(1. College of Energy and Mining Engineering，Shandong University of Science and Technology，Qingdao，Shandong 266590，China；2. State Key Laboratory of Coal Mining and Clean Utilization，Beijing 100013，China；3. Zhengtong Coal Mine，Shandong Energy Zikuang Mining Group Co.，Ltd.，Xianyang，Shaanxi 713600，China；4. Zhaizhen Coal Mine，
Shandong Taishan Energy Group Co.，Ltd.，Xintai，Shandong 271204，China)
Abstract：In order to solve the problem of low resource recovery rate of traditional double entry driving and tight replacement of gob-side entry driving，taking the 11502 working face of the first mining area of Lower group coal mine in Zhaizhen Coal Mine as the engineering test object，this paper innovatively put forward an arrangement method of double entry driving with a narrow coal pillar in the middle，and constructed a narrow coal pillar high-strength composite reinforcement support technology. By adopting comprehensive research methods such as theoretical analysis，experimental test combined with numerical simulation，the arrangement principle of double entry driving with a narrow coal pillar and a narrow coal pillar reinforcement support technology are deeply researched and explored. The results show that the technology of double entry driving with a narrow coal pillar can realize the sequential succession of working faces and effectively improve the recovery rate in the mining area. The technology of narrow coal pillar composite reinforcement support is mainly based on advanced broken roof and relieved pressure，the improvement the bearing capacity of the narrow coal column side by anchor cable through coal pillar，and the high-strength composite reinforcement support of the concrete-filled steel tubular columns，which prevents the narrow coal pillars from prematurely entering a plastic state and then losing overall stability，and can effectively maintain long-term stability. Based on the combined structure theory of overburden rock，a coal pillar-roof structural mechanics model was established，the distribution law and magnitude of the abutment pressure above the coal pillar were studied，and a design method for the double entry driving with a narrow coal pillar reinforcement support was established. The numerical simulation proves that compared with the traditional gob-side entry driving，this technology can better control the deformation of surrounding rock of roadway，and the deformation of coal pillar body and roadway have been effectively reduced.
黄万朋1，2，赵同阳1，江东海1，郭晓胜3，郑永胜4，王学文1. 双巷掘进留窄小煤柱布置方式及围岩稳定性控制技术[J]. 岩石力学与工程学报, 2023, 42(3): 617-629.
HUANG Wanpeng1，2，ZHAO Tongyang1，JIANG Donghai1，GUO Xiaosheng3，ZHENG Yongsheng4，WANG Xuewen1. Arrangement of double entry driving with a narrow coal pillar in the middle and stability control technology of surrounding rock. , 2023, 42(3): 617-629.
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2023, Vol. 42 
