煤矿综采工作面内隐伏断层稳定性研究

Research on the Stability of Hidden Faults in Fully Mechanized Coal Mining Face

针对煤矿综采工作存在安全风险概率较高的问题,本文综合分析与研究了煤矿综采工作面内隐伏断层稳定性的影响因素。根据实验区域的地质条件与力学特性,本文还设计了煤矿综采工作面内隐伏断层的力学模型,并进行了正交实验。实验结果显示,随着综采深度、隐伏断层倾角的不断增加,隐伏断层结构受到的垂直应力逐渐增大,导致隐伏断层出现了沿煤层走向的不规则裂隙,甚至发生塑性破坏,严重影响了隐伏断层的稳定性。而煤矿综采工作面与隐伏断层之间岩层或土层的厚度越大,隐伏断层所受应力会逐渐减小,有效阻止了隐伏断层结构中不规则裂隙的产生,提高了隐伏断层的稳定性。

In response to the high probability of safety risks in fully mechanized coal mining,this paper comprehensively analyzes and studies the influencing factors of the stability of hidden faults in the fully mechanized coal mining face.Based on the geological conditions and mechanical characteristics of the experimental area,this paper also designes a mechanical model of hidden faults in the fully mechanized coal mining face and conductes orthogonal experiments.The experimental results show that with the depth of fully mechanized mining and the inclination angle of hidden faults continue to increase,and the vertical stress on the structure of hidden faults gradually increases,resulting in irregular cracks along the coal seam strike and even plastic damage,seriously affecting the stability of hidden faults.The thicker the rock or soil layer between the fully mechanized coal mining face and the hidden fault,the less stress the hidden fault bears,effectively preventing the generation of irregular cracks in the hidden fault structure and improving the stability of the hidden fault.