Directional long-distance permeability augmentation method of coal and rock masses
A coal-rock mass and long-distance technology, which is applied in the field of directional long-distance seepage enhancement of coal and rock mass, can solve the problems of poor repeatability, single directionality, and unsatisfactory secondary transformation effects, etc., to reduce economic costs, wide application range, The effect of improving safety and reliability
Inactive Publication Date: 2019-06-11
GUIZHOU UNIV
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Problems solved by technology
However, this method is directional and single, and the repeatability is poor, and the secondary stimulation effect is not ideal; although the high-energy gas fracturing has a short boosting time, the direction of the fracture is not controlled by the ground stress.
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Embodiment 1
[0026] Example 1: A karst water area in Guizhou needs to divert and gather groundwater. The diversion location is about 70m underground. The lithology of this layer is dense carbonate rock with low permeability and a certain distance. Now it is necessary to reform the cracks in this layer, and increase the permeability of carbonate rock in a directional and long-distance manner. Now, the directional and long-distance infiltration method of coal and rock mass is used to increase the permeability of carbonate rock, so that the groundwater can be discharged in a directional manner.
[0027] In view of the above situation, the present invention adopts a method for directional long-distance seepage enhancement of coal and rock mass, such as Figure 1-3 As shown, the method includes the following steps:
[0028] (1) Determine the direction in which the permeability needs to be increased in the rock body.
[0029] (2) Making a PVC pipe with a wall thickness of 2 mm and an outer diam...
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Abstract
The invention discloses a directional long-distance permeability augmentation method of coal and rock masses. The directional long-distance permeability augmentation method of the coal and rock massescomprises the following steps that (1) the direction requiring to add permeability in rock masses is ensured; (2) a PVC pipe is manufactured into an outer shell and an energy collecting cover of an explosive tube; (3) the outer shell and the energy collecting cover which are manufactured from the PVC pipe are uniformly coated with antistatic paint, and the energy collecting cover and the outer shell are bonded together by adhesive; (4) a mine-used water gel explosive column is loaded into the energy collecting cover so that an explosive roll can be manufactured; (5) a plurality of blasting holes are drilled from the permeability-adding direction to the rock mass requiring directional crack permeability-adding on the ground, and the blasting holes are arranged linearly in the permeability-adding direction; and (6) after the explosive roll is loaded into the blasting holes, all blasting holes are blocked, and filled explosive are detonated. According to the directional long-distance permeability augmentation method of the coal and rock masses, multiple lines of parallel blasting holes which are arranged linearly are achieved in the crack direction requiring directional long distancepermeability-adding. The formed cracks are connected in a series mode to increase the length of the crack, and permeability of the coal and rock mass can be improved to the maximum extent.
Description
technical field [0001] The invention relates to a method for directional long-distance seepage enhancement of coal and rock mass, and belongs to the technical field of directional seepage increase of coal and rock mass. Background technique [0002] With the development of science and technology, a large number of infrastructure projects (including transportation, energy, industry, etc.) have been established one after another, and the ability of human beings to transform nature is increasing day by day. At the same time, a large number of engineering bodies are built on (or in) the coal rock mass, so it is particularly important for us to grasp and transform the coal rock mass. Among them, the cracks in coal and rock mass are a prominent factor, which is beneficial to us (including the extraction of gas, shale gas, natural gas, groundwater, oil, etc.) and harmful (including rock mass instability, rockburst, water gushing, etc.). Therefore, the research on the reconstructio...
Claims
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Login to View More IPC IPC(8): F42D1/08F42D3/04
Inventor 商大成裴鹏
Owner GUIZHOU UNIV