Physical simulation experiment device and method for fine exploration of water outlet layer section of underground rock stratum

By designing a simulation experimental device combining distributed acoustic sensing technology, the problem of insufficient identification accuracy of water-rich layer sections in complex geological environments of traditional exploration methods is solved, and the accurate exploration of water-rich layer sections of underground rock layers is achieved, improving the efficiency and accuracy of water damage prevention and control.

CN120385805AActive Publication Date: 2025-07-29XIAN RES INST OF CHINA COAL TECH & ENG GRP CORP
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Patent Information

Application Number
CN202510438333.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-09
Publication Date
2025-07-29
Estimated Expiration
2045-04-09

AI Technical Summary

Technical Problem

The existing hydrogeological exploration methods are insufficient in exploring the water-rich sections of underground rock strata of coal mines, making it difficult to meet the high-precision requirements of modern mine water prevention and control measures, especially in complex geological environments, which are difficult to effectively identify relatively water-rich sections.

Method used

A physical simulation experimental device for fine exploration of the effluent section of the underground rock layer was designed. Combined with distributed acoustic wave sensing technology (DAS), the sound wave generation and propagation environment under different flow velocities, lithologies and outlet sizes were simulated to achieve accurate identification of relatively water-rich sections in huge thick aquifers. The device includes a water storage tank, rock silo, simulated drilling pipe, acoustic sensor armored optical cable and a hydrodynamic parameter acquisition system, which can accurately control the water flow and acoustic wave propagation environment, and combine experimental data inversion technology under various variable conditions.

Benefits of technology

It improves the exploration accuracy of the water-rich layer section, breaks through the limitations of traditional exploration methods, realizes high-precision identification under complex hydrological conditions, provides reliable data support, and provides technical guarantees for coal mine water damage prevention and safety production.

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Abstract

The invention provides an underground rock stratum water outlet section fine exploration physical simulation experiment device and method.The underground rock stratum water outlet section fine exploration physical simulation experiment device comprises a water storage tank, the water storage tank is connected with a water pump, the water pump is connected with one ends of a plurality of water supply valves through one-way valves, and the other ends of the water supply valves are connected with rock bins in a one-to-one correspondence mode; the rock bins are vertically installed on the side wall of the simulation drilling pipe. Flange end covers are installed at the two ends of the simulation drilling pipe respectively, a water return opening sealing head is installed on the flange end cover at the tail end of the simulation drilling pipe, and the water return opening sealing head is connected with the water storage tank through a water return valve to return water. An energy storage pressure stabilizer is further arranged between the water storage tank and one end of each water supply valve. A sound wave sensing armored optical cable is coaxially installed in the simulation drilling pipe. Various geological and hydrological conditions in an actual underground rock stratum environment can be effectively simulated, the exploration precision of a water-rich layer section is improved by analyzing the change rule of sound wave signals, and reliable technical support is provided for coal mine water disaster prevention and control and safe production.
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