, six upward exploration and injection holes with an elevation angle of five degrees, six upward exploration and injection holes with an elevation angle of 15 degrees and six upward exploration and injection holes with an elevation angle of 25 degrees are distributed in each chamber, the exploration and injection holes are designed with the chambers as base points, all the exploration and injection holes of all the lengths are evenly distributed in the plane with a stagger angle of 60 degrees, the hole depth is 50 m, and the exploration and injection holes with the elevation angle of five degrees, the exploration and injection holes with the elevation angle of 15 degrees and the exploration and injection holes with the elevation angle of 25 degrees are evenly distributed in the plane with a stagger angle of 20 degrees; secondly, downward exploration and injection holes are distributed, the outward and downward exploration and injection holes with the angles of -5 degrees,-30 degrees and -60 degrees are distributed in end chambers, the hole depth is 50 m, all the downward exploration and injection holes are evenly distributed symmetrically in the plane, and the included angle is 10 degrees; thirdly, according to the requirement of accurate mining engineering, grouting is carried out, and a grouting curtain is formed. The grouting curtain with the high water plugging rate is built under a mine according to roof karst fractures, the functions of water separation and reinforcement can be achieved, ore bodies are released safely and efficiently under the protection of the grouting curtain, and technical guarantees are provided for safe and efficient mining of the mine.
Description
technical field [0001] The invention relates to an underground mine mining technology, in particular to a safe mining technology under the condition of well-developed karst cracks on the roof of an underground mine ore body and strong water abundance. It is suitable for mines with developed karst fissures, karst caves, rich water content and relatively concentrated ore bodies in various aquifers. It can not only enhance the stability of the roof, but also play a role of water isolation. Background technique [0002] The hydrogeological conditions of underground mine deposits in my country vary in complexity. Simply adopting the method of dredging and depressurization will not only cause high drainage costs, but also easily cause serious environmental problems such as ground subsidence and depletion of groundwater resources, such as Shuikoushan lead-zinc mine, Fankou mine, Siding lead-zinc iron mine, etc. For this reason, my country's mine water prevention and control workers...
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IPC IPC(8): E21D11/10E21D11/38
Inventor 王运敏汪为平李何林武飞娄广文范庆汪绍元路洪斌李同鹏唐开元
Owner SINOSTEEL MAANSHAN INST OF MINING RES
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