深部矿井地应力场分布规律及其在冲击地压预测中的 应用

以徐州张小楼矿井埋深1200m深部采区为例,在区域地应力场宏观分析基础上,用AE法测试了采区不同深度岩层地应力值,采用软岩地应力估算方法估算了不同岩层中地应力值大小;采用数值模拟法,对采区深部地应力场进行了反演计算。在此基础上,测试分析了主采煤层冲击倾向性指标,评价了深部开采冲击地压危险性并进行了预测分区。研究成果对指导该矿井深部安全生产具有重要意义,对我国其他深部矿井开采冲击地压预测预报具有普遍指导意义。

DISTRIBUTION LAW OF IN-SITU STRESS FIELD IN ENGINEERING SUBZONE OF DEEP COAL MINE AND APPLICATION IN FORECAST OF OUTBURST

This paper studied the deep diggings of ZhangXiaolou coal mine XuZhou which the distance between coal seams of the research area and floor is over 1200m. On the base of analyzing the macroscopical in-situ stress field, the paper tested the in-situ stress of terranes and the rule that in-site stress transformation following depth was concluded. The paper also put forward a practical method which can be used to preliminarily estimate in-situ stress value in strata.The paper made use of nonlinear finite element program calculating the horizontal section and two vertical section of typical mining level. On this condition, the paper tested and analyzed the energy liability to rock burst of the mostly coal seams. The paper appraised outburst fatalness zone of main coal seam in research area. The content was important to future safety production of the coal mine. Moreover the whole research method had wide guiding significance for other deep coal mine level.