深部巷道应变型冲击地压能量模型及近场围岩供能规律研究

赵同彬，姚金鹏，郭  磊，郭伟耀，张玉宝

深部巷道应变型冲击地压能量模型及近场围岩供能规律研究

赵同彬，姚金鹏，郭磊，郭伟耀，张玉宝

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- 网络出版日期: 2023-08-30
- 刊出日期: 2023-08-22

Research on energy model of rock burst under strain in deep roadway and energy supply law of near-field surrounding rock

ZHAO Tongbin

摘要

摘要: 近场围岩弹性变形能的积聚及突然释放是深部巷道应变型冲击地压发生的本质。为了进一步认识近场围岩能量对冲击地压灾害的作用机理，采用理论分析和数值模拟相结合的方法，建立应变型冲击地压“供能体-冲击体”模型，提出应变型冲击地压发生的能量分阶段作用过程，揭示了不同因素下应变型冲击地压能量源对冲击体的供能规律。结果表明：应变型冲击地压发生过程中，供能体能量占近场围岩系统总能比例与供能体-冲击体刚度比呈负相关；顶底板弹性模量越高，深部煤体供能占比越高，顶底板供能占比越低；冲击深度越大，对应深部煤体供能占比越低，顶底板供能占比越高；在顶底板岩层较硬的条件下，应变型冲击地压的防治在于降低深部煤体储能，减小深部煤体供能；在顶底板岩层较软条件下，应变型冲击地压的防治应加强顶板支护与底板卸压，减小顶底板供能；顶底板岩层是强应变型冲击地压的主要能量源，深部煤体能量对弱应变型冲击起到主导作用。
- 应变型冲击地压 /
- 能量源 /
- 冲击体 /
- 弹性模量 /
- 冲击深度
Abstract: The accumulation and sudden release of elastic energy of near-field surrounding rock is the essence of strain-type rock burst in deep roadway. In order to further understand the mechanism of near-field surrounding rock energy on rock burst disasters, a strain-type rock burst model was established, the energy process of strain-type rock burst was proposed, and the energy supply law of strain-type rock burst energy source to burst rock under different factors was revealed by combining theoretical analysis and numerical simulation. The results show that: in the strain-type rock burst, the ratio of energy supply to total energy of near-field surrounding rock system is negatively correlated with the stiffness ratio of energy supply to burst rock; the higher the elastic modulus of the roof and floor is, the higher ratio of the deep coal is, and the lower ratio of the roof and flooris. The larger depth of the burst rock is, the lower the energy supply ratio of the corresponding deep coal is, and the higher the energy supply ratio of the roof and floor is; under the condition of hard roof and floor strata, the prevention and control of strain-type rock burst is to reduce the energy storage of deep coal and reduce the energy supply of deep coal. Under the condition of soft roof and floor strata, the prevention and control of strain-type rock burst should strengthen roof support and floor pressure relief to reduce the energy supply of roof and floor; the roof and floor are the main energy supply sources for the strong-strain-type rock burst, and the energy of the deep coal plays a scouring effect on the weak-strain-type rock burst.
- strain-type rock burst /
- energy source /
- burst rock /
- elastic modulus /
- burst depth

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深部巷道应变型冲击地压能量模型及近场围岩供能规律研究

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出版历程

Research on energy model of rock burst under strain in deep roadway and energy supply law of near-field surrounding rock

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