高预应力锚杆锚索组合支护技术在运输下山掘进支护中的应用

Application of High Prestressed Bolt and Cable Combinations Support Technology in Transport Downhill Excavation Support

以阜生煤业一采区运输下山为工程背景,采用FLAC3D模拟了巷道顶板在高预应力锚杆锚索组合支护作用下的应力场分布特征,研究得出预应力及其扩散是锚杆支护发挥主动锚固作用的关键性因素,锚杆与锚索组合支护能显著扩大有效压应力区范围,并在此基础上运用动态信息设计法设计出高预应力锚杆锚索组合支护参数应用于井下,支护效果理想。

Fusheng coal in a mining area transportation down as engineering background, using FLAC3 D simulated roadway roof in the high prestressed anchor anchor combined support under the stress field distribution, research results and their proliferation is prestressed anchor play a proactive role in supporting the key factors anchor, anchor and anchor combined support can significantly expand the ef- fective compressive stress zone, and on this basis, the use of dynamic information design method to design high prestressed anchor an- chor combined support parameters used in the underground, the supporting results are satisfactory .