Technology for harnessing coal mine hydrogen sulfide by using high-voltage pulse liquid injection
A high-voltage pulse, hydrogen sulfide technology, applied in mining equipment, safety devices, earthwork drilling and mining, etc., can solve problems containing high concentration of hydrogen sulfide
Inactive Publication Date: 2009-05-27
SHANXI COKING COAL GROUP
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Problems solved by technology
[0011] In order to solve the problem of high-concentration hydrogen sulfide in coal seams existing in the prior art, the present invention provides a technology for treating hydrogen sulfide in coal mines by using high-pressure pulse liquid injection
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[0053] A technology for treating hydrogen sulfide in coal mines by using high-pressure pulse liquid injection, comprising the following steps: drilling, and then pulse-type high-pressure injection of sodium carbonate aqueous solution into the borehole, the water injection pressure is 4-5Mpa, the water injection time for a single hole is generally 2-3 days, and the carbonic acid Sodium concentration 1%.
[0054] The diameter of the drilling hole is 65mm, the diameter of the sealing part is 75mm, the depression angle of the drilling hole is 0°~1°, the hole is sealed after water injection, and the sealing depth is 10m and the hole is sealed with cement mortar.
[0055] Pulse dynamic pressure water injection system and equipment used in pulse high pressure injection. like Figure 4 As shown, the composition and working principle of the pulse dynamic pressure water injection system
[0056] The mine adopts the MKZ type system, which mainly consists of 2BZ-40 / 12 pulse type coal se...
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The invention relates to technology for treating harm in coal mining, in particular to technology for treating sulfureted hydrogen in a coal mine through high-voltage pulse injection. The technology solves the problem that in the prior art a treated coal layer contains high-concentration sulfureted hydrogen. The technology comprises the step of drilling. The technology is characterized in that a sodium carbonate aqueous solution is injected to the coal layer by drilling pulse type high pressure; the injection pressure is between 4 and 5 MPa; the time for single hole injection is between 2 and 3 days; and the concentration of sodium carbonate is 1 percent. Under the condition of not fracturing the coal layer, pulse high-pressure water forms continuous water shock in the inside of the coal layer so as to force original closed cracks inside the coal layer to be communicated or directly form a new crack net inside the coal layer, thereby forming a passage net of water in the coal layer; subsequently, water remained in a permeation passage further permeates a smaller crack of coal layer hole under molecular action; and NaCO3 molecules in the water and H2S molecules in the crack of a coal body react to achieve the aim of removing the sulfureted hydrogen.
Description
technical field [0001] The invention relates to a coal mining hazard control technology, in particular to a technology for controlling hydrogen sulfide in coal mines by using high-pressure pulse liquid injection. Background technique [0002] In the process of coal mining, abnormal hydrogen sulfide will appear in the fully mechanized mining working face in some special areas, and the hydrogen sulfide contained in the coal seam will overflow a large amount, and some areas will exceed the specified value of the safety regulations, seriously affecting the health of workers and the normal operation of the working face. Production. When this happens, comprehensive measures such as strengthening ventilation and spraying alkaline water are generally adopted to control hydrogen sulfide. Hydrogen sulfide is a colorless gas. It has a special smell like rotten eggs at low concentrations. At high concentrations, it causes olfactory nerve paralysis and makes people feel less odor. It is...
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IPC IPC(8): E21F5/08
Inventor 赵义胜张崇智赵俊田王林中
Owner SHANXI COKING COAL GROUP