Fault and secondary fault activated induced confined water gushing test method and system

Abstract

The invention discloses a fault and secondary fault activated induced confined water gushing test method and a system. The specific structure of the system comprises a similar material simulator stand, a confined water loading system, and a confined water rising guiding system; the similar material simulator stand is a universal two-dimensional testbed; the confined water loading system is composed of a confined water pressurizing device, a water injection pipeline, a water return pipeline, and a computer-control system; the confined water rising guiding system is composed of a water bag, a water insulation layer steel plate, a rising guiding rubber tube, and a thin drain pipe; an original non-water permeability fault is arranged on the similar material simulator stand; the confined water loading system is used for stimulating floor pressurized water; the confined water rising guiding system is used for stimulating flow of confined water along the fault; the influences of experiment parameters on the fault and secondary fault reactivation-induced water-conducting are achieved via changing the experiment parameters such as confined water pressure, fault zone width, advance speed, and distances, and simulated reconstruction of the whole process of water gushing is realized.

Description

technical field [0001] The invention relates to a coal mine water hazard test method and system, in particular to a test method and system for confined water inrush induced by activation of faults and secondary faults. Background technique [0002] With the continuous reduction of shallow easy-to-mining coal resources, the mining depth of mines continues to increase, and various deep mining safety issues and technical difficulties follow. Under the action of high ground stress, the problem of confined water inrush has become one of the important disasters in deep mining, and the activation of non-hydraulic faults (single faults, secondary faults of large faults at the boundary of mines or mining areas) induced by coal seam mining Confined water inrush is the most important manifestation of deep mine water hazards, especially in Shandong and Lianghuai mining areas. The confined water inrush accidents induced by the activation of faults and secondary faults account for more th...

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Problems solved by technology

[0003] Based on theoretical derivation and numerical simulation, a lot of results have been achieved in research on the mechanism and influencing factors of confined water inrush caused by faults caused by coal seam mining and activation of secondary faults. In laboratory experiments, small-sized rocks The relevant characteristics of the simulated inversion of the test piece reveal the mechanism and process of the fault water inrush to a certain extent. There are still deficiencies in the research on the strength and weakness of the induced confined water inrush, how to reproduce the whole process of fault and secondary fault activation water inrush in a large-scale similar model laboratory, and have not further revealed faults and secondary faults. Mechanism and process of activation-induced confined water inrush

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