水平应力对突出洞穴形体影响的数值模拟研究  

Numerical Simulation Research on Influence of Horizontal Stress on Cave Shape

作　　者：崔聪 CUI Cong(China Coal Research Institute,Beijing 100013,China;National Key Lab of Coal Resources High Efficient Mining and Clean Utilization,China Coal Research Institute,Beijing 100013,China)

机构地区：[1]煤炭科学技术研究院有限公司 [2]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院)

出　　处：《煤矿安全》2020年第1期171-175,共5页Safety in Coal Mines

摘　　要：为研究水平应力作用下煤岩突出洞穴形体特征,深入地认识煤与瓦斯突出机制,应用平煤八矿突出现场的洞穴形体特征与数值模拟结果进行分析比较,证明了数值模拟方法的准确性与可行性,得到不同水平应力σ_H条件下突出洞穴形体的孕育特征。实验结果表明:突出洞穴形体走向长度及倾向长度随着水平应力σ_H的增长呈指数函数形式增长,且走向长度增速相对较快,当水平应力σ_H达到28 MPa时,曲线增速有明显提升;孔口长度与随着水平应力σ_H的增长呈线性函数形式增长,且增速较慢。To study the shape characteristics of the coal and rock under the horizontal stress, thoroughly understand the mechanism of coal and gas outburst, the analysis and comparison of cave shape characteristics and numerical simulation results in the outburst site of Pingdingshan No.8 coal mine are made to prove the accuracy and feasibility of the numerical simulation method, furthermore, the development characteristics of the shape of the caves can be obtained under the conditions of different conditions of horizontal stress σ_H. The experimental results show that trend length and inclination length of the outburst caves increase exponentially with the increase of horizontal stress σ_H, and the trend length increases faster, when the horizontal stress σ_H reaches 28 MPa, the growth rate of the curve is obviously improved;the hole length increases linearly with the increase of the horizontal stress σ_H, and the growth rate is slow.

关 键 词：水平应力 煤与瓦斯突出 洞穴形体 孕育扩展 数值模拟 

分 类 号：TD712[矿业工程—矿井通风与安全]