摘要
针对综放工作面端头区顶煤安全放出问题,基于东滩煤矿3303工作面煤岩层地质赋存条件,采用理论分析与数值计算相结合,分析了综放工作面端头区煤岩应力场分布特征、煤岩失稳垮落规律及回采巷道稳定性等。研究表明:综放工作面端头区顶煤自工作面中部侧向回采巷道侧,放出难度增大;随着端头放煤区域向巷道侧扩大,回采巷道表面位移呈增大趋势。确定了端头区顶煤的可放性及可放出区域范围,为现场端头区顶煤的放出提供了理论依据。
In order to ensure the safe release of top coal in the end zone of fully mechanized caving face,theoretical analysis and numerical calculation were combined to analyze the stress field distribution of coal and rock,law of coal-rock caving and mining roadway stability based on geological occurrence conditions of 3303 mining face in Dongtan Coal Mine.According to the results,top coal releasing difficulty increases in the area from middle part mining face to mining roadway;as the face end area extends to the roadway side,the surface displacement of mining roadway tends to increase; the top coal cavability and releasing area in face end area were determined.
出处
《煤炭工程》
北大核心
2017年第1期77-79,83,共4页
Coal Engineering
基金
中国矿业大学煤炭资源与安全开采国家重点实验室自主研究课题项目(SKLCRSM12X03)
江苏省教育厅科技项目(13KJA520007)
关键词
综放工作面
端头区
煤岩失稳垮落规律
放煤区域
fully-mechanized caving face
face end area
law of coal and rock unstability
caving area
