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Mechanism and control of water seepage of vertical feeding borehole for solid materials in backflling coal mining

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International Journal of Mining Science and Technology 2013年第5期23卷 675-679页

作者： zhou yuejin Guo Hongzeng Cao Zhengzheng Zhang Jiangong State Key Laboratory of Geomechanics and Deep Underground Engineering China University of Mining & Technology School of Mines China University of Mining & Technology

To solve the problem of water seepage of vertical feeding borehole for solid materials,we established the fluid-solid coupling dynamic model of groundwater flowing in rock mass adjacent to the vertical feeding *** with the engineering geological conditions,we built a numeral model to study the influence rule of the aquifer hydraulic pressure and seepage location of feeding borehole on the amount of seepage with fnite element numerical *** results show that the nonlinear relationship is presented among the amount of seepage,the seepage location and aquifer hydraulic *** higher the aquifer hydraulic pressure is,the closer the distance between seepage location and aquifer is,and the faster the harmful levels of aquifer will *** practice,we calculated the allowable seepage of feeding borehole by the optimum moisture content and natural moisture content of backflling materials,and then determined the protection zone of feeding borehole,so the moisture content of backflling materials can be controlled within the scope of optimum moisture content.

关键词： Backflling coal mining Vertical feeding borehole Mechanism of water seepage Optimum moisture content

Top-coal deformation control of gob-side entry with narrow pillars and its application for fully mechanized mining face

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International Journal of Mining Science and Technology 2016年第3期26卷 417-422页

作者： Qi Fangkun zhou yuejin Li Jiawei Wang Erqian Cao Zhengzheng Li Ning School of Mines China University of Mining & Technology Xin'an Coal Co. Ltd.Zaozhuang Mining Group State Key Laboratory Geomechanics & Deep Underground Engineering China University of Mining & Technology

A mechanical model to control the top-coal deformation is established in accordance with the structural characters of the gob-side entry surrounding rock for the fully-mechanic top-coal caving; the analytical solution of top coal roof-sag curve is deduced with Winkler elastic foundation beam model. By means of a calculating and analytic program, the top coal roof-sag values are calculated under the conditions of different supporting intensities, widths of narrow pillars and stiffness of top coal; meanwhile, the relationship between the roof-sag values and supporting intensity, width of narrow pillars and stiffness of top coal is analyzed as well. With the actual situation of the gob-side entry taken into consideration, the parameters of top-coal control are determined and a supporting plan is proposed for the top-coal control,which is proved to be reliable and effective by on-site verification. Some theoretical guidance and advice are put forward for the top-coal deformation control in gob-side entry for fully mechanized top-coal caving face.

关键词： Fully mechanized top-coal caving Narrow pillar Gob-side entry Top coal Deformation control

Safety analysis of building foundations over old goaf under additional stress from building load and seismic actions

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International Journal of Mining Science and Technology 2014年第5期24卷 713-718页

作者： Xu Ping Mao Xianbiao Zhang Minxia zhou yuejin Yu Bangyong State Key Laboratory for Geomechanics & Deep Underground Engineering China University of Mining & Technology School of Civil Engineering Henan Polytechnic University

Additional displacement of the building foundations over old goaf are prone to happen under the addi- tional loads induced by new buildings, weakening-rock mass by mining and seismic actions, which will cause serious damage to the buildings. In order to analyze the safety of the building foundations safety over the old goaf. the structure characteristics of the strata over the old goaf was investigated and the instability conditions of overhanging rocks upon old goaf were also analyzed in this paper. The results indicate that the stability of overhanging rocks is remarkably decreased by the interactions of mining fractures, earthquake force and building load, in addition, the settlement of the foundations over old goal is increased by the instability of overhanging rocks. According to the location of a new power plant in Yima Mine and its ambient conditions, we defined the influence scope of old goal via resistivity tomography. Based on the seismic parameters of the construction site, a numerical FLAC3d model of the building foundation under the seismic actions and building load was developed. The numerical results are obtained as follows： the foundation of the main power house meets the requirement of 6° seismic fortification intensity： however, under 7° seismic fortification intensity, the maximum differential settlement of foundation between the neighboring pillars is close to the maximum allowable value, while the seismic fortification intensity reaches 8°, but the safety requirements will not be satisfied.

