Method for preventing shaft from cracking in alleviation water-bearing layer by utilizing automatic supply water loss method

Abstract

The invention belongs to the technical field of shafts for coal mine, and particularly discloses a method for preventing a shaft from cracking on an automatic supply water loss layer water level of an alleviation water-bearing layer. The method comprises a structure of an automatic supply water drill hole and a method, wherein the automatic supply water drill hole and the upper group of water-bearing layer are corresponding provided with a set of drain pipes (bridge-type flower pipes), a middle water separating pipe section is a solid pipe, a set of water filling pipes are corresponding arranged on the middle and lower groups of water-bearing layer, and the bottom is a sand setting pipe; the water of the alleviation water-bearing layer enters into water filling holes through gravels and the drain pipes arranged at the periphery of the drill hole, the water fills a water loss layer through the water filling pipes of the water loss layer under the action of the water level differential pressure, and a purpose that the water supply can stabilize the water level is achieved, gushing sands in a water supply process precipitates the bottom sand setting pipe, the water filling pipe is prevented from plugging, the water filling effect is guaranteed, and a condition that the water level falls so as to cause the transformation and crack of the well wall is reduced and eliminated.

Description

technical field [0001] The invention belongs to the technical field of shaft shafts used in coal mines, in particular to a method for automatically supplementing the water level of a water loss layer in an alluvial aquifer to prevent shaft shaft rupture. Background technique [0002] The shaft shaft is an important channel for coal mine lifting and transportation, mine ventilation, pipeline hoisting and personnel going up and down, and is the throat of the production mine. Shaft damage will undoubtedly cause great harm to mine production and safety. Shaft damage phenomena and hazards mainly include: ① Huge potential safety hazards, including: shaft wall rupture, broken concrete blocks falling, easy to hurt people and smash equipment in the shaft; Deformation, tank jamming and other major accidents; well wall fracture may lead to the possibility of major disasters such as water gushing from the alluvial aquifer into the wellbore, sand collapse, and well flooding. ② Serious e...

AI Technical Summary

Problems solved by technology

② Serious economic losses, including: coal production is affected during mine shutdown and treatment; "well ring reinforcement", "casing wall" and "pressure relief tank" treatment affects improvement and ventilation capacity; treatment works require a certain amount of money, etc.

[0008] (3) The cost of the ground grouting treatment project is high, the construction process is not easy to control, and it is easy to cause

[0009] Deformation of wellhead equipment, etc., the treatment effect is slightly better, but it cannot maintain long-term stability of the wellbore;

[0010] (4) The disadvantages of ground drilling water injection to stabilize the water level are: first, long-term water supply from external water sources is required, and some water injection equipment and costs need to be invested; second, additional labor management fees are required; third, water supply pipelines and pipelines need to be invested Winter maintenance fees; Fourth, higher water injection fees are required; Fifth, the quality of injected water may pollute the aquifer

[0011] Limited by cognition and experimental level, so far there is no technology to prevent wellbore rupture by automatic water replenishment of aquifer

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