摘要
为维护斜沟煤矿孤岛综采面区段巷道围岩稳定而合理确定煤柱宽度，采用离散元数值UDEC3．0，分析了斜沟煤矿18105超长走向孤岛综采面在不同区段煤柱宽度条件下，巷道围岩在掘进期和回采期的应力分布和位移特征。结果表明，孤岛工作面两侧围岩形成“马鞍形”应力集中区，该区影响范围随巷道埋深增大而增大；在该地质开采条件下，合理的煤柱留设宽15—20m。
In order to set the stability of the surrounding rock in the different the gateway of the fully mechanized coal mining face in the seam island of Xiegou Mine as well as the rational coal pillar width in different sections of the gateway, the discrete element numerical calculation program UDEC30 were applied to simulate and analyze the stress distributions and displacement features of the surrounding rocks during the gateway heading and mining periods under the condition of the coal pillar with in different sections of the 18105 fully mechanized strike coal mining face in the seam island of Xiegou Mine. The analysis results showed that there was a ＂saddle shape＂ stress concentrated zones formed in the surrounding rocks along the two sides of the coal mining face and the influence scope of the stress concentrated zone would be increased with the depth of the mining gateway increased. Under the geological mining condition, the rational width of the coal pillar would be 15 m to 20 m.
出处
《煤炭科学技术》
CAS
北大核心
2009年第6期27-30,共4页
Coal Science and Technology
基金
教育部科学技术研究重点资助项目(109075)
中国矿业大学科技基金资助项目(2006B002)
关键词
孤岛工作面
围岩稳定性
煤柱合理宽度
数值模拟
coal mining face in seam island
stability of gateway surrounding rock
rational width of coal pillar
numerical simulation
