工作面贯通前矿压调整时剩余煤柱稳定性分析

发布时间：2019-01-23 16:21

【摘要】：为避免工作面贯通及回撤过程中顶板再次来压,保证回撤通道围岩稳定,首先分析贯通前不同矿压调整措施的适用条件,在此基础上建立末采剩余煤柱力学分析模型,求解得出煤柱临界宽度与围岩赋存条件及物理力学参数、工程相关参数及末采基本顶破坏形式等相关参数的函数关系式。经过分析发现,基本顶断裂位置、工作面埋深、岩层性质以及采煤高度等对末采阶段巷道围岩稳定性控制起到关键作用,在贯通前采取矿压调整,特别需要进行停采调整时,应对上述主要影响因素给予充分考虑,保证停采过程中煤柱稳定性。
[Abstract]:In order to avoid the roof pressure in the process of coal face penetration and retreat, and to ensure the stability of surrounding rock in the retreat passage, the applicable conditions of different adjustment measures of mine pressure before the penetration are analyzed, and the mechanical analysis model of the remaining coal pillar in the end mining is established on this basis. The functional relations between the critical width of coal pillar and the occurrence conditions of surrounding rock, the physical and mechanical parameters, the engineering parameters and the failure form of the basic roof of the coal pillar are obtained. After analysis, it is found that the basic top fault location, the depth of the face, the properties of the strata and the height of the coal mining play a key role in controlling the stability of the surrounding rock of the roadway in the stage of the end mining. The adjustment of the rock pressure is adopted before the completion, especially when the adjustment of the stoppage is needed. The main influencing factors mentioned above should be fully considered to ensure the stability of coal pillar during stoppage.
【作者单位】：西安科技大学建筑与土木工程学院;
【基金】：陕西省教育厅科研计划项目(2013JK0961)
【分类号】：TD322

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