School of Energy Science and Engineering, Henan Polytechnic University State Key Laboratory Cultivation Base
for Gas Geology and Gas Control, Henan Polytechnic University

为了探究不同裂隙发育程度、分布非均匀程度的煤样在加载过程中声发射响应规律,利用RMT-150B岩石力学伺服试验系统和声发射监测系统对寺河矿不同裂隙发育程度、分布非均匀程度的煤样进行原始渗透率和加载过程中声发射参数测试。结果表明:裂隙分布较均匀的煤样加载时,声发射能量在塑性变形阶段前期或弹性变形阶段后期快速增至最大值,后略有减小并维持在一定水平;裂隙分布非均匀性强且裂隙发育的煤样加载时,声发射能量在弹性变形初期就达较高值,后逐渐增加至最大值,随后稳定在一定值。试验结果对采煤过程中煤岩变形规律具有较好的预测作用。

In order to research the response rule of acoustic emission about coal and rock with different fissures and heterogeneity in the loading process, original permeability and acoustic emission parameters in the loading process about the coal samples with different fissures and heterogeneity in Sihe Coal Mine were tested by the RMT-150B rock mechanics test system and acoustic emission system. The results showed that acoustic emission energy increased quickly to maximum in the late s tage of plastic deformation or in the early stage of elastic deformation when the fractures of coal samples were uniform, then the energy decreased slightly and maintai ned at a level. Acoustic emission energy was high at the beginning of the elastic deformation, then the energy increased to the maximum, finally the energy maintained at a certain value when the fractures of coal samples were non-uniform and developed. The experimental results had a good prediction on the deformation of coal and r ock in the process of coal mining.

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