Shadunzi Coal Mine of Luxin Company, Jinneng Holding Coal Industry Group
China Mine Safety Society

针对西部矿区宽煤柱非连续卸压诱发冲击地压现象,通过现场实测和理论分析,研究了卸压区域与未卸压区域的来压特征、煤柱应力分布特征和微震活动特征,建立了非连续卸压宽煤柱诱发冲击的分析模型,揭示了非连续卸压宽煤柱的冲击地压诱发机理,在此基础上探讨了宽煤柱冲击地压防治方法,研究结果表明,上覆侧向顶板与超前支承压力作用下,应力集中区域会向未卸压煤体的中部转移,容易发生非稳定性失稳。未弱化顶板破断产生的动载扰动也是诱发宽煤柱冲击的重要因素。最后提出,宽煤柱体连续性卸压与上覆顶板岩层弱化,有助于防治宽煤柱诱发冲击地压。该研究结果将为煤矿巷道宽煤柱冲击地压的防治提供技术支撑。

In terms of the phenomenon of rockburst induced by discontinuous pressure relief of wide coal pillars in western mining area, based on field measurement and theoretical analysis, the pressure characteristics, coal pillar stress distribution characteristics and microseismic activity characteristics of pressure relief area and non-pressure relief area are studied. The analysis model of rockburst induced by discontinuous pressure relief of wide coal pillars is established, and the mechanism of rockburst induced by discontinuous pressure relief of wide coal pillars is revealed. On this basis, the prevention and control method of rockburst of wide coal pillars is discussed. The results show that under the action of upper lateral roof and advanced abutment pressure, the stress concentration area will transfer to the middle of the non-pressure relief coal body, which is prone to unstable instability. Dynamic load disturbance caused by roof breaking is also an important factor to induce wide coal pillar burst. The results of this study will provide technical support for the prevention and control of rockburst from wide coal pillars in coal mine.

赵平平,张立明.宽煤柱非连续卸压诱发冲击地压机制研究[J].煤炭工程,2024,56(12):103-107.