上保护层煤柱引发被保护层冲击机理研究

发布时间：2018-04-27 22:46

本文选题：煤柱 + 保护层　；参考：《岩土工程学报》2017年09期

【摘要】：长城一矿和峻德煤矿所发生的由保护层煤柱引发冲击的案例表明,保护层煤柱影响范围内仍属高应力区,且工作面上方都存在坚硬的顶板。通过分析两起事故中被保护层煤体的赋存条件,探究发生此类冲击的影响因素。研究表明,典型的保护层煤柱诱发冲击主要有以下两种情况:(1)大采深小层间距下,以"高静应力为主,低动应力诱发"型冲击;(2)中等采深大层间距下,以"高动应力为主、低静应力诱发"型冲击。静力系由煤柱传递的应力和层间岩体的自重应力以及保护层采空区的残余支承压力组成,动力系主要是本煤层已开采工作面形成的侧向支承压力。建立了判断发生冲击地压的评估方法,为此类矿井的开采提供理论依据。并提出了工作面位置设计、合理布置巷道、预前卸压、加强监测的防治措施。
[Abstract]:The case of the impact caused by the protective coal pillar in the first mine and JAD coal mine in the Great Wall shows that the impact area of the protective coal pillar still belongs to the high stress area, and there is a hard roof above the working face. By analyzing the conditions of the coal body in the two accidents, the influence factors of this kind of impact are explored. There are two main cases of shock induced by protective coal pillar: (1) "Gao Jing stress mainly, low dynamic stress induced" type impact under the space of large mining depth and small layer; (2) "high dynamic stress mainly, low static stress induced" type impact under the medium mining depth. The residual bearing pressure of the goaf is composed mainly of the lateral support pressure formed by the mining face of the coal seam. The evaluation method for judging the rock burst is established, which provides the theoretical basis for the mining of this kind of mine, and puts forward the design of the working face position, the rational layout of the roadway, the pre unloading pressure, and the prevention and control measures of the monitoring.

【作者单位】：北京科技大学土木与资源工程学院;甘肃靖远煤电股份有限公司;兖州煤业股份有限公司;
【基金】：国家自然科学基金项目(51674014);国家自然科学基金重点项目(51634001) 国家重点研发计划(2016YFC0801408)
【分类号】：TD324

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