摘要
为得出煤柱对下层煤层开采的影响规律,采用有限元分析软件ANSYS对煤柱下方煤层开采模拟分析。得出煤柱下方煤层为应力升高区;随工作面推进距离的增加,工作面前方应力升高区的应力值增加;开采煤柱下方煤层时,工作面前方会形成双重应力升高,易发生动力灾害,应加强支护。并确定了煤柱对下煤层的影响范围。这为巷道选择合理支护形式和支护参数提供了依据,对实现煤层安全开采有一定的意义。
In order to get the effective laws of coal pillar on the lower coal seam mining,the lower coal seam mining was simulated by using software ANSYS.Conclusions are drawn as follows: the seam below pillar is the stress increasing zone;as the face advanced distance increases,stress values of the stress increasing zone front of the working place increases;when it comes to mining coal seam below pillar,double stress increasing zone will be formed in front of the working place and the dynamic disaster is active in this place,the support strength should be strengthened and the influence scope of pillar on the lower coal seam should be determined.The study provides theoretic supports for the rational support form and timbering parameter of the tunnel.it makes sense for safely mining.
出处
《中国地质灾害与防治学报》
CSCD
2013年第2期83-86,共4页
The Chinese Journal of Geological Hazard and Control
基金
国家重点基础研究发展计划(973计划)(2010CB226803)
国家自然科学基金青年项目(51204090)
关键词
煤柱
数值模拟
应力集中
pillar
numerical simulation
concentrating stress
