摘要
为分析缓倾斜煤层条件下煤矿地下水库煤柱坝体的影响因素,建立煤矿地下水库煤柱坝体力学模型,划分地下水库煤柱坝体在复杂应力环境下的强度分区,构建煤体的理想弹塑性应变软化模型,区分煤体的破坏过程阶段,推导煤柱坝体合理宽度的理论计算公式,并以灵新煤矿一采区煤矿地下水库煤柱坝体合理尺寸问题为例,分析不同因素对煤柱坝体理论宽度的影响规律。结果表明:与煤矿地下水库运行期间的储水因素(储水时间、储水高度及水源情况)相比,煤矿地下水库所处煤层的地质条件(厚度及埋深)对煤柱坝体合理宽度的影响要更大。
This paper conducted a comprehensive investigation into the factors influencing coal pillar dams in underground reservoirs of slowly inclined coal seams.The following tasks were accomplished:establishing a mechanical model for coal pillar dams,determining the strength division of coal pillar dams under complex stress environments,constructing an ideal elasticplastic strain softening model for coal bodies,distinguishing the stages of the damage process of coal bodies,deriving a theoretical formula for determining the appropriate width of coal pillar dams,conducting an engineering application in LingXin coal mine to address the issue of determining the optimal size of coal pillar dams,and analyzing the impact of various factors on the theoretical width of coal pillar dams.The results revealed that the geological conditions,such as the thickness and burial depth of the coal seam where the underground reservoir is located,exerted a significant influence on the appropriate width of coal pillar dams.In comparison,factors related to water storage(e.g.,water storage time,water storage height,and water source)during the operation of the coal mine's underground reservoir had a lesser impact.
作者
吴宝杨
曹志国
于利强
李鹏
王雁冰
左畅
WU Baoyang;CAO Zhiguo;YU Liqiang;LI Peng;WANG Yanbing;ZUO Chang(State Key Laboratory of Groundwater Protection and Utilization by Coal Mining,National Energy Group,Beijing 102209,China;National Institute of Low Carbon and Clean Energy,Beijing 102211,China;School of Mines,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;CHN Energy Shendong Coal Group Co Ltd,Yulin,Shaanxi 719315,China;School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2024年第2期277-284,共8页
Journal of Mining & Safety Engineering
基金
新疆维吾尔自治区重点研发任务专项项目(2022B03028-3)
煤炭开采水资源保护与利用国家重点实验室开放基金项目(GJNY-21-41-06)。
关键词
地下水库
煤柱坝体
采动应力
理论计算
影响因素
underground reservoir
coal pillar dam
mining stress
theoretical calculation
influencing factor
