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Method for preventing stones from entering water turbine in rockburst areas with high buried depth, high ground temperature and high ground stress

A technology with high in-situ stress and high geo-temperature, applied in high burial depth and high geo-stress rockburst areas to prevent stones from entering the turbine in the tunnel, and in areas with high geo-temperature, it can solve problems such as reducing power generation efficiency, shutting down the water diversion power generation system, and stones entering the turbine, etc. , to improve safety and economic benefits, ensure safe operation, and avoid downtime for maintenance work.

Active Publication Date: 2017-02-01
CHINA WATER RESOURCES BEIFANG INVESTIGATION DESIGN & RES
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Problems solved by technology

However, the problem with this method is that it is impossible to scientifically and rationally determine the time for cleaning the stone collection pit. If the frequency of cleaning work is too high, it will cause frequent but unnecessary shutdowns of the water diversion power generation system, reducing the efficiency of power generation; if the frequency of cleaning work If it is too low, it may happen that the stone collection pit has already been filled and the stones enter the water turbine

Method used

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  • Method for preventing stones from entering water turbine in rockburst areas with high buried depth, high ground temperature and high ground stress
  • Method for preventing stones from entering water turbine in rockburst areas with high buried depth, high ground temperature and high ground stress

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Embodiment Construction

[0013] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0014] A method for preventing stones in tunnels from entering water turbines in areas with high buried depth, high ground temperature, and high ground stress rockbursts. By arranging monitoring instruments in the rock-collecting pits of power diversion tunnels, the location of the rock-collecting pits can be judged by monitoring the readings of the monitoring instruments arranged. The degree of filling determines whether to carry out block removal work.

[0015] Specifically, the following steps are included:

[0016] (1) Calibration of monitoring instruments: The monitoring instruments include an anti-corrosion metal box without a cover, a number of earth pressure gauges fixed at the bottom of the metal box, and an external reading instrument connected to the earth pressure gauge through a data transmission cable. Calibration When rocks of di...

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Abstract

The invention discloses a method for preventing stone in a tunnel from entering a water turbine in a high-burial-depth, high-ground-temperature and high-ground-stress rockburst area. Monitoring instruments are arranged in a stone collecting pit of the power generating and water guiding tunnel, the filling degree of the stone collecting pit is judged by monitoring the readings of the arranged monitoring instruments, and accordingly whether stone removing work needs to be carried out or not is determined. The purpose that the full-load degree of the stone collecting pit in the power generating and water guiding tunnel is effectively judged is achieved, running safety of power generating equipment of a hydropower station is ensured, and power generating benefits are not wasted.

Description

technical field [0001] The invention relates to a method for preventing stones from entering a water turbine, in particular to a method for preventing stones in a tunnel from entering a water turbine in a rockburst area with high buried depth, high ground temperature and high ground stress. Background technique [0002] In the design of water diversion tunnels for power generation, in order to make full use of the self-stabilizing capacity, bearing capacity and anti-seepage capacity of the surrounding rock and reduce investment, according to the "Code for Design of Hydraulic Tunnels": Type II surrounding rock and tunnel diameters of 6 to 10m should be shotcrete Support; Type III surrounding rock can be supported by spraying anchors and hanging nets. However, for water diversion power generation tunnels in areas with high buried depth, high geostress, and high geothermal rockburst, the surrounding rock is supported by spray anchors or bare tunnels, and the following situation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B9/00G01V9/00
CPCY02E10/20
Inventor 王立成李浩瑾王振光任智锋李明娟赵健马妹英于野吴培霖贾静
Owner CHINA WATER RESOURCES BEIFANG INVESTIGATION DESIGN & RES
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