矿山分析与鉴定技术在地质勘查工程中的应用

矿产资源是国家重要的战略资源,对经济发展和国家安全具有重要作用。地质勘查是发现、评价和开发矿产资源的重要一环,其目的是合理利用矿产资源,支持国民经济的发展。近年来,随着勘查技术的不断发展和研究深入,新的矿山鉴定方法不断涌现。矿山鉴定是地质勘查中的一项重要工作,其目的是对矿山样品进行鉴定,确定其品种、成分、性质和用途,为勘查提供科学依据。因此,在地质勘查工程中,矿山鉴定方法的应用至关重要。本文重点探讨矿山分析与鉴定技术在地质勘查工程中的应用。

矿山水文地质分析及防灾策略探讨

在全球资源短缺和环境保护日益重要背景下,如何在矿山开发中合理规划和利用水资源,降低灾害风险,保障矿山可持续发展,已然成了矿业领域的热点问题。因此,本文主要就矿山水文地质特征及防灾措施进行探讨,以期为提升矿山的灾害防范能力和资源利用效率提供有益参考。

湖南省矿山采选业生产运行状况的大数据分析

近年的实践和实际分析运作表明,以湖南省矿山开发利用统计数据库作为全省矿山采选业生产运行状况大数据来源,开展基于大数据基础上的矿山采选业生产运行状况分析,可以得出全省矿山采选业开工状况,生产能力及其实现情况,生产矿山的盈利、盈亏平衡、亏损停产状况,可以全面了解全省矿山采选业的运行情况,并为宏观决策提供重要参考。

矿山沉陷监测克里金插值分析研究

重点介绍克里金插值方法的数学原理,对普通克里金、泛克里金及其各自所含不同的变异函数模型,应用a RCGi S中空间分析工具对鲁西煤矿工作面开采沉陷监测数据插值生成栅格模型。使用交叉验证法对各模型模拟精度加以检验,并比对误差,得出最适用于本次Co RS站监测数据的克里金模型并为同类矿山沉陷监测数据插值提供参考借鉴。

关于数字化矿山系统分析及智能化在矿井中的应用探讨

随着社会经济的快速发展,对于能源的需求量也越来越大,在对矿山进行开采的过程中,智能化设备得到了广泛的应用,实现了数字化矿山系统,智能技术在矿山系统的应用不仅提高了电气设备的自动化程度,而且可以提高开采工程工作的安全性和稳定性,对促进电气工程自动化具有积极作用,提升矿井的生产效率,结合现有的实践经验和新技术,以及未来的发展方向,矿山系统将逐步实现网络化,智能化、数字化综合系统。本文主要简单介绍了数字化矿山系统以及电气智能化的概念,探讨了数字化矿山系统的必要性以及意义,论述了数字化矿山系统的基本原则,对我国矿山行业电气智能化应用现状进行了分析,阐述了矿山应用电气自动化技术的优势,并结合实际应用情况,介绍了电气智能化在煤矿生产的应用情况,仅供相关人士参考。

建设智能矿山云的探讨与分析

智能矿山云是包含云数据中心、云管平台、智能融合集成平台以及众多子分系统的集合,将5G通信、大数据技术、物联网技术应用于煤矿生产和决策辅助,推动煤矿装备向智能化、高端化发展,结合利用专业生产流程管控软件、数据分析软件、智能设备控制软件,各系统智能化决策和自动化协同运行,已成为煤矿提质增效的重要手段和发展趋势。

矿山运输设备动力学特性分析

伴随着科学技术的不断发展,为保证矿产资源稳定化、高效化提供,社会各界逐渐提升了对矿山运输设备的关注程度,旨在对其进行全面、深入的分析,明确矿山运输设备的基本运行现状,同时分析设备动力学特性,科学、合理控制设备振动频率,延长矿山运输设备的使用寿命。对矿山运输设备构建力学模型、数学模型、仿真模型以及仿真研究结论系统进行分析,并提出矿山运输设备车体振动控制的研究策略,进而为矿山运输设备相关研究人员提供一定参考。

