相邻综采工作面采空区覆岩压力分布特征研究

    Pressure distribution characteristics of overlying strata in adjacent fully mechanized mining face

    • 摘要: 工作面推采后,采空区压力要经历1个从增长到稳定的过程,在此期间,采空区压力大小分布及增长速率对工作面安全生产及周边巷道支护有着直接影响。为深入研究相邻采面推采后采空区覆岩压力分布特征,通过现场数据实测以及理论分析相结合的方法,对相邻综采工作面采空区覆岩压力分布特征进行研究,得到了采空区压力在走向及倾向方向上的分布规律。结果表明:采空区覆岩压力稳定后,采空区倾向覆岩压力呈“□”类抛物线型分布,具体表现为采空区中部>采空区下部>采空区上部;采空区走向覆岩压力变化分为压力值初始增长期、压力值缓慢上升期、压力值快速增长期、压力值逐步稳定期4个阶段。

       

      Abstract: After the coal mining face is mined, the pressure transmitted by the surrounding rock in the goaf will experience a process from growth to stability, during this period, the growth rate and pressure distribution of overburden pressure in goaf have a direct impact on the safety production of working face and the surrounding roadway support. In order to deeply study the overburden pressure distribution characteristics of goaf after push mining in adjacent mining faces, this paper studies the overburden pressure distribution characteristics of goaf in adjacent fully mechanized mining faces through the combination of field data measurement and theoretical analysis, and obtains the distribution law of goaf pressure in strike and dip direction. The results show that: after the overburden pressure of goaf is stable, its tendency overburden pressure presents “□” parabolic distribution, which is specifically expressed as the overburden pressure in the middle of goaf > the overburden pressure in the lower part of goaf > the overburden pressure in the upper part of goaf; the change of overburden pressure in goaf is divided into four stages: initial growth period of pressure value, slow rise period of pressure value, rapid growth period of pressure value and gradual stabilization period of pressure value.

       

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