摘要
本文以“大跨度矩形巷道锚喷支护”的相似模型试验为依据,在详细分析了围岩内部应变分布特点和破坏变形特征之后指出:矩形巷道直接顶板不是“梁”的存在形式,而是一个卸压区;围岩破坏主要集中在矩形巷道的角帮处,是支护的重点部位;锚杆支护具有良好的可缩性和承载力,能够用于大跨度矩形动压煤巷。
A simulating test of shotcrete roof bolt used in wide rectangular drifts is presented in this paper. Based on the detailed analysis for crack patterns and strain distribution in sur-rounding rocks, the following three points are obtained:
1. the immediate roof of rectangular drift is a distressed zone instead of a beam;
2. corners and ribs of drifts are the severely broken area where are the main parts for supporting;
3. bolt-shoterete can be used in wide rectangular drifts because of its yieldability and supporting capacity.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
1990年第2期72-79,共8页
Journal of China University of Mining & Technology
关键词
巷道
锚喷
支护
模拟
岩体
破坏
bolt-shotcrete support, simulating test, bolting, surrounding rocks failure
