Stability analysis and control technology of gob-side entry retaining with double roadways by filling with high-water material in gently inclined coal seam
Shengrong Xie1
En Wang2
Dongdong Chen1
Hui Li3
Zaisheng Jiang3
Hongzeng Yang4
1.School of Energy and Mining Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources,China University of Mining and Technology-Beijing,Beijing 100083,China2.School of Energy and Mining Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;Department of Civil Engineering,University of British Columbia,Vancouver,BC V6T 1Z4,Canada3.School of Energy and Mining Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China4.Hebei Coal Science Research Institute Corporation Ltd.,Xingtai 054000,China
摘要：To ameliorate the defects of insufficient support resistance of traditional roadside filling bodies for gob-side entry retaining(GER),overcome the inability to adapt to the deformation of surrounding rock,and isolate the goaf effectively,a new type of high-water material as a roadside filling body for GER technology with double roadways was proposed.The instability analysis and control technology of GER with double roadways by filling high-water material into a gently inclined coal seam were studied.The basic mechanical properties of the new high-water material were investigated through laboratory experi-ments,and their main advantages were identified.The reasonable width of the roadside filling wall of a high-water material was obtained by combining ground pressure observation and theoretical calculations.The distribution characteristics of the stress and plastic zone of surrounding rock of GER after being stabilized by the disturbance of the working face were studied using numerical simulations,and the failure range of GER by filling with high-water material was revealed.Based on this,a coupling control technology of anchor cables and bolts+single props+metal mesh+anchor bolts is proposed.Through the coupling methods of arranging borehole peeping and observing the convergences of surrounding rock,the results demon-strate that GER with double roadways by filling with a 1.8-m-wide high-water material has a good control effect.The above research will play an active role in promoting the application of high-water materials in GER roadside filling.
机标关键词：technologystabilitymaterialanalysiscontroldoublewithseam
论文发表日期：2022-08-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：18( 147-164 )
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