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Evaluating machine utilization times for roadheaders used in coal mines: Regression and artificial neural network analyses 煤矿掘进机机器使用时间评价:回归与人工神经网络分析
Q4 Engineering Pub Date : 2023-10-17 DOI: 10.30797/madencilik.1310876
Sair KAHRAMAN, Masoud ROSTAMİ, Behnaz DİBAVAR
Roadheaders are extensively utilized for tunnel heading rock engineering applications all over the world. To create a work plan and calculate costs, it is critical to forecast roadheader performance as precisely as possible. Machine utilization time (MUT) is required for the calculation of daily advance rate of roadheaders. This paper investigates the values of MUT for roadheaders used in underground coal mines. The performance measurements were conducted on fifty different locations for axial machines and thirty-nine different locations for transverse machines. MUT values vary from 15 % to 37.5 % with an average of 26.3 % for axial roadheaders, and vary from 6.9 % to 37.9 % with an average of 18.4 % for transvers roadheaders. The average MUT is 25.4% for all measurements. The percentage of average support time approximately equals to the average MUT. Multiple regression and artificial neural network models were also developed for estimating MUT. Concluding remark is that the determined MUT values and the derived estimation models for roadheaders will be very useful for coal miners.
掘进机在世界范围内广泛应用于隧道掘进岩石工程。为了制定工作计划和计算成本,尽可能精确地预测掘进机的性能至关重要。计算掘进机的日进步率需要机器使用时间(MUT)。本文探讨了煤矿井下掘进机的MUT值。性能测量进行了50个不同位置的轴向机和39个不同位置的横向机。轴向掘进机的MUT值从15%到37.5%不等,平均为26.3%;横向掘进机的MUT值从6.9%到37.9%不等,平均为18.4%。所有测量的平均MUT为25.4%。平均支持时间的百分比大约等于平均MUT。此外,还建立了多元回归模型和人工神经网络模型来估计MUT。总而言之,确定的掘进机MUT值和导出的估计模型对煤矿工人是非常有用的。
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引用次数: 0
Dust Pollution Characteristics and Control Measures of Open Pit Coal Mine 露天煤矿粉尘污染特点及控制措施
Q4 Engineering Pub Date : 2023-10-16 DOI: 10.30797/madencilik.1149989
Leng WU, Ziling SONG
In order to solve the problem of dust pollution in open-pit coal mine, this paper studies the characteristics and prevention measures of dust pollution in open-pit coal mine. Firstly, the effects of different phosphorus treatments on pH value and water-soluble phosphorus of dust polluted soil in open-pit coal mine, the effects of different phosphorus treatments on water-soluble lead and zinc, and the effects of different phosphorus treatments on the contents of exchangeable lead and zinc in dust polluted soil were analyzed. On this basis, multi-directional dust pollution control measures with public participation in construction dust supervision and control as the core are put forward. The test results show that after comprehensive treatment, the amount of dust is reduced, and the phosphorus containing substances can repair the polluted soil of open-pit coal mine, and a good soil remediation effect is achieved.
为了解决露天煤矿扬尘污染问题,本文对露天煤矿扬尘污染的特点及防治措施进行了研究。首先,分析了不同磷处理对露天煤矿粉尘污染土壤pH值和水溶性磷的影响,不同磷处理对水溶性铅和锌的影响,以及不同磷处理对粉尘污染土壤交换性铅和锌含量的影响。在此基础上,提出了以公众参与建筑扬尘监管为核心的多方位扬尘污染治理措施。试验结果表明,综合治理后粉尘量减少,含磷物质对露天煤矿污染土壤具有修复作用,取得了较好的土壤修复效果。
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引用次数: 0
Utilization of wastes/by-products as a grinding additive 废物/副产品作为研磨添加剂的利用
Q4 Engineering Pub Date : 2023-10-11 DOI: 10.30797/madencilik.1342929
Serkan ÇAYIRLI, Hasan Serkan GÖKÇEN, Nuri YÜCE, Obaidullah ELCHİ
In this work, the use of water (W) as a grinding additive in addition to waste/by-products such as olive black water (BW) and residue of olive black water (RBW) in calcite dry grinding to be sized in microns was investigated at a laboratory scale. The test results were evaluated based on product fineness, grinding time, liquid material dosage, and powder flowability. The study revealed that the use of any kind of liquid materials tested improved the grinding process compared to the blank condition. Considering RBW, powder flowability increased as its concentration increased. The findings from both the BW and W data revealed that the dose increase does not yield favorable outcomes in relation to the ffp index. Nevertheless, there was a noticeable enhancement in particle fineness.
