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A method for sealing the wellhead of an abandoned coal mine

A technology for coal mines and roadways, which is applied in the field of plugging of wellheads in abandoned coal mines, can solve problems such as waste water pollution, water quality, ecological environment, landscape damage, etc., and achieve the effect of reducing treatment costs.

Active Publication Date: 2022-03-01
贵州煤设地质工程有限责任公司
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Problems solved by technology

However, a large number of coal mining activities have also brought about many problems, such as the waste water pollution from abandoned mine shafts, specifically: because the shaft shaft is not closed, a large amount of waste water still flows out from the abandoned mine / mine shaft along the original well mouth, and continues to pollute In the local environment, due to the discharge of acidic iron-containing wastewater from coal mines, several kilometers of Tiexiu water appeared downstream of the abandoned mine. Serious destruction

Method used

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  • A method for sealing the wellhead of an abandoned coal mine
  • A method for sealing the wellhead of an abandoned coal mine
  • A method for sealing the wellhead of an abandoned coal mine

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Embodiment

[0038] (1) Engineering geological conditions

[0039] According to the "Resource Verification and Exploration Report of Baiyanglin Coal Mine in Xixiu District, Anshun City" and the shallow survey at the entrance of the cave, the main roadway of Baiyanglin Coal Mine is an inclined roadway with a depression angle of 15°, and the strata within the roadway are mainly Longtan Formation (P 3 l) Siltstone, about 85 meters thick. According to the survey of the shallow part of the entrance of the cave, it is inferred that the surrounding rock of the roadway is strongly weathered, and the crack rate of joints and fissures per square meter is 7% to 9%; the overlying rock is the Changxing Dalong Formation (P 3 c+d) Limestone, the underlying rock is the Emeishan basalt formation (P 3 β), the dip of the formation is 135-150°, the dip angle is 4-8°, and the two are in parallel unconformity contact.

[0040]Regional engineering geological rock formations can be divided into three categories...

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Abstract

The invention relates to the technical field of abandoned coal mine well treatment, in particular to a sealing method for the wellhead of an abandoned coal mine. The sealing method adopts the sealing method of retaining wall pouring + surrounding rock airtight reinforcement + pipeline layout + roadway filling. In the present invention, the sewage treatment function is built in, that is, a manganese sand section wrapped with quicklime and limestone is arranged inside the conventional clay sealing section, and the quick-acting property of quick-acting neutralization of mine acid sewage and the long-acting property of limestone are utilized to firstly reduce the acidity of sewage, and then Adsorbs iron and manganese ions. If the quality of the effluent sewage reaches the standard, the treatment effect will be achieved; even if the quality of the effluent water is not up to the standard, after pretreatment, the difficulty and cost of future treatment will be reduced.

Description

technical field [0001] The invention relates to the technical field of abandoned coal mine well treatment, in particular to a method for sealing the wellhead of an abandoned coal mine. Background technique [0002] As one of the three major fossil energy sources, coal has long been the most important energy pillar for my country's development, and its status will not change in the future. However, a large number of coal mine activities have also brought about many problems, such as the waste water pollution from abandoned mine shafts. Specifically: because the shaft shaft is not closed, a large amount of waste water still flows out from the abandoned mine / mine shaft along the original well mouth, etc., and continues to pollute In the local environment, due to the discharge of acidic iron-containing wastewater from coal mines, several kilometers of Tiexiu water appeared in the downstream of the abandoned mine. Serious destruction. Contents of the invention [0003] In ord...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/00E21F15/00E21F16/00E21F17/103E21D11/10
CPCE21F17/00E21F15/00E21F16/00E21F17/103E21D11/10
Inventor 王彤标田要广靳雪姣杨正东陈金宏王刘文席冬冬
Owner 贵州煤设地质工程有限责任公司
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