摘要
针对煤矿上山受采动影响的特点,对大安山煤矿锚固控制上山受采动影响时的稳定性进行了实测研究。结果表明,在老顶来压前夕,上山内顶底板移近速度出现高峰,锚杆锚固力将达到最大锚固力状态;老顶来压完成以后,上山内顶底板移近速度迅速下降,而锚固力基本保持不变,巷道围岩变形量还将以稳定蠕变形态缓慢增加,大致滞后一个月后基本停止。因此,上山锚杆支护设计和煤柱尺寸的留设必须充分考虑上覆岩层的运动状态。
In this paper, the stability of surrounding rock of bolted rise entry. affected by mining is studied based on field measurement in Da - Anshan Mine, the results show that at the eve of main roof weighting, a peak velocity of the convergence between roof and floor of the rise entry appears, the reinforcing force of bolt arrives at the maximum value nearly; after main roof weighting, the velocity of convergence between roof and floor of the rise entry descends rapidly, the reinforcing force of bolt keeps constant nearly, the deformation of surrounding rock of rise entry increases slowly in a stable creep form and continues for near a month. Thus, the movement state of overlying strata must be taken into account to the bolted reinforcement design of rise entry affected by mining action as well as the size design of remained pillar.
出处
《矿业研究与开发》
CAS
北大核心
2006年第2期27-28,48,共3页
Mining Research and Development
基金
国家自然科学基金重点项目(50534080)
山东省自然科学基金项目(Y2004F11)
山东科技大学矿山灾害预防控制教育部重点实验室开放基金
山东省"泰山学者"建设工程专项经费联合资助
