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Method for identifying bed separation water inrush

A technology of abscission water accumulation and abscission, which is applied in the fields of earth square drilling, mining equipment, climate change adaptation, etc., can solve the lack of systematic, comprehensive, complex water permeation mechanism, lack of early warning identification and prevention measures for abscission water inrush targeted issues

Active Publication Date: 2021-08-06
NORTH CHINA INST OF SCI & TECH
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Problems solved by technology

However, due to the complexity of the disaster-causing mechanism and permeable mechanism of detached water inrush and various forms, the understanding of it is still not systematic and comprehensive, and the early warning, identification and prevention measures of detached water inrush are still lacking in pertinence.

Method used

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  • Method for identifying bed separation water inrush
  • Method for identifying bed separation water inrush
  • Method for identifying bed separation water inrush

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Embodiment Construction

[0092] 1. Disaster-causing process of delaminated water body

[0093] A large amount of practical experience shows that the water inrush from the abscission layer of the coal seam roof is a dynamic process, and its formation, development and final end roughly go through three stages:

[0094] (1) The first stage: the formation of detachment space

[0095] When the underground coal seam is mined out, the direct roof strata in the mined-out area will move and bend downward under the action of self-gravity and the overlying strata. When its internal tensile stress exceeds the tensile strength limit of the rock strata, the direct roof first breaks, breaks, and collapses one after another, while the old roof rock stratum moves and bends along the normal direction of the bedding surface in the form of beam or cantilever beam bending, and is affected by Influenced by the stratification of coal-measure strata and the differences in structure and lithology, the mining overlying rock i...

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Abstract

The invention discloses a method for identifying bed separation water inrush. The method comprises the following steps of determining formation conditions of a coal seam roof bed separation water inrush process; classifying the bed separation water disasters by combining a bed separation water inrush mechanism and water inrush characteristics; and carrying out possibility analysis on the mining area bed separation water inrush. The exploitation coal seam roof bed separation water inrush is a dynamic process, the formation, development and final end of the coal seam roof bed separation water inrush are roughly subjected to three stages of bed separation space formation, bed separation space water accumulation and bed separation water inrush, the formation conditions of each stage are researched and analyzed, and bed separation water disasters are classified by combining the bed separation water inrush mechanism and the water inrush characteristics; and bed separation water inrush possibility analysis is carried out according to the formation condition of each stage and the rock stratum lithology of a mining area.

Description

technical field [0001] The invention relates to the technical field of mining engineering. Specifically, it is a method for identifying abscission water inrush. Background technique [0002] Most coal mining enterprises in my country have complex hydrogeological conditions, and water damage from abscission water occurs from time to time, which has caused great harm to mine enterprises. [0003] In recent years, a large number of scholars have conducted a lot of research on the law and mechanism of roof delamination water gushing, and their understanding has become more and more profound. [0004] Wang Jingming analyzed the hydrogeological, engineering geological conditions and mining conditions for the secondary water hazards in the Haizi Coal Mine, similar material simulation and numerical simulation of the roof movement, and put forward for the first time the viewpoint of disasters caused by the rupture of secondary abscission layer water pockets. [0005] Based on the h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/18
CPCE21F17/18Y02A10/40
Inventor 易四海尹尚先连会青徐斌吴金随刘德民
Owner NORTH CHINA INST OF SCI & TECH
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