充填回收房式煤柱采场煤柱稳定性分析

发布时间：2018-01-21 16:56

本文关键词： 充填回收房式煤柱煤柱稳定性弹性地基充实率　出处：《采矿与安全工程学报》2016年02期 　论文类型：期刊论文

【摘要】：为了提供充填回收房式煤柱采场围岩稳定性分析的理论依据,采用理论分析和数学推导对充填体-煤柱共同支撑下的围岩力学结构进行了研究,发现煤柱区域弹性地基系数kp、充实率φ、顶板抗弯刚度EI、覆岩载荷q是影响煤柱稳定性的主要控制因素。基于弹性地基梁理论建立了顶板岩梁的挠度方程,提出了煤柱区域及充填体的弹性地基系数计算方法,推导出了充实率对煤柱受力、顶板下沉量、采场应力分布特征的计算方程组,并建立了煤柱稳定性的评价公式。
[Abstract]:In order to provide the theoretical basis for the stability analysis of surrounding rock in the stope of backfill house type coal pillar, the mechanical structure of surrounding rock supported by backfill and coal pillar is studied by theoretical analysis and mathematical derivation. It is found that the coefficient of elastic foundation in coal pillar area is Kp, the filling ratio is 蠁, and the bending stiffness of roof is ei. The overburden Q is the main controlling factor affecting the stability of coal pillar. Based on the theory of elastic foundation beam, the deflection equation of roof and slate beam is established, and the calculation method of elastic foundation coefficient of coal pillar area and backfill is presented. The equations for calculating the stress of coal pillar, the amount of roof subsidence and the characteristics of stress distribution in stope are derived, and the evaluation formula for the stability of coal pillar is established.
【作者单位】：中国矿业大学矿业工程学院深部煤炭资源开采教育部重点实验室;
【基金】：国家重点基础研究发展计划(973)项目(2013CB227905) 江苏省“青蓝工程”项目中国矿业大学重大项目培育工程专项项目(2014ZDPY02)
【分类号】：TD323
【正文快照】： 神东矿区在过去相当长时间内,普遍采用房式开采技术,留设煤柱支撑顶板和上覆岩层,导致约70亿t煤炭资源弃于井下。这既造成了国家优质资源的巨大浪费,又易导致井下火灾、矿震等诸多灾害[1-7]。如何安全高效回收房式煤柱已成亟待解决的重大科学与工程技术难题,国内外学者进行诸

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