特厚煤层掘进巷道强矿压显现机理及防治技术研究

发布时间：2018-03-22 23:18

本文选题：特厚煤层　切入点：掘进巷道　出处：《煤炭科学技术》2017年08期 　论文类型：期刊论文

【摘要】：为确保特厚煤层巷道安全掘进,采用理论分析、数值模拟和现场实测相结合的方法,研究了掘进巷道强矿压显现的力学机制,进行了综合防治研究与实践。结果表明:在近距离煤层群开采条件下,受上部煤层工作面遗留煤柱的影响,造成下部煤层掘进巷道围岩产生高集中应力,是掘进巷道发生强矿压显现的主要影响因素;随着上部遗留煤柱水平距离的增大,掘进巷道围岩最大钻屑量呈降低趋势,回风巷(距离上部遗留煤柱10 m)是运输巷(距离上部遗留煤柱40 m)最大钻屑量的1.2倍。综合防治实践表明,采取的煤层卸压、加强支护、优化设计、加强监测等措施是合理的,可实现高应力条件下巷道围岩的有效控制,为类似条件掘进巷道强矿压防治提供了参考。
[Abstract]:In order to ensure the safety of roadway driving in extra thick coal seam, the mechanical mechanism of strong rock pressure in roadway is studied by combining theoretical analysis, numerical simulation and field measurement. The research and practice of comprehensive prevention and control are carried out. The results show that under the condition of close distance coal seam group mining, the surrounding rock of roadway in the lower coal roadway produces high concentration stress due to the influence of coal pillar left over from the upper coal seam working face. Along with the increase of horizontal distance of coal pillar, the maximum amount of debris in surrounding rock of tunneling roadway is decreasing. The return air roadway (10 m from the upper coal pillar) is 1.2 times of the maximum amount of drilling debris in the transportation roadway (40 m from the upper coal pillar). The comprehensive prevention and control practice shows that the measures taken to relieve the pressure of coal seam, strengthen the support, optimize the design and strengthen the monitoring are reasonable. It can realize the effective control of roadway surrounding rock under the condition of high stress, and provide a reference for the prevention and treatment of strong rock pressure of roadway under similar conditions.
【作者单位】：中煤大同能源有限责任公司塔山煤矿;煤炭科学技术研究院有限公司安全分院;煤炭资源高效开采与洁净利用国家重点实验室;
【基金】：国家自然科学基金资助项目(51304117,51404140)
【分类号】：TD322;TD353

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