摘要
掌握复杂条件下大倾角大采高工作面围岩运动规律是保证安全回采的前提条件。以宁东矿区清水营矿大倾角“三软”富含水大采高工作面为背景，根据现场勘查、室内实验和现场监测成果，建立了基于倾角变化的FLAC^3D数值模型，计算分析了开采扰动过程中大倾角大采高覆岩应力与变形演化的特殊规律，确定了工作面周期来压步距为10～15m左右，为安全开采提供了科学依据。
Rock movement rule of large mining height face in deep coal seam under complex environment is the key technology to ensure safe mining. Based on large mining height face of Qingshuiying coal mine in Ningdong region which is deep three-soft and rich-in-water coal seam, combined with insite investigation, laboratory test and file monitoring, the numerical model of FLAC^3D is established in which the coal seam inclination angle is variable, and the stress-displacement evolution laws of deep and larger mining height face＇s adjacent rock during advancing and disturbance is analyzed. The periodic weighting pace distance is defined in 10 - 15 m before face. All these studies provide scientific basis for safe mining.
出处
《西安科技大学学报》
CAS
北大核心
2010年第4期388-392,共5页
Journal of Xi’an University of Science and Technology
基金
国家自然科学基金项目(10772144)
教育部博士点基金项目(20096121110001)
教育部新世纪优秀人才支持计划资助项目(NCET-04-972)
陕西省教育厅重点实验室资助项目(09JS018)
关键词
“三软”富水煤层
大采高
数值模型
围岩运动规律
three-soft and rich-in-water coal seam
large height mining
numerical model
law of adjacent rock
