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针对阳泉矿区综放工作面护巷煤柱宽度不合理,巷道变形严重,复修频率高等问题,采用数值模拟及现场实测的方法分析了不同宽度煤柱下工作面采空区侧向围岩结构特征以及煤柱侧向应力分布规律,确定了综放工作面护巷煤柱的合理宽度为5.5 m,优化设计了回采巷道的支护方案,并在阳泉二矿80509综放工作面进行了工业性试验。研究成果为综放工作面成功实施小煤柱护巷技术,提高煤炭资源回收率提供了技术借鉴。
In view of the problems of unreasonable coal pillar width, serious roadway distortion and high frequency of rehabilitation in fully mechanized top coal caving face in Yangquan mining area, the lateral surrounding rock structure of goaf with different width coal pillars is analyzed by numerical simulation and field measurement Characteristics and pillar lateral stress distribution, determine the reasonable width of coal pillar for roadway protection in fully mechanized top coal caving face is 5.5m, and optimize the support scheme of mining roadway, and carried out the industrial Sexual test. The research results provide a technical reference for the successful implementation of the technology of small pillar protection roadway in fully mechanized coal caving face to improve the recovery rate of coal resources.