关键词： Seismic actions Additional stress Old goaf Foundation Settlement

Control Mechanism of Surface Subsidence and Overburden Movement in Backfilling Mining based on Laminated Plate Theory

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Computers, Materials & Continua 2017年第3期53卷 175-186页

作者： Zhengzheng Cao Feng Du Ping Xu Haixiao Lin Yi Xue yuejin zhou School of Civil Engineering Henan Polytechnic UniversityJiaozuo 454000China School of Energy and Engineering Henan Polytechnic UniversityJiaozuo 454000China State Key Laboratory of Coal Resources and Safe Mining State Key Laboratory for Geomechanics&Deep Underground EngineeringChina University of Mining and TechnologyXuzhou 221116China

The backfilling mining technology is a type of high-efficiency coal mining technology that is used to address the environmental issues caused by the caving mining *** this paper,the mechanical model of symmetrical laminated plate representing the overburden movement caused by the backfilling mining technology is established,and the governing differential equation of the motion of the overburden is *** boundary conditions of the mechanical model are put forward,and the analytical solution of the overburden movement and surface subsidence is *** numerical model of the overburden movement and surface subsidence,under mining with backfilling,is established by means of the FLAC3D numerical software,which aims to systematically study the influence of backfilling compactness,mining thickness,and mining depth on the overburden movement and surface subsidence in backfilling *** the compactnessηis less than 70%,the overburden movement and surface subsidence is greater,while whenηis greater than 70%,the overburden movement and surface subsidence is reduced *** this basis,the control mechanism of surface subsidence and overburden movement in backfilling mining is *** suitable backfilling compactness is the key to controlling surface subsidence and overburden movement in backfilling mining.

关键词： Symmetrical laminated plate theory surface subsidence overburden mo vement backfilling mining

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石膏矿老采空区塑性支撑系统的突变失稳分析

岩石力学与工程学报 2018年第11期37卷 2548-2555页

作者：徐晓鼎周跃进庞顺中国矿业大学力学与土木工程学院江苏徐州221008 中国矿业大学深部岩土力学与地下工程国家重点实验室江苏徐州221008 中国矿业大学矿业工程学院江苏徐州221008

采空区支撑系统稳定性研究是保证石膏矿区安全生产的关键,为此构建塑性区的矿柱–岩梁支撑系统,将岩梁和矿柱分别视为能量释放体和能量耗散体,并运用能量理论构建支撑系统尖点突变模型,得出支撑体系相关的失稳判别条件。研究结果表明:... 详细信息

采空区支撑系统稳定性研究是保证石膏矿区安全生产的关键,为此构建塑性区的矿柱–岩梁支撑系统,将岩梁和矿柱分别视为能量释放体和能量耗散体,并运用能量理论构建支撑系统尖点突变模型,得出支撑体系相关的失稳判别条件。研究结果表明:支撑系统失稳是能量释放、耗散与支撑系统变形不协调的结果,当α>0时,系统能量释放与系统变形协调,支撑系统按路径I由下叶稳态渐进过度到上叶稳态的准静态过程;当α塑性区宽度>矿房跨度>矿柱宽度>矿柱高度矿。结合工程实例,根据各区开采几何参数不同对采空区进行分类,并运用突变理论对各类采空区支撑系统稳定性进行分析,得出D类区域为危险采区,与现场调研结果一致。

关键词：采矿工程塑性区突变理论敏感性

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自组织团队的群决策过程模型研究

科技进步与对策 2010年第11期27卷 20-24页

作者：李民周跃进南京大学工程管理学院江苏南京210093

以自组织团队的群决策过程的组织方式和基本机理为研究对象,根据自组织团队的特点,系统分析了自组织团队群决策的特征,结合有关群决策组织过程的研究文献,按照复杂自适应理论,针对自组织团队遇到的复杂非结构化问题,建立了自组织团队群... 详细信息

以自组织团队的群决策过程的组织方式和基本机理为研究对象,根据自组织团队的特点,系统分析了自组织团队群决策的特征,结合有关群决策组织过程的研究文献,按照复杂自适应理论,针对自组织团队遇到的复杂非结构化问题,建立了自组织团队群决策过程模型,并用案例验证了该模型的有效性。

关键词：自组织团队群决策决策过程模型

基于证据理论的企业信息系统实施后的绩效评价研究

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情报学报 2012年第12期31卷 1314-1323页

作者：周跃进贾立双南京大学工程管理学院南京210093

外部环境的变化，迫使企业投身信息化建设的浪潮，信息系统已经成为企业日常生产经营所不可或缺的管理工具，但是其实施之后的绩效评价仍然是个难题。为此，在前人研究的基础上，遵循信息系统绩效评价的一般原则，发掘能够客观反映企业... 详细信息

