【摘要】 为确定宁夏某矿12203工作面沿空掘巷合理的煤柱宽度以及沿空巷道可靠的围岩控制技术,以沿空掘巷大、小结构理论为基础,通过数值模拟分析并根据工程实践,提出了采用5 m小煤柱进行护巷的方法,设计了沿空掘巷支护技术方案并配合注浆加固技术以提高煤柱的承载能力。实践表明,注浆加固技术可以有效地控制沿空掘巷的围岩稳定性。更多还原

【Abstract】 It is necessary for 12203 working face in a coal mine to determine the reasonable coal pillar width of roadway driving along next goaf and its dependable control technology of surrounding rocks.Based on stability principle of big and small structures and numerical simulation combined with engineering practice,the proposed scheme of 5 m coal pillar is used to protect the roadway driving along next goaf.In addition,the supporting technology solutions are put forward and grouting reinforcement technology is adopted to improve supporting capacity of pillar in this roadway.Practice shows that grouting reinforcement technology could control the stability of surrounding rocks effectively in roadway driving along next goaf.更多还原