浅谈绿色矿山建设

建设“绿色矿山”是矿山建设的一次革命。笔者在文章中就绿色矿山应达到的标准以及系统分析法在绿色矿山建设过程中的应用作了简单介绍和总结,以期对同行在今后的地质灾害评估、矿山设计及治理等工作中有所帮助。

解析矿山地质工作在矿山生产过程中的作用

随着时代不断发展,矿产事业也在不断进行,在整个矿产市场中矿产资源是不可缺少的部分。若是想提高矿产事业的质量与效率,就需要不断进行完善与科学的管理,在矿山地质方面有着不断强化,这样矿山地质才能展现效益的最大化。本文把矿山工作实际内容作为基础,对矿山地质工作在矿山生产过程中的作用进行了分析,并且提出了相关方案。

探究智慧矿山建设架构体系及其关键技术

在我国现代化进程中,传统的煤矿矿山企业在现代化信息建设之中遇到了如行业内部没有足够的信息化标准、各企业之间信息封闭等问题,成为了现代化进程的阻碍.为了建设信息化矿山、智慧矿山,本文通过从数据采集到数据分析、执行乃至后期的指挥决策等多方面、多环节的架构体系来描述每个体系中具体所对应的环节,并且利用空间信息、智慧煤矿以及三维模型等具体信息技术的应用来建设现代矿山、智慧矿山.

RGIS在数字矿山中的应用

介绍RGIS系统环境及其制图流程,从数据的提取、图层的设计、数据的输入等方面,论述了RGIS在数字矿山中的实践应用。

小净距交叉重叠矿山法隧道开挖步序研究与实践

结合深圳地铁5号线太怡区间的工程实例对小净距交叉重叠隧道的开挖步序进行理论研究，并结合实际施工情况总结开挖步序隧道开挖本身的安全及对周边环境的影响，提出各作业面合理的的开挖步序。

Predicting pillar stability for underground mine using Fisher discriminant analysis and SVM methods

The purpose of this study is to apply some statistical and soft computing methods such as Fisher discriminant analysis （FDA） and support vector machines （SVMs） methodology to the determination of pillar stability for underground mines selected from various coal and stone mines by using some index and mechanical properties, including the width, the height, the ratio of the pillar width to its height, the uniaxial compressive strength of the rock and pillar stress. The study includes four main stages： sampling, testing, modeling and assessment of the model performances. During the modeling stage, two pillar stability prediction models were investigated with FDA and SVMs methodology based on the statistical learning theory. After using 40 sets of measured data in various mines in the world for training and testing, the model was applied to other 6 data for validating the trained proposed models. The prediction results of SVMs were compared with those of FDA as well as the measured field values. The general performance of models developed in this study is close; however, the SVMs exhibit the best performance considering the performance index with the correct classification rate Prs by re-substitution method and Pcv by cross validation method. The results show that the SVMs approach has the potential to be a reliable and practical tool for determination of pillar stability for underground mines.

Bayes discriminant analysis method to identify risky of complicated goaf in mines and its application

A Bayes discriminant analysis method to identify the risky of complicated goaf in mines was presented. Nine factors influencing the stability of goaf risky, including uniaxial compressive strength of rock, elastic modulus of rock, rock quality designation （RQD）, area ratio of pillar, ratio of width to height of pillar, depth of ore body, volume of goaf, dip of ore body and area of goal, were selected as discriminant indexes in the stability analysis of goal. The actual data of 40 goals were used as training samples to establish a discriminant analysis model to identify the stability of goaf. The results show that this discriminant analysis model has high precision and misdiscriminant ratio is 0.025 in re-substitution process. The instability identification of a metal mine was distinguished by using this model and the identification result is identical with that of practical situation.

