| 双侧采空不规则煤柱稳定性分析 |
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| 引用本文： | 顾士坦,魏宝贞,蒋邦友,台连海.双侧采空不规则煤柱稳定性分析[J].煤矿安全,2020(3):216-220. |
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| 作者姓名： | 顾士坦 魏宝贞 蒋邦友 台连海 |
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| 作者单位： | ;1.山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地;2.山东科技大学矿业工程国家级实验教学示范中心;3.山东科技大学矿业与安全工程学院 |
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| 基金项目： | 山东省重点研发计划资助项目(2019GSF111038);山东省自然科学基金面上资助项目(ZR2018MEE009);国家重点研发计划资助项目(2016YFC0801403)。 |
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| 摘 要： | 为确定某矿3303工作面不规则煤柱处于两侧采空状态时的稳定程度,通过数学模型对不规则煤柱最小安全尺寸及煤柱稳定性系数进行计算,在此基础上,以数值模拟对不规则煤柱两侧采空状态下的应力变化规律展开分析。结果表明:煤柱最小安全尺寸为31.2 m,大于3303工作面推进36.5 m范围内不规则煤柱尺寸;煤柱稳定性系数为1.14,根据煤柱稳定性判别指标判定煤柱为稳定状态;不规则煤柱应力随工作面推进距离增大呈上升趋势,最大应力值与理论计算煤柱承载强度最小值基本一致;综合评定双侧采空状态下,不规则煤柱能够保持稳定。
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| 关 键 词： | 不规则煤柱 数值模拟 煤柱安全尺寸 双侧采空 煤柱稳定系数 |
Stability Analysis of Irregular Coal Pillars in Bilateral Goaf |
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| GU Shitan,WEI Baozhen,JIANG Bangyou,TAI Lianhai.Stability Analysis of Irregular Coal Pillars in Bilateral Goaf[J].Safety in Coal Mines,2020(3):216-220. |
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| Authors: | GU Shitan WEI Baozhen JIANG Bangyou TAI Lianhai |
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| Affiliation: | (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology,Shandong University of Science and Technology,Qingdao 266590,China;National Demonstration Center for Experimental Mining Engineering Education,Qingdao 266590,China;College of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao 266590,China) |
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| Abstract: | In order to determine the stability degree of irregular coal pillars in the state of goaf on both sides of working face,the minimum safety size of irregular coal pillars and the stability coefficient of coal pillars are calculated by mathematical model.On this basis,the stress variation law of irregular coal pillars in the state of goaf on both sides is analyzed by means of numerical simulation.The results show that the minimum safe size of coal pillar is 31.2 m,which is larger than the irregular size of coal pillar in the range of 36.5 m in 3303 working face.The stability coefficient of coal pillar is 1.14.According to the criterion of coal pillar stability,the coal pillar is in stable state.The stress of irregular coal pillar increases with the advancing distance of working face,and the maximum stress value is basically consistent with the theoretical minimum value of bearing strength of coal pillar.The irregular coal pillars can keep stable under the condition of bilateral goaf. |
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| Keywords: | irregular coal pillar numerical simulation safety dimensions of coal pillar bilateral goaf stability coefficient of coal pillar |
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