摘要
红会四矿地质条件复杂,综放工作面仰采坡度大,造成煤壁片帮和端面冒顶非常严重,是制约工作面安全高效生产的主要因素之一。采用FLAC3D计算分析了6种不同仰采坡度下工作面围岩应力的分布特征。结果表明,当仰采坡度超过20°时,工作面前方支承压力峰值点加速向煤壁移近,当仰采坡度35°时,支承压力峰值点距煤壁仅1.7 m;煤壁内拉应力区也迅速扩大,2.5 m高处煤壁内拉应力区深度已经达到4.4 m。
Honghui NO.4 Coal Mine has complex geological conditions, the fully-mechanized caving face has uphill steep slope, the rib spalling and end-face fall are very serious. This is one of main factors that restrict the effective production. The face stress and characteristics with six different uphill slope mining is calculated and analyzed by FLAC3D. The results show that, when the overhand slope exceeds 20~, the abutment pressure peaks of face accelerate to move to the coal wall, when the uphill slope reaches 35~, the abutment pressure peak is only 1.7m from the coal wall, the tensile stress within the coal wall is also rapidly expanding, 2.5m high tensile stress zones within the coal wall has reached the depth of 4.4m.
出处
《煤炭技术》
CAS
北大核心
2011年第11期69-71,共3页
Coal Technology
基金
国家自然科学基金资助项目(50574073)
关键词
仰采综放
应力分布
支承压力
数值模拟
uphill fully-mechanized caving mining
stress distribution
abutment pressure
numerical simulation
