摘要
为解决高瓦斯工作面双U型巷道布置中煤柱损失大、相邻工作面复用回采巷道维护困难的难题,综合采用理论分析、数值计算和现场试验的方法,研究得到煤柱宽度对相邻两工作面之间煤柱内复用巷道围岩应力分布和变形特征的影响规律:随着巷道一侧煤柱宽度的增加,巷道围岩垂直应力峰值向一侧移动,并逐渐远离巷道;当巷道一侧煤柱较小时,巷道以窄煤柱帮变形和顶板下沉为主,随着煤柱宽度增加,底鼓增大并成为巷道主要变形。以煤柱内应力峰值比值为指标,分析煤柱宽度与巷道稳定性的关系,并将不同宽度煤柱进行了稳定性分区。研究成果成功应用于工程实践,为类似条件下巷道布置提供依据。
In order to minimize coal resource loss and mitigate the support difficulty of reused gateroad in double-U shaped gateroad layout of high gassy coal mine,a numerical simulation is used to investigate the stress distribution and deformation rule of reused gateroad with respect to different pillar widths.Results show that with one side pillar width increasing,vertical stress peak in surrounding rock moves close to the gateroad and then gets away in one direction.When the pillar is slender,the deformation of slender rib and roof are larger than that of the wider rib and floor.Floor heave increases and becomes the main convergence with pillar width increasing.With stress peak ratio in coal pillar as an indicator,the division of barrier pillar width reveals the relationship between pillar width and gateroad stability.Research results are successfully applied to an engineering practice,and it provides guidance for gateroad layout in the similar situation.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2012年第10期3081-3086,3150,共7页
Rock and Soil Mechanics
基金
国家自然科学基金项目(No.51174195)
煤炭资源与安全开采国家重点实验室自主研究课题资助(No.SKLCRSM08X04)
中国矿业大学青年科研基金资助项目(No.2008A002)
国家建设高水平大学公派研究生资助项目(留金[2010]3006)
中央高校基本科研业务费专项资金资助(No.2010QNA31)
