Dynamic stability monitoring and early warning method for underground deeply-buried curtain

Abstract

The invention discloses a dynamic stability monitoring and early warning method for an underground deeply-buried curtain. The method comprises the following steps that 1) monitoring points are arranged on a curtain body and the periphery of the curtain body; 2) monitoring data is collected and extracted; 3) mesh generation is carried out on a monitoring range; 4) sensitivity division is carried out on monitoring factors; 5) a comprehensive stability threshold value of the curtain is calculated; and 6) a dynamic stability monitoring and early warning system for the curtain is built. Compared with traditional monitoring methods such as microseism and industrial CT, the novel stability monitoring method for the deeply-buried curtain is small in interference factor, data is collected in real time, and the problems of data distortion and information lag do not exist. According to the factor sensitivity sorting and the comprehensive threshold value, monitoring and early warning of the overall stability of the curtain are achieved, and the problem that monitoring and early warning of the stability of the deeply-buried curtain are lack of integrity and integrity is solved.

Description

technical field [0001] The invention belongs to the technical field of mine curtain stability monitoring, and in particular relates to a dynamic monitoring and early warning method for the stability of an underground deeply buried curtain. Background technique [0002] The underground curtain is one of the effective means to solve mine drainage, which can realize the harmonious coexistence of mine development and ecological environment. In recent years, with the improvement of environmental protection requirements, curtain engineering has been applied and developed in more and more large water mines. However, due to the concealment of the underground curtain, coupled with the long-term impact of groundwater erosion and mining conditions, it is difficult to judge its water barrier performance. Once severe seepage or structural instability occurs at the weak position of the curtain, it will seriously endanger the production safety of the mine. [0003] At present, the monito...

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Problems solved by technology

The monitoring of the permeability of dams and foundation pits is mainly carried out with piezometers, and its maximum range is <2.5MPa. However, the osmotic pressure of underground curtains usually exceeds 3MPa, and the existing piezometers cannot meet the measurement requirements.

The monitoring of the stability of the curtain structure usually adopts industrial detection, radio perspective, apparent resistivity, microseismic and other methods, but when it is applied to the deep buried curtain, the data will be distorted due to the interference of mining activities and other factors

[0004] Based on the above, the current stability monitoring method has the following problems: using fixed-point and regular monitoring, it cannot perform real-time dynamic monitoring on the curtain, resulting in a lag in information feedback; it is impossible to perform preventive monitoring beforehand, and the data obtained by the traditional method is post-event data, which cannot be obtained in the curtain. Provide early warning and forecast before failure; many interference factors cause data distortion and cannot truly reflect the stability of the curtain; some existing monitoring instruments have limited range and cannot be applied to deep buried underground curtains

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