【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。更多还原

【Abstract】 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.更多还原