采矿与安全工程学报2012，Vol.29Issue(4)：466-473,8.
大采高沿空留巷围岩分位控制对策与矿压特征分析
Strata Behavior and Control Countermeasures for the Gob-Side Entry Retaining in the Condition of Large Mining Height
摘要
Abstract
Combined with the production conditions of 24207 working face in Shaqu mine, distribution characteristics of roofs stress for gob-side entry retaining influenced by mining height was studied by the method of theoretical analysis and numerical simulation. Gob-side entry retaining is in the area of stress decreasing zone of bearing pressure area. The impact scope and range to the rock gets more widely with the increase of mining height of working face. Acute deformation will occur during the mining period for gob-side entry retaining, and the contraction of area will reach to 55.3% in the condi-tion of large mining height. Effective supporting measures are required according to the deformation characteristics of each side in gob-side entry retaining. The optimal cross-height ratio and the high strength supporting system with the core of high pre-stress could be helpful to control the deformation of surrounding rock reasonably. The observation data shows that the violent mining influence extent to gob-side entry retaining is the ranges from working face to the rear of 200 m, which is similar to the length of working face in the industrial experiment. The deformation continues to grow and roof pres-sure continues to increase until the length extents 250 m the strata behaviors tends to stable.关键词
大采高/沿空留巷/围岩控制/矿压显现Key words
large mining height/ gob-side entry retaining/ surrounding rock control/ strata behaviors分类
矿业与冶金引用本文复制引用
薛俊华,韩昌良..大采高沿空留巷围岩分位控制对策与矿压特征分析[J].采矿与安全工程学报,2012,29(4):466-473,8.基金项目
国家重点基础研究发展计划(973)项目(2010CB735506) （973）
