围岩应力回迁诱发滞后性冲击与突出现象机制研究
发布时间：2018-10-13 19:59
【摘要】：为探究卸压区域再次应力集中诱发异常冲击与突出事故的发生机制,以河南某矿25110工作面为例,结合河南2起典型事故,提出应力回迁概念。利用理论分析、数值模拟、现场实测等方法,研究应力回迁现象的发生过程、力学机制及防治对策。结果表明:围岩应力回迁现象存在,且具有滞后性、隐蔽性特征;深部煤体过度卸压弱化自身承载能力,并迫使支承压力向巷道方向回迁,是滞后性冲击与突出灾害发生的主要原因。结合该类灾害特点,提出近场强卸压与强支护、深部控卸压与强监测的防治对策,并被应用于河南某矿25110工作面,保证了该工作面的安全回采。
[Abstract]:In order to explore the mechanism of abnormal shock and outburst induced by restress concentration in relief area, the concept of stress return is put forward with the example of No. 25110 face in a certain mine in Henan province, combined with two typical accidents in Henan Province. By means of theoretical analysis, numerical simulation and field measurement, the occurrence process, mechanics mechanism and prevention measures of stress return phenomenon are studied. The results show that the phenomenon of stress return of surrounding rock exists and has the characteristics of lag and concealment, the overpressure relief of deep coal body weakens its bearing capacity and forces the bearing pressure to move back to the roadway. It is the main reason of lag shock and prominent disaster. Combined with the characteristics of this kind of disaster, the prevention and treatment countermeasures of near field strength pressure relief and strong support, deep control pressure relief and strong monitoring are put forward, and they are applied to 25110 face of a certain mine in Henan province, which ensures the safe mining of the working face.
【作者单位】： 华北科技学院安全工程学院;中国安全生产科学研究院信息中心;北京科技大学土木与环境工程学院;
【基金】：国家自然科学基金资助(51604115;51504096) 河北省省级科技计划项目(16275512) 廊坊市科学技术研究与发展计划项目(2016013116) 河北省自然科学基金资助(E2016508003)
【分类号】：TD311
本文编号：2269733
[Abstract]:In order to explore the mechanism of abnormal shock and outburst induced by restress concentration in relief area, the concept of stress return is put forward with the example of No. 25110 face in a certain mine in Henan province, combined with two typical accidents in Henan Province. By means of theoretical analysis, numerical simulation and field measurement, the occurrence process, mechanics mechanism and prevention measures of stress return phenomenon are studied. The results show that the phenomenon of stress return of surrounding rock exists and has the characteristics of lag and concealment, the overpressure relief of deep coal body weakens its bearing capacity and forces the bearing pressure to move back to the roadway. It is the main reason of lag shock and prominent disaster. Combined with the characteristics of this kind of disaster, the prevention and treatment countermeasures of near field strength pressure relief and strong support, deep control pressure relief and strong monitoring are put forward, and they are applied to 25110 face of a certain mine in Henan province, which ensures the safe mining of the working face.
【作者单位】： 华北科技学院安全工程学院;中国安全生产科学研究院信息中心;北京科技大学土木与环境工程学院;
【基金】：国家自然科学基金资助(51604115;51504096) 河北省省级科技计划项目(16275512) 廊坊市科学技术研究与发展计划项目(2016013116) 河北省自然科学基金资助(E2016508003)
【分类号】：TD311
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