在实验室规模上,研究了在方解石干磨过程中,除橄榄黑水(BW)和橄榄黑水残渣(RBW)等废/副产物外,用水(W)作为研磨添加剂的应用。测试结果根据产品细度、研磨时间、液体物料用量和粉末流动性进行评价。研究表明,与空白条件相比,使用任何一种被测试的液体材料都改善了磨削过程。考虑RBW,粉末流动性随其浓度的增加而增加。BW和W数据的结果显示,剂量增加对ffp指数没有产生有利的结果。然而,颗粒细度有明显的提高。
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引用次数: 0
Enhancing the bearing capacity of friction anchor bolts through cementitious concrete injection for reinforced support in underground mine 地下矿山注浆加固支护提高摩擦锚杆承载力
Q4 Engineering Pub Date : 2023-10-09 DOI: 10.30797/madencilik.1312485
Soufı AMINE
Friction anchor bolts are commonly used for providing support in underground structures by relying on frictional forces between the bolt and the surrounding rock. This study proposes a method to enhance the efficiency of these bolts by injecting a cement-based mixture comprising cement, sand, and additives. The injection of this mixture into the bolt results in internal expansion, which reinforces the friction and bearing capacity of the bolt. The increased volume exerts a radial force, leading to improved adherence, load transfer, and void filling. Pullout tests were conducted on various rock masses to evaluate the performance of the anchor bolts. The results demonstrate increased pullout resistance with higher rock mass quality and longer cemented bolts. Additionally, the use of a silicate-based additive accelerated the curing time of the cement, enhancing the strength of the bolts. The study also highlights the significant influence of groundwater on the bearing capacity of the bolts. These findings indicate the effectiveness of cemented concrete injection in strengthening friction anchor bolts and their anchorage in underground structures.
摩擦锚杆是地下结构中常用的依靠锚杆与围岩之间的摩擦力提供支护的锚杆。本研究提出了一种通过注入由水泥、沙子和添加剂组成的水泥基混合物来提高这些螺栓效率的方法。将这种混合物注入锚杆会导致内部膨胀,从而增强锚杆的摩擦和承载能力。增加的体积施加径向力,从而改善附着力、载荷传递和空隙填充。对不同岩体进行了拉拔试验,对锚杆的性能进行了评价。结果表明,岩体质量越高,锚固锚杆越长,抗拔能力越强。此外,硅酸盐基添加剂的使用加速了水泥的固化时间,提高了螺栓的强度。研究还强调了地下水对锚杆承载力的显著影响。这些研究结果表明,水泥混凝土注入对地下结构中摩擦锚杆及其锚固的加固是有效的。
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引用次数: 0
Estimating support pressure with finite element and convergence-confinement method for different rock masses 用有限元法和收敛约束法估算不同岩体的支护压力
Q4 Engineering Pub Date : 2023-10-03 DOI: 10.30797/madencilik.1356042
Hüseyin Onur DÖNMEZ, Hakan TUNÇDEMİR
Support pressure is a key factor in the stability of the excavation area during mining and tunneling. The vital thing desired in an underground engineering structure is to ensure that the structure survives safely throughout its lifetime. For this reason, choosing the right support system at the planning stage is very important for the pressure that will affect the support system must be determined with a certain convergence. This article aims to discuss the support pressures by the finite element method and convergence-confinement method and compare the results. A series of two-dimensional finite element models are established to analyze support pressure with different rock masses selected from the literature. The results reveal that since the convergence-confinement method and the finite element method have high-order relationships regarding support pressures and displacements for weak rock masses, the support pressures and the displacement values for similar conditions can be estimated with the convergence-confinement method, which is more practical than the finite element method.
在采矿和隧道施工过程中,支护压力是影响开挖区稳定性的关键因素。在地下工程结构中,最重要的是确保结构在其整个生命周期内安全生存。因此,在规划阶段选择合适的支撑系统是非常重要的,因为影响支撑系统的压力必须具有一定的收敛性。本文旨在用有限元法和收敛约束法讨论支承压力,并对结果进行比较。建立了一系列二维有限元模型,对文献中选取的不同岩体进行支护压力分析。结果表明,由于收敛约束法与有限元法在软弱岩体的支护压力和位移之间存在高阶关系,因此收敛约束法可以估算相似条件下的支护压力和位移值,比有限元法更实用。
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引用次数: 0
Comparison of Conditioned Radial Bases Function Approach and Kriging: Estimation of Calorific Value in a Coal Field 条件径向基函数法与克里格法的比较——煤田发热量的估算
Q4 Engineering Pub Date : 2023-07-31 DOI: 10.30797/madencilik.1315628
Fırat Atalay
Due to low production cost, coal is still the most important source of electricity production worldwide. This important position of coal also makes the evaluation of coal resources important. One of the most important attributes to be assessed in this evaluation is estimating the calorific value distribution of deposit. In geostatistical estimation currently Kriging and its variants are being used widely. Alternatively new techniques are being developed and one of them is the Radial Based Functions based method. In this study, Conditioned Radial Basis Function (CRBF) is used to estimate the calorific value distribution of a coal deposit while estimations are also performed with Ordinary Kriging (OK). Results of both estimation methods are compared with respect to composite calorific values. Results show that CRBF produced a higher estimation range than OK with closer mean to composite. However, like OK, results are still smoother than the composite values.
