集贤煤田地质构造演化特征及其对冲击地压的影响
Tectonic Evolution Characteristics of Jixian Coalfield and Its Influence on Rock Burst
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摘要: 通过对集贤煤田构造演化及成煤构造特征的分析,结合煤田内部4个矿井不同水平的12个测点的地应力实测结果,得出集贤煤田属以水平应力为主且最大主应力量值大多在30 MPa以上的σH >σh >σv型高地应力场,实测所得地应力数据离散型较大但最大主应力、侧向压力系数以及水平差应力整体上均随深度的增加而增大的规律,从区域构造作用、煤岩结构特征以及局部采场应力特征的角度分析了集贤煤矿冲击地压事故的原因和影响因素,为煤田矿井深部区域动力区划和开拓布局提供了划分依据方向和设计建议。Abstract: Based on the characteristics of tectonic evolution, coal forming activities, the measurement results of in-situ stress at 12 different points in 4 coal mines of Jixian coal mining areas, it’s obtained that the stress measurement data discreteness is very great under the influence of the composite superimposition of multi-stage tectonic movement, the horizontal stress is predominate in depth and the value of maximum horizontal principal stress is more than 30 MPa, the type of stress field belongs to σH>σh>σv. The reason and the influence factors of rock burst accident in Jixian Coal Field was analyzed from the view of regional tectonic stress, the structure of coal rock and local mining stress,which provides development direction and design suggestion for geo-dynamic division and development and layout during mining in deep area.
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Keywords:
- geological structure /
- evolution characteristics /
- in-situ stress /
- rock burst /
- mining stress
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