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美国亚拉巴马 Warrior 煤田在采用房柱式开采作业中,由于软底板和薄层直接顶诸不利因素,使巷道经常遭受不稳定的困扰。这项调查涉及的是一个矿在软底板条件下的顶板管理问题。该矿曾发生了几起局部冒顶,也出现了多达0.6m 高的底臌。本文介绍了运用仪器监测和数值模拟所进行的有关底臌、顶板下沉、煤柱沉陷以及底板承载能力试验的综合分析结果。
Warriors in Alabama, U.S.A. In the use of post and column mining operations, the roadway often suffers from instability due to unfavorable factors directly above the soft floor and the thin layer. The survey covered the roof management of a mine under soft floor conditions. Several local tops occurred in the mine, and as many as 0.6m high basements appeared. This paper presents the results of a comprehensive analysis of the tests of bottom 臌, roof subsidence, coal pillar subsidence, and floor carrying capacity using instrumental monitoring and numerical simulation.