由于生产成本低,煤炭仍然是全球最重要的电力生产来源。煤炭的这一重要地位也使得煤炭资源的评估变得重要。评估中最重要的属性之一是估算矿床的热值分布。在地质统计学估计中,目前克里格及其变体得到了广泛的应用。或者,正在开发新技术,其中之一是基于径向函数的方法。在本研究中,条件径向基函数(CRBF)用于估计煤层的热值分布,同时也使用普通克里格法(OK)进行估计。将两种估算方法的结果与综合热值进行比较。结果表明,CRBF产生了比OK更高的估计范围,平均值更接近复合值。但是,与OK一样,结果仍然比合成值更平滑。
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引用次数: 0
Study on floor instability law of cemented filling mining above a confined aquifer 承压含水层上方胶结充填开采底板失稳规律研究
Q4 Engineering Pub Date : 2023-07-25 DOI: 10.30797/madencilik.1077583
Jiaqi Wang
To solve the problem of floor water inrush in the process of coal mining on a confined aquifer and study the law of floor instability, a cemented filling mining method is proposed in the paper. Using river sand and cement as filling materials, the cementitious material with a concentration of 75% and cement content of 15% has the best flow and mechanical properties. Based on the elastic half-space theory and the bearing characteristics of the backfill, the mechanical model of floor stability is established, the critical criterion of floor instability is proposed, and the relationship between the failure depth of floor and the location and pressure of confined aquifer is obtained. The numerical simulation test scheme is designed, and the FLAC3D fluid-structure coupling element is used to explore the instability characteristics of the floor in the mining process. The research results show that the failure depth of the floor will gradually decrease with the increase of the strength of filling materials, the increase of aquifer distance, and the decrease of water pressure. The research results provide a useful reference for the study of safe mining of coal resources on a confined aquifer.
为解决承压含水层开采过程中底板突水问题,研究底板失稳规律,提出了一种胶结充填采矿方法。以河砂和水泥为填料,水泥含量为15%、浓度为75%的胶凝材料具有最佳的流动性和力学性能。基于弹性半空间理论和回填土的承载特性,建立了底板稳定性的力学模型,提出了底板失稳的临界准则,得到了底板破坏深度与承压含水层位置和压力之间的关系。设计了数值模拟试验方案,并采用FLAC3D流固耦合单元对开采过程中底板的失稳特性进行了研究。研究结果表明,随着填料强度的增加、含水层距离的增加和水压的降低,底板的破坏深度将逐渐减小。研究结果为承压含水层上煤炭资源的安全开采研究提供了有益的参考。
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引用次数: 0
Study on Multi-factor Optimization of Adjacent Underground Layered Salt Rock Gas Storage Based on RSM 基于RSM的相邻地下层状盐岩储气库多因素优化研究
Q4 Engineering Pub Date : 2023-07-24 DOI: 10.30797/madencilik.1206610
Jinyi Ji̇, Baokun Zhou, Zhichen Tao, Xiaoqing Chen
To study the significance of different factors on adjacent underground laminated salt rock storage, 15 groups of simulation tests are designed by using the response surface methodology (RSM), the quadratic response surface model with the midpoint displacement and medial waist stress of the interlayer as the response values is constructed. By analyzing the main effect and interaction of the regression model, the influence of the interaction between pillar width, interlayer thickness, and the location of a single interlayer on the midpoint displacement of the interlayer and the internal waist stress of the adjacent ellipsoidal cavity is studied. The results show that the interlayer thickness is the main effect factor of the midpoint displacement of the interlayer. And the pillar width is the main effect factor of the medial waist stress. When the adjacent storage is designed with as 2.5D pillar width, 2 m interlayer thickness, and the midpoint of the interlayer is located at 0.3H above the cavity, the displacement and stress of the test model are relatively small. The above conclusions can provide a certain reference value for the mechanical analysis of adjacent underground layered salt rock gas storage.
