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Secondary recovery method for stagnant ore blocks

A secondary recovery and sluggish technology, applied in the direction of mining fluid, earth drilling, wellbore/well components, etc., can solve the problems of the underground dissolution cavity losing the sealing condition, the inability to perform brine extraction by water lifting, and the reduction of brine extraction capacity. Achieve the effects of reducing energy consumption, alleviating the shortage of brine sources for salt making, and restoring normal production

Inactive Publication Date: 2015-08-19
陈建明 +1
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Problems solved by technology

Due to the loss of sealing conditions in the underground dissolution cavity, it is impossible to carry out water extraction for brine
Therefore, the mining of the dissolved cavity had to be stopped, and the first mining area was also in a state of being abandoned. The mine's brine mining capacity was correspondingly reduced by one-third, which had a great impact on salt production, and the brine polluted a large amount of paddy

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  • Secondary recovery method for stagnant ore blocks
  • Secondary recovery method for stagnant ore blocks

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0033] figure 1 It is a schematic diagram of the location of the new well in the embodiment of the present invention, figure 2 It is a schematic diagram of the structure of the new well body and its relationship with the waste dissolution chamber in the embodiment of the present invention.

[0034] like figure 1 As shown, it is a schematic diagram of the location of the new well in the embodiment of the present invention. The dogleg stope is composed of twelve wells. The horizontal projection of the underground dissolution cavity is in the shape of an inverted mountain. The overburden layer on the ore body is 237.6-387.42 meters thick, and the incipient solution layer is buried at a depth of 272.5-341.8 meters. The or...

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Abstract

The invention discloses a secondary recovery method for stagnant ore blocks. The method comprises the following steps: a new well drilling, single well channelling, water injection fracturing, channel expanding, mounting of an oil-immersed pump and secondary recovery. According to the method provided by the invention, a large amount of stagnant bittern in a waste solution cavity is directly drawn, in a later period, and fresh water is supplemented through a relatively good old well in a subsidence area to dissolve the stagnant ore blocks in the subsidence area, so that the recovery ratio of mineral resources is increased. An aquifer in the subsidence area is effectively drained or the water level of the aquifer in the subsidence area is effectively reduced, therefore, bittern on farmlands can be controlled basically and loss of the agricultural industry is reduced.

Description

technical field [0001] The invention relates to a method for mining seams, in particular to a method for secondary mining of sluggish ore blocks. Background technique [0002] China's halogen deposits were mined by the primitive fracturing method in the 1970s and 1980s. The direction of fractures generated during fracturing between wells cannot be controlled artificially. Therefore, the connection between two wells can only be left to fate. Generally, it is difficult to form horizontal fractures at the bottom of the well, and the pressure between the designed wells is impassable. The constructor often adopts forced fracturing. The result of this kind of construction often produces vertical fractures, the roof of the dissolution cavity is crushed, and the upper covering layer of the ore body is often filled with a large amount of water. , into a brine-bearing layer. [0003] In addition, due to the long-term super-intensive dissolution mining of the underground cave, the spa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/28
CPCE21B43/283E21B43/30
Inventor 陈建明陈镇鑫
Owner 陈建明
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