容量法测定锡的可能干扰因素及应对措施

容量法测锡有快速简便的优点,但一些复杂矿石中常有钨、铜、砷、锑、铋、锰、钒、钛、铬等元素干扰测定。文章通过容量法测定锡过程中产生的实验现象分析可能存在的干扰元素及去除方法。

Analytical solution for stress and deformation of the mining floor based on integral transform

Following exploitation of a coal seam, the final stress field is the sum of in situ stress field and an excavation stress field. Based on this feature, we firstly established a mechanics analytical model of the mining floor strata. Then the study applied Fourier integral transform to solve a biharmonic equation,obtaining the analytical solution of the stress and displacement of the mining floor. Additionally, this investigation used the Mohr–Coulomb yield criterion to determine the plastic failure depth of the floor strata. The calculation process showed that the plastic failure depth of the floor and floor heave are related to the mining width, burial depth and physical–mechanical properties. The results from an example show that the curve of the plastic failure depth of the mining floor is characterized by a funnel shape and the maximum failure depth generates in the middle of mining floor; and that the maximum and minimum principal stresses change distinctly in the shallow layer and tend to a fixed value with an increase in depth. Based on the displacement results, the maximum floor heave appears in the middle of the stope and its value is 0.107 m. This will provide a basis for floor control. Lastly, we have verified the analytical results using FLAC3 Dto simulate floor excavation and find that there is some deviation between the two results, but their overall tendency is consistent which illustrates that the analysis method can well solve the stress and displacement of the floor.

Analysis of Water Insulating Effect of Compound Water-Resisting Key Strata in Deep Mining

The problem of water preservation in mining and the prevention of water-bursts has been one of the more important issues in deep mining. Based on the concept of water-resisting key strata, the mechanics model of the key strata is established given the structural characteristics and the mechanical properties of the roof rock layers of the working face in a particular coal mine. Four other models were derived from this model by rearranging the order of the layers in the key strata. The distribution characteristics of stress, deformation, pore pressure and the flow vector of all the models are computed using the analytical module of fluid-structure interaction in the FLAC software and the corresponding risks of a water-burst are analyzed. The results indicate that the water-insulating ability of the key strata is related to the arrangement of soft and hard rocks. The water-insulating ability of the compound water-resisting key strata (CWKS) with a hard-hard-soft-hard-soft compounding order is the best under the five given simulated conditions.

FEM Simulation on Artificial Freezing of Seepage Ground

The coupling mechanism in freezing process of seepage ground was studied and a simplified coupling math model was proposed. The nonlinear and coupling problems of PDEs were well solved using the exponential function, error function and normal distribution function, and a series of FEM equations of coupled fields of temperature and seepage were deduced and put forward. With the example of shaft ground freezing, the formation of freezing wall in seepage ground was simulated.

Shear stress distribution and characteristics of deformation for shear band-elastic body system at pre-peak and post-peak

The distributed shear stress and the displacement across shear band, the evolution of plastic zones, and the load-carrying capacity of rock specimen were investigated in plane strain direct shear test according to Fast Lagrangian Analysis of Continua （FLAC）. And then the shear displacement distribution in normal direction of system composed of localized shear band and elastic rock was analyzed based on gradient-dependent plasticity. The adopted failure criterion was a composite of Mohr-Coulomb criterion, that is, the relation between tension cut-off and postpeak constitutive of rock was linear strain-softening. Numerical results show that shear stress field approximately undergoes three different stages. At first, shear stress is only concentrated in the middle of top and base of specimen. Next, shear stress in the middle of specimen tends to increase, owing to superposition of shear stresses. Interestingly, two peaks of shear stress appear far from the loading ends of specimen, and the peaks approach with the increase in timestep until elements at the center of specimen yield. Finally, relatively lower shear stress level is reached in large part of specimen except in the regions near the two ends. As flow stress decreases, the analytical shear displacement distribution in shear band based on gradient-dependent plasticity becomes steeps outside the band, it is linear and its slope tends to decrease. These theoretical results qualitatively agree with that of the present numerical predicted results. Main advantage of the analytical solution over the numerical results according to FLAC is that it is continuous, smooth and non-linear （except at elastic stage）.

Micro-Climate Evaluation System in Thermal Mines

A fuzzy evaluation method was used to evaluate the microclimate in thermal mines. A theoretical model of a microclimate evaluation system was designed and membership functions of the evaluation indices in the system were established. An analytical hierarchy process (AHP) was used to analyze the weight of the evalua- tion indices and their methods of calculation. Software for this evaluation system was developed and used for the evaluation of the microclimate of 714 sections in a mine. It is shown that the evaluation results correspond com- pletely with the actual situation. This evaluation system and the software can be applied in thermal mines.