rockburst geodynamic environment stress field tectonic conca

  本文关键词：京西煤田冲击地压的地质动力环境，由笔耕文化传播整理发布。

京西煤田冲击地压的地质动力环境

Geodynamic environment of rockburst in western Beijing coalfield

[1] [2] [3] [4]

HAN Jun,ZHANG Hong-wei,LAN Tian-wei,LI Sheng （College of Mining Engineering ,Liaoning Technical University , Fuxin 123000,China）

辽宁工程技术大学矿业学院,辽宁阜新123000

文章摘要：为了确定京西煤田冲击地压灾害发生的地质动力环境,分析了京西煤田的地质构造、新构造运动、地应力场、地壳应变能,计算了京西煤田各矿井构造反差强度,定量评估了京西煤田的地质动力环境,讨论了京西煤田冲击地压的形成机制。研究表明,京西煤田属于现代地壳隆升区,新构造运动强烈;煤田最大主应力明显高于全国平均水平,且最大主应力与最小主应力的差别显著;京西煤田处于地壳高应变密度能区域,地壳积累了高的弹性应变能;京西构造凹地反差强度大于0.5,该区域具有发生冲击地压的地质动力环境,各矿井具有发生冲击地压的地质动力条件。京西煤田地质动力环境下的冲击地压是煤岩体在高构造应力条件下以块体整体突然破坏而快速释放能量的过程。

Abstr：To determine the rockburst＇s geodynamic environment of western Beijing coalfield,analyzed geological structure,the neo-tectonic movement,stress field,crustal strain energy,calculated contrast of tectonic concave,assess of the geodynamic environment,and discussed the mechanism of rockburst. Research shows that western Beijing coalfield belongs to modern crustal uplift areas,the neo-tectonic movement is intensive; maximum principal stress is significantly higher than the average value,and the difference of maximum principal stress and minimum principal stress is significant; and the crustal strain energy density is higher than others because of high elastic strain energy. The contrast of tectonic concave is greater than 0. 5,it shows that western Beijing coalfield has the geodynamic condition of rock burst. The rockburst of western Beijing coalfield is coal and rock sudden and rapid damage and release of energy as a whole block at high tectonic stress conditions.

文章关键词：

Keyword：:rockburst geodynamic environment stress field tectonic concave

课题项目：国家自然科学基金资助项目（51104085）; 辽宁省自然科学基金资助项目（201204407）; 辽宁省高等学校优秀人才支持计划资助项目（LJQ2013035）

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  本文关键词：京西煤田冲击地压的地质动力环境，由笔耕文化传播整理发布。