Model test device and method for wellbore deflection mechanism of vertical shaft with hydrophobic settlement at the bottom of thick loose layer

Abstract

The invention provides a model test device and method for the deflection mechanism of a vertical wellbore with hydrophobic settlement at the bottom of a thick loose layer. Soil body, the soil body includes an overlying stratum and a bottom aquifer from top to bottom in the box, and the bottom of the bottom aquifer is filled with coal seam water bags; the shaft shaft is arranged in the box The hydraulic loading system includes an oil cylinder, the oil cylinder is located above the soil body, and the oil cylinder can provide pressure for the soil body; the data monitoring system includes a first optical fiber, a second optical fiber, an earth pressure box and A data collector, the earth pressure cell communicates with the data collector through a data line. The model test device and test method are of great significance for revealing the shaft deflection mechanism of the vertical shaft with hydrophobic settlement at the bottom of the thick loose layer.

Description

technical field [0001] The invention relates to the field of mine construction, in particular to a model test device and method for shaft deflection mechanism of vertical shaft with thick loose layer bottom containing hydrophobic settlement. Background technique [0002] Since the 1980s, a large number of mines in many mines in my country have experienced shaft wall rupture disasters in thick and unconsolidated layers, causing heavy economic losses and seriously restricting the further development of deep shaft construction in my country. Many years of research in China have shown that the main cause of most wellbore failures in shaft wall failure disasters is that the bottom aquifer (bottom gravel layer) of the loose layer that the mine passes through is mostly directly covered on the coal-measure strata, and coal mine production leads to bottom water drainage, causing It is caused by the secondary consolidation settlement of the soil layer around the wellbore and the verti...

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Problems solved by technology

[0002] Since the 1980s, a large number of mines in many mining areas in my country have experienced shaft wall rupture disasters in thick and loose layers, causing major economic losses and seriously restricting the further development of deep shaft construction in my country.

In view of the fact that there is no model test device and method for the research on the deflection mechanism of coal mine shaft under the action of hydrophobic settlement at the bottom of the thick loose layer, in order to reveal the deflection mechanism of the shaft of the coal mine shaft under the action of hydrophobic settlement at the bottom of the thick loose layer, a thick loose layer was built. It is imminent to set up a model test device for the mechanism of the deflection mechanism of the vertical shaft with hydrophobic subsidence and to determine the test method

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