正断层力学性质的构造应力分析

Tectonic stress analysis of normal faults mechanic characteristic

煤层正断层是地台区煤层中常见的一种构造类型,在矿井突水淹井、煤层瓦斯赋存和煤与瓦斯突出等矿井灾害研究及煤矿生产中具有重要意义.作者用力学分析的方法研究了正断层形成的两种应力状态,指出正断层具有张性和剪性两种力学性质,并以剪性为主;构造应力场的空间作用状态是影响断层性质的决定因素.

Normal faults which are common type Of tectonic in area of coal seam are important in water outburst, gas preservation and coal and gas outburst in coal mining. In the paper, two states of stress of the formation of normal faults are studied by the method of mechanic analysis, and two mechanic characteristic in normal faults are found, which are shearing stress and tensile stress, and the later is the main. And the character of faults is determined by the space state of tectonic stress fields.