煤矿巷道锚杆支护的参数优化

Parameter optimization of bolting for coalmine roadways

目前煤矿巷道锚杆支护设计尚存在不足,造成锚杆锚固能力未能充分发挥,支护材料浪费和支护成本偏高。基于围岩与锚杆共同作用原理,通过锚杆受力监测,对锚杆支护参数进行设计,有助于充分发挥锚杆支护的优越性。针对陕西某煤矿巷道条件,通过计算和锚杆受力监测,调整锚杆参数的方法,进行锚杆支护参数设计,实现锚杆支护的参数优化。应用结果表明利用这一方法能够准确、快速地得到锚杆的支护参数,充分发挥了支护锚杆的承载能力,实现了支护优化。本文工作对改进煤矿巷道支护设计具有一定的实际意义和工程价值。

Currently,the shortage exists in the design of bolting for coalmine roadways yet,which results in the poor performance of rock bolt,waste of bolting material and high cost.Basing on the interaction principle of surrounding rock and rock bolt,the superiority of bolting can be performed wholly if the parameter design of bolting is determined by in-situ measurement.In the paper,the optimal parameters of bolting are determined with the method by which the bolting parameters are calculated theoretically and revised based on the measurement value of bolt force,according to the roadway condition of a coalmine in Shaanxi province.The application shows that the optimal bolting parameters can be obtained quickly by the suggestion in the paper.In this case,the bolts will perform wholly support capacity and the optimization of bolting realized.The finding is significant in practice and valuable in mining engineering.