摘要
根据石门掘进穿煤层的主要特征,引入层裂体的理论,将工作面煤体作为理想的圆盘状结构,且把掘进产生的动力扰动简化为谐波,考虑瓦斯压力并建立了动力扰动诱发煤与瓦斯突出的双尖点突变模型,导出了其失稳条件,确定了煤体的临界安全厚度,分析了动荷载振幅、频率对煤体临界安全厚度的影响。研究结果表明,煤与瓦斯突出事故中煤体的失稳不仅取决于内部的瓦斯压力、自重以及围岩特性,而且与动荷载的振幅和频率有密切的关系。
According ture, the coal mass to the main features of crossdrift cutting through seams and by inducing the theory of layer-crack struc in working face was to a harmonic wave. Meanwhile,, consid duced by dynamic disturbance was bull mass was determined, and the impacts taken as an ideal circular plate, and the dynamic disturbance in tunneling was simplified ering the gas pressure, the double cusps catastrophe model of coal and gas outburst in-duced by dynamic disturbance was built, and its failure conditions were deduced. Then, the critical safety thickness of coal of vibration amplitude and frequency on the critical safety thickness of coal mass were analyzed. The results proved that the failure of coal mass in the accident of coal and gas outburst not only depended on the inner gas pressure, the gravity and the property of surrounding rock, but also had a close relation with the amplitude and frequency of dynamic load.
作者
于美鲁
左宇军
王浩
邬忠虎
潘超
林健云
税越
李伟
YU Meilu;ZUO Yujun;WANG Hao;WU Zhonghu;PAN Chao;LIN Jianyun;SHUI Yue;LI Wei(Mining College,Guizhou University,Guiyang,Guizhou 550025,China;State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China)
出处
《矿业研究与开发》
CAS
北大核心
2018年第8期88-92,共5页
Mining Research and Development
基金
国家自然科学基金项目(51574093
51774101)
贵州大学研究生创新基金项目(研理工2017083)
贵州省高层次创新型人才培养(百层次)项目(黔科合人才(2016)4011号)
贵州省应用基础研究计划重大项目(JZ字[2014]2005-1)
国家"十二五"科技支撑项目(2012BAB08B06)
贵州省科技合作计划项目(黔科合LH字[2016]7465号)
关键词
煤与瓦斯突出
突变理论
动力扰动
临界安全厚度
Coal and gas outburst
Catastrophe theory
Dynamic disturbance
Critical safety thickness
