锚杆支架组合支护在煤矿破碎顶板条件下的应用分析

随着社会形势发展,与我国的科学技术的不断增长,锚杆支架技术在我国的煤矿开采工作中也得到普及和广泛采用。不过随煤矿开采工作的难度与深度的提高,煤矿开采深处的开采技术难度压力也随之提升,在煤矿开采过程中,因为顶板的破碎而造成的人员伤亡概率也在提升增加。因此必须增强提高在煤矿开采工作中的顶板支护技术,才能在一定程度上保障开采煤矿的工作人员。

回采巷道煤帮锚杆支护问题探讨

分析了煤帮稳定性对锚杆支护系统的影响和回采巷道煤帮变形的破坏形式以及煤帮锚杆支护的机理与支护特点，并探讨了煤帮锚杆支护应注意的几个问题。

应力场对锚杆支护影响的数值分析

本文应用快速拉格朗日元法对回采巷道锚杆支护作大变形数值分析，通过六组１６２种模型，系统地分析了回采巷道在不同地应力条件，不同应力状态下的变形特征。通过模拟结果的分析比较得出了一些有益的结论。

矿井巷道支护技术的发展趋势

煤矿中使用的拱形和框形支架结构具有严重的缺点,因此采掘作业的技术进步受到阻碍。1965～1983年,苏联煤炭工业中采准巷道的掘进工程总量缩减了3743公里,而采用装配式钢筋混凝土支架的巷道工程量从407公里减至124公里(见表1)。采用锚杆支架的工程量大大增长(从113公里增长3546公里)。

Entry roof truss-bolt system test under the gob of contiguous seams

Roof bolt support system has been widely applied in the No.7, 9 seam in Caozhuang coal mine. However, it has not been able to be applied in the No.10-2 seam since the small interburden （2 m） between No.9 and No.10-2 seam. The No.9 and No.10-2 seams are contiguous seams. The No.9 seam has been mined out and the No.10-2 seam will be mined under the gob of the No.9 seam. The roof strata of the No.10-2 seam may have been weakened and fractured due to the shear failure caused by the No.9 seam mining activities. The steel beam sets spaced at 0.8 m have been used to support the entry of the No.10-2 seam. In order to speed up the advance rate and cut entry development cost, a test area, using roof bolt in conjunction with truss-system, was successfully conducted. This paper presents the support system design, application of designed system, and the test results. Test results provide a cheaper, quicker, and safer way to support entry for the No.10-2 seam.