复合顶板锚杆支护的叠加支护方法

The use of overlapping support in the application of bolting support in composite roof

通过研究锚杆作用机理和顶板破坏机理 ,提出一种通过不同长度锚杆 (锚索 )锚固叠加形成的叠加支护理论 ,以解决复合顶板的支护难题 ,并通过实际应用数据说明了叠加支护的优越性。认为复合顶板的锚杆支护能充分利用锚杆的长度、韧性、刚度等属性 ,形成了高强度、高弹性的稳定承载体 ,基本解决了复合顶板的强度低、扩容变形量大、扩容应力大。

On the basis of a study on the bolting function and the law of roof rupture, this paper puts forward a superposed support theory realized by the superposed support based on applying bolts and anchoring cables that are of varied lengths. This is done in a bid to solve the tough problem of support in composite roof. In this study, real data used in work practice are employed to explain the advantages of superposed support. This paper thus holds that bolting support used in composite roof may make full use of the positive characters of the bolts such as their length, rigidity and toughness, etc. to form a kind of stable support that is of high strength and high elasticity. In this way, the tough problem is solved with composite roof support due to the low strength, larger distortion creep, larger distortion stress and poor stability of the composite roof.