为研究不同因素对相邻地下层状盐岩储层的影响,采用响应面法设计了15组模拟试验,构建了以夹层中点位移和中层腰应力为响应值的二次响应面模型。通过分析回归模型的主要作用和交互作用,研究了矿柱宽度、层间厚度和单个层间位置的交互作用对层间中点位移和相邻椭球腔内腰应力的影响。结果表明:层间厚度是影响层间中点位移的主要因素;矿柱宽度是影响中腰应力的主要因素。当相邻储层柱宽为2.5D,层间厚度为2m,层间中点位于空腔上方0.3H处时,试验模型的位移和应力较小。以上结论可为相邻地下层状盐岩储气库的力学分析提供一定的参考价值。
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引用次数: 0
Analysis of Bottleneck using Mine Production Index and Ishikawa Diagram: A case of Indian Coal Mine 用矿山生产指数和石川图分析瓶颈——以印度煤矿为例
Q4 Engineering Pub Date : 2023-07-18 DOI: 10.30797/madencilik.1160266
Sorokhaıbam Khaba
The traditional way of coal production and management is still predominant in the Indian coal mining industry which has led to a widespread waste of resources both materials and humans. Operational loss of the mining machinery and equipment is one of the key factors for the low performance and productivity of mines. This research presents an application of the integrated approach of the Mine Production Index and Ishikawa Diagram in an Indian coal mine to study the bottleneck equipment in the mining operation among the fleet of the shovel, dumper, and dozer. Mine Production Index (MPI) identifies the bottleneck equipment in the mining operation, and Ishikawa Diagram presents the Root Cause Analysis of bottleneck equipment. The fuzzy Analytic Hierarchy Process (FAHP) is used to determine weights for MPI calculation using information gathered from a group of 11 experts through Structured interviews. The study found that the dozer fleet is the bottleneck equipment and the ineffectiveness of the dozer fleet can be grouped into 4 categories as enumerated on the Ishikawa diagram. The study proposes that the ineffectiveness of the dozer fleet can be improved with an increase in its performance rate. The study is based on the judgments of the experts for the case mine, which may limit the external validity. This paper is an original contribution to the analysis of mining equipment using the Mine Production Index and Ishikawa Diagram in an Indian coal mine.
传统的煤炭生产和管理方式在印度煤矿业中仍然占主导地位,这导致了材料和人力资源的广泛浪费。矿山机械设备的运行损耗是造成矿山性能和生产率低下的关键因素之一。本研究将矿山生产指数和石川图相结合的方法应用于印度一座煤矿,研究电铲、翻斗车和推土机车队在采矿作业中的瓶颈设备。矿山生产指数(MPI)确定了采矿作业中的瓶颈设备,石川图给出了瓶颈设备的根本原因分析。模糊层次分析法(FAHP)用于使用通过结构化访谈从11名专家组收集的信息来确定MPI计算的权重。研究发现,推土机车队是瓶颈设备,如石川图所示,推土机车队的无效性可分为4类。研究表明,推土机的效率可以随着性能的提高而提高。该研究基于专家对案例的判断,这可能会限制外部有效性。本文是对利用印度煤矿的矿山生产指数和石川图分析采矿设备的独创性贡献。
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引用次数: 0
Using glycerin, a by-product of biodiesel, as a grinding aid in the dry grinding of marble dust waste 利用生物柴油的副产品甘油作为大理石粉尘废料干磨的助磨剂
Q4 Engineering Pub Date : 2023-06-07 DOI: 10.30797/madencilik.1196039
Diler KATIRCIOĞLU BAYEL
Glycerin represents the primary by-product of biodiesel generation when vegetable oil is transesterified with ethanol or methanol. Nowadays, the need to turn to alternative materials is increasing due to the competition arising from developing technology and industry and the rapid consumption of Earth’s resources. It is essential to study how to prevent the depletion of natural resources and transform wastes into usable and valuable products. The use of waste glycerin (WG) as a grinding aid can constitute an alternative solution in terms of utilizing the excess glycerin resulting from biodiesel production. This paper investigated the usability of WG as a grinding aid in terms of grinding efficiency while planning to decrease the adverse impacts of waste on the environment via its efficient utilization. The dry grinding experiments conducted within the study’s scope researched the impacts of five biodiesel dosages (0%, 0.25%, 0.5%, 1%, and 2% by weight) on the product. The current research is promising in terms of preventing the depletion of natural resources and transforming waste into usable and valuable products. Furthermore, considerable enhancements were obtained in the grinding performance with the grinding aid utilized.
甘油是植物油与乙醇或甲醇酯交换生成生物柴油的主要副产物。如今,由于技术和工业的发展以及地球资源的迅速消耗所带来的竞争,转向替代材料的需求正在增加。研究如何防止自然资源的枯竭,并将废物转化为可用的和有价值的产品是至关重要的。在利用生物柴油生产产生的过量甘油方面,使用废甘油(WG)作为研磨助剂可以构成另一种解决方案。本文从磨削效率的角度研究了WG作为磨削助剂的可用性,同时计划通过其有效利用来减少废物对环境的不利影响。在研究范围内进行的干磨实验研究了五种生物柴油剂量(重量比为0%、0.25%、0.5%、1%和2%)对产品的影响。目前的研究在防止自然资源枯竭和将废物转化为可用和有价值的产品方面是有希望的。此外,使用助磨剂后,磨削性能得到了显著提高。
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引用次数: 0
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Scientific Mining Journal
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