红庆梁矿12301胶运巷耦合支护研究

Research on Coupling Support of 12301 Rubber Conveying Crossheading in Hongqingliang Coal Mine

随着开采深度的增加,软岩巷道占比逐年加大,合理的软岩巷道支护方案为矿井安全高效开采提供了重要保障。为了研究掘进巷道不同数量锚杆、锚索耦合支护的效果,以鄂尔多斯红庆梁矿12301胶运巷掘进巷道为研究对象,利用FLAC^(3D)软件研究在不同数量锚杆、锚索联合支护条件下,12301胶运巷掘进巷道围岩塑性区和围岩应力规律。结果表明:在方案1的支护条件下,减少2根帮锚杆,围岩剪切破坏区明显增大,而在减少两根顶锚杆的情况下,围岩剪切破坏区变化不大。方案2在方案1减少两根顶锚杆的前提下,巷道顶板最大垂直应力增加了20%,巷道两帮最大垂直应力增加了0.3%.方案3在方案1减少2根帮锚杆的前提下,巷道顶板最大垂直应力增加了40%,巷道两帮最大垂直应力增加了0.93%.

With the increase of mining depth,the proportion of soft rock roadway is increasing year by year.Reasonable support scheme of soft rock roadway provides an important guarantee for safe and efficient mining of mine.In order to study the effect of different numbers of bolt and anchor cable coupling support in excavation roadway,the excavation roadway of 12301 glue transport crossheading in Hongqingliang Mine of Ordos is taken as the research object.FLAC^(3D) software was used to study and analyze the plastic zone and stress law of surrounding rock of 12301 glue transport roadway under the condition of different number of bolt and anchor cable combined support.The results show that under the support condition of scheme one,the shear failure zone of surrounding rock increases obviously by reducing two side bolts,while the shear failure zone of surrounding rock changes little by reducing two top bolts.On the premise of reducing two roof bolts in scheme 1,the maximum vertical stress of roadway roof increased by 20%,and the maximum vertical stress of roadway two sides increased by 0.3%.In the third scheme,under the premise of reducing the two side bolts,the maximum vertical stress of the roadway roof increased by 40%,and the maximum vertical stress of the two sides of the roadway increased by 0.93%.