外部环境的变化，迫使企业投身信息化建设的浪潮，信息系统已经成为企业日常生产经营所不可或缺的管理工具，但是其实施之后的绩效评价仍然是个难题。为此，在前人研究的基础上，遵循信息系统绩效评价的一般原则，发掘能够客观反映企业绩效水平的关键因素，采用理论分析、频度分析、专家咨询、相关分析、主成分分析等方法，从直接经济效益、间接经济效益和社会效益三个维度构建评价指标体系；并提出了基于证据理论的绩效评价方法，详细描述了其工作原理及评价步骤，比较了证据理论方法和其他评价方法的优劣；最后通过具体的应用案例验证了该方法的有效性。

关键词：企业信息系统实施绩效评价证据理论

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复杂网络病毒防治系统设计与实现

计算机应用与软件 2008年第2期25卷 97-98,102页

作者：李静周跃进南京农业大学工学院江苏南京210031 南京大学工程管理学院江苏南京210093

如何加强整个复杂网络系统的防治病毒能力已经成为影响一个系统的成功应用的重要因素,而随着我校在合理应用现有资源提高实验水平的同时,则无可避免地建设了一个较为复杂的网络系统。主要集中研究如何根据多实验室复杂的网络实际结构,... 详细信息

如何加强整个复杂网络系统的防治病毒能力已经成为影响一个系统的成功应用的重要因素,而随着我校在合理应用现有资源提高实验水平的同时,则无可避免地建设了一个较为复杂的网络系统。主要集中研究如何根据多实验室复杂的网络实际结构,综合考虑全网络的各个环节,将防范网络病毒的具体措施布置到每个环节,以确保对病毒安全防范的快速反应综合系统的实现。

关键词：实验室建设网络安全网络病毒资源整合访问控制

黄河流域九省区废弃矿井抽水蓄能利用潜力评估

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煤田地质与勘探 2022年第12期50卷 51-64页

作者：卞正富朱超斌周跃进徐雨农中国矿业大学环境与测绘学院江苏徐州221116 中国矿业大学深部岩土力学与地下工程国家重点实验室江苏徐州221116

针对我国关闭矿井资源利用率低、蓄电储能需求日益增长的问题,废弃矿井抽水蓄能技术是实现资源二次开发利用,提升电网调峰能力的有效手段。基于废弃矿井抽水蓄能电站工作原理与发展现状,提出在黄河流域九省区利用废弃矿井建设抽水蓄能... 详细信息

针对我国关闭矿井资源利用率低、蓄电储能需求日益增长的问题,废弃矿井抽水蓄能技术是实现资源二次开发利用,提升电网调峰能力的有效手段。基于废弃矿井抽水蓄能电站工作原理与发展现状,提出在黄河流域九省区利用废弃矿井建设抽水蓄能电站的半地下式、全地下式2种模式。通过综合考虑空间、地质、水文、社会、经济与资源等影响因素,提出废弃矿井抽水蓄能电站选址评价指标体系,并进行黄河流域废弃矿井抽水蓄能电站实例分析。基于2016—2020年黄河流域九省区的废弃煤矿资料,利用废弃矿井抽水蓄能电站静态效益与动态效益计算方法,定量评估黄河流域九省区废弃煤矿抽水蓄能电站建设的开发潜力。结果表明:(1)黄河流域九省区能源资源丰富,现阶段满足电力供应需求,但火电仍是电力供应主体且水电发展进入瓶颈阶段;(2)影响废弃矿井抽水蓄能电站选址的重要因素为巷道空间体积、上下水库水位差、巷道围岩稳定性、巷道围岩渗透率与地下水循环特征;(3)由黄河流域废弃矿井抽水蓄能电站实例分析可知,其发电效率可达到75.7%,可媲美常规抽水蓄能电站;(4)2016—2020年黄河流域九省区废弃煤矿累计有效可利用井巷空间为4.7×10^(7)m^(3),依据132座废弃矿井基本情况,从统计学角度估算出废弃矿井抽水蓄能电站可利用井巷空间为1.34×10^(7)m^(3),利用其建设抽水蓄能电站年发电量可达3.78×10^(9) kW·h,可满足2021年黄河流域九省区28.4%的弃风、弃光电量的消纳需求,每年直接经济效益约达21.2亿元。综上表明,黄河流域九省区废弃矿井抽水蓄能利用具有可观的发展前景。

关键词：废弃矿井抽水蓄能选址因素指标体系效益分析潜力评估黄河流域