Coal mine roof rock loaded fracture discharge spark testing device and ignition energy evaluation method thereof

The coal mine roof rock fracture discharge spark test device, which integrates multi-parameter monitoring and evaluation, has solved the problem of simulating and evaluating roof rock fracture discharge sparks in underground gas environments, and realized the scientific assessment and early warning of gas explosion risks.

CN121830897APending Publication Date: 2026-04-10CHINA UNIV OF MINING & TECH
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Patent Information

Application Number
CN202610081862.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-21
Publication Date
2026-04-10

AI Technical Summary

Technical Problem

Existing technologies cannot accurately simulate the entire process of roof rock fracture discharge spark under load in underground gas-bearing environments, and lack quantitative assessment methods for ignition energy, making it difficult to assess the explosive capacity of rock fracture discharge spark and scientifically assess the risk of gas explosion.

Method used

A test device for spark discharge of rock fracture under load in coal mine roof was designed, including a sealed explosion reaction chamber, a mechanical loading system, a charge induction sensor, a high-speed camera, a photoelectric detector, a gas environment control component, and a data acquisition and processing unit. It realizes synchronous monitoring of multiple parameters and assessment of ignition energy, and combines direct and indirect methods for energy quantification.

Benefits of technology

It achieves accurate simulation of the underground gas environment, synchronously monitors multi-dimensional parameters, provides scientific ignition energy assessment, clarifies the explosion risk of rock fracture discharge, and provides a reliable basis for coal mine gas explosion risk assessment and early warning.

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Abstract

The invention discloses a coal mine roof rock loaded fracture discharge spark testing device and an ignition energy evaluation method. The coal mine roof rock loaded fracture discharge spark testing device comprises a closed explosion reaction box, a mechanical loading system driven by a hydraulic cylinder, a replaceable compression / shearing mold, a silver pole piece, a high-speed camera, a photoelectric detector, a gas environment control assembly, a data acquisition and processing unit and the like. The underground gas concentration environment is simulated through the gas environment control assembly, rock failure mode simulation is achieved through the mechanical loading system, and the multi-source assembly synchronously collects parameters such as the electric charge quantity, the voltage and the spark form. According to the evaluation method, a direct method and an indirect method are fused, effective ignition energy is output after data verification, and the risk is judged by comparing the effective ignition energy with an explosion threshold. The device can simulate the whole process of discharging electric sparks in a gas-containing environment and perform quantitative evaluation, realizes accurate quantification of ignition energy, provides data support for explosion risk evaluation of roof rocks with different lithology, assists coal mine gas explosion early warning, and ensures safe production.
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