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Semi-consolidated sandstone aquifer drainage and depressurization method

A water layer and sandstone technology, applied in the field of drainage and pressure reduction of semi-consolidated sandstone aquifers, to achieve safe and efficient recovery and improve the effect of drainage and pressure reduction

Active Publication Date: 2021-03-16
扎赉诺尔煤业有限责任公司 +3
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Problems solved by technology

[0006] In view of this, the embodiment of the present invention provides a method for draining and depressurizing semi-consolidated sandstone aquifers, which can improve the effect of draining and depressurizing semi-consolidated sandstone aquifers, thereby solving the problem of coal resources under semi-consolidated sandstones to a certain extent. The problem of safe and efficient recovery

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Embodiment Construction

[0043] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0044] It should be clear that the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0045] The semi-consolidated sandstone aquifer water-repelling and pressure-reducing method provided in the embodiment of the present invention is proposed for mining areas with semi-consolidated sandstone aquifers, such as the Mengdong mining area, to prevent and control water problems, and can improve this type of semi-consolidated sandstone The water-repelling and pressure-reducing effect of the aquifer provides theoretical reference and guidance for the mining and prevention of water in other mining areas with...

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Abstract

The embodiment of the invention relates to a semi-consolidated sandstone aquifer drainage and depressurization method, and belongs to the field of coal mine water prevention and control. The method comprises the following steps: obtaining basic data of a semi-consolidated sandstone aquifer; acquiring characterization parameters of the damage degree of the overlying strata above the roof; determining water inrush dangers of all the semi-consolidated sandstone aquifers based on the basic data and the overlying strata damage degree characterization parameters, and taking the semi-consolidated sandstone aquifers with the water inrush dangers as drainage target aquifers; determining an advanced drainage mode and parameters based on the position of the drainage target aquifer, and drilling according to the advanced drainage parameters; and watering and discharging the aquifer along the mining-induced cracks and the drill holes to realize drainage and depressurization. The drainage and depressurization effect of the semi-consolidated sandstone aquifer can be improved, so that the problem of safe and efficient recovery of coal resources under the semi-consolidated sandstone can be solved to a certain extent.

Description

technical field [0001] The invention belongs to the field of water prevention and control in coal mines, in particular to a method for water-repelling and pressure-reducing of a semi-consolidated sandstone aquifer. Background technique [0002] Semi-consolidated sandstone is generally a rock formation formed in the Cretaceous period. Its cementation is relatively loose and its compressive strength is low, usually 15-30MPa. It belongs to soft rock, and it has some special requirements for water prevention technology and stope roof management . [0003] For stopes with semi-consolidated rock formations above the roof, due to the poor consolidation of the roof sandstone aquifer, there is a threat of sand and mud collapse during mining at the working face, and local roof rocks will also occur under the action of water pressure. Bulging, stent crushing and other disasters. The difficulty and risk of achieving safe recovery have increased significantly. Many sand break accidents...

Claims

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Application Information

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IPC IPC(8): E21F16/00G06F30/20G06F30/13G06F111/10
CPCE21F16/00G06F30/20G06F30/13G06F2111/10
Inventor 李德军李磊李伟东张风达李寿君武晓适汪义龙申晨辉闫寿庆刘义新焦扬顾雷雨于斌高利晶殷裁云
Owner 扎赉诺尔煤业有限责任公司
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