Abstract:Based on years of monitoring data from dewatering wells water level in Chaoyang Open-pit Mine,this article systematically analyzes the dynamic variations law in dewatering wells water levels and the influencing factors,reveals the correlations between dewatering well water levels and factors including pit distance,stratigraphic structures and hydrogeological conditions,demonstrates the feasibility of postponing the third-phase dewatering well construction.Through stormwater runoff calculations and water treatment capacity assessments,we conduct a balance analysis between water supply and storage,propose the optimized scheme for comprehensive utilization of pit water,design water resource utilization system based on storage-drainage equilibrium,which provides a scientific basis for the efficient utilization of water resources and safe production in the open-pit mine.

Abstract:In order to further enhance the availability of 220 ton mining electric drive dump truck and improve the efficiency of its supporting 5GEB25 electric wheel's independent repair,and ensure the quality of major repair,a comprehensive analysis is conducted based on the technical challenges encountered during recent independent maintenance and the deficiencies of existing maintenance methods.Through continuous exploration of new maintenance standards,guided by the principles of optimizing independent maintenance processes and extending the service life of components,an independent research is conducted to develop a disassembly process for 5GEB25 electric wheel's hub bearing.This process has reduced the damage rate of the hub and ensured the quality of the independent major repair.The results show that this disassembly process can reduce the time required to disassemble a single hub decreasing from 40 min to 10 min,decrease the number of maintenance technicians from 3 to 1,and lower the hub damage rate caused by disassembly process from 60%to 10%.Through optimizing disassembly process,the disassembly of a single hub can save cost of 180,000 yuan,further improving the disassembly efficiency.

Abstract:In order to address the backlog of task orders caused by the increasing number of laboratory analytical instruments and testing samples,the experimental center has established Laboratory Information Management System(LIMS)based on Browser/Server(B/S)architecture.In the application process,the standalone LIMS system has limitations and shortcomings,such as information silos,limited functionality and security concerns.This article presents LIMS system based on IoT to build an interconnected and intelligent laboratory information management system for coal mine safety.The results show that based on IoT technology,LIMS can effectively integrate multi-source sensing information encompassing"personnel,equipment,materials,methods,environment,evaluation and testing",which realizes sample scanning and data collection in and out,and provides information support for precise state perception,remote management,and automated detection in coal mine safety experiments.

Abstract:Fushun East Open-pit Mine is a typical soft rock slope open-pit coal mine with complex geological conditions.The slope rock mass is subject to long-term mining disturbance,weatheringand the influence of groundwater,which increases the risk of slope landslides.In order to reduce the harm caused by slope landslides,based on the improved tangent angle theory,the article draws on surface deformation monitoring data from the deformed area of the south slope of Fushun East Open-pit Mine.By analyzing the change law of displacement time curve,the article proposes a quantitative division standard to divide the accelerated deformation stage into three sub stages:initial accelerated deformation stage,medium accelerated deformation stage,and accelerated deformation stage,and the landslide early warning criteria for the corresponding T-t curve tangent angle α=65 °(initial accelerated deformation stage),for α=75°(moderate acceleration deformation stage)and α=82°(accelerated deformation stage.The results show that the deformation velocity calculated based on the tangent value multiple of the tangent angle can be used as the radar monitoring warning threshold for the slope of Fushun East Open-pit Mine,which can provide reference for the study of other types of landslide warning criteria.

Abstract:In order to solve the problem of high dust concentration in transport corridor of coal preparation plant,the article takes the transport corridor of Xinjiang Qitai coal preparation plant as the research object,and based on the gas-solid two-phase flow theory and DPM model,uses the Fluent software to conduct a numerical simulation study on the dust distribution law of the transport corridor,and designs a set of automatic spray dust removal device.The results show that the distribution of air flow field near the conveyor belt surface can be changed by controlling the running speed of the belt.The conveyor best transport speed of the belt is 2 m/s.The dust removal cover installed at the tail of the transport corridor can effectively reduce the dust pollution in the gallery.The optimal exhaust air volume of the fan of the dust removal system is 9 500 m3/h.The dust concentration sensor and spray nozzle added on site can effectively realize the function of dust concentration monitoring and automatic spray dust removal,which provides an effective way for the transport corridor dust prevention and control of coal preparation plant.

Abstract:In order to solve the practical problems existing in the current railway crossings of Fushun East Open-pit Mine,such as insufficient approach alarm distance,poor visibility for locomotive drivers,multiple manual intervention links and low crossing efficiency,the mine plans to introduce an intelligent unmanned railway crossing protection system in the form of traffic management to upgrade the existing crossings.This article analyzes the feasibility of applying the unmanned crossing protection system in East Open-pit Mine from aspects of safety and technical performance,economic benefits and production efficiency improvement.The results show that the unmanned crossing protection system has significant advantages in improving crossing efficiency,reducing the risk of human accidents,and optimizing operation and maintenance costs.The integrated application of the multi-sensor fusion collaborative perception system and the traffic management logic interlocking control can effectively meet the safety management requirements of the crossings in the complex environment.While achieving a safe and efficient modern centralized control management mode for the existing crossings,it liberates employees from harsh working conditions and high-intensity physical labor,promoting the intelligent mine management concept of"fewer people mean safer,and no people mean even safer"to the greatest extent.

Abstract:The open-pit mine of cold and arid grassland area often faces many difficulties in carrying out geological environment protection and land reclamation,such as complex geological environment and harsh natural environment.In order to solve the problem that the open-pit mine in this kind of area is lack of ideal restoration scheme,this article takes Shengli West No.2 Mine as an example,analyzes geological environment,land damage status and bottleneck problems of the mine,and puts forward the optimization scheme.By applying organic manure,water retaining agents,and microbial agents to restore soil function,selecting herbs and shrubs with strong stress resistance for land reclamation,configuring plants with different life forms to form complementary advantages of plant species,the reclamation effect can be improved.After using the optimized measures,the open-pit mines achieve better geological environment protection and land reclamation effects in cold and arid grassland areas.

Abstract:In order to reduce the safety risk caused by the unsafe behavior of blasting alert in open-pit coal mine,based on the safety inspection data,the article counts unsafe behavior in blasting alert work,studies the causes and risks of unsafe behavior in blasting alert work,and presents the method of controlling unsafe behavior in blasting alert.The results show that the unsafe behaviors of blasting alert can be divided into 4 categories and 32 behaviors.The main reasons for the unsafe behavior of alert are unreasonable blasting design,non-standard on-site management,inadequate management of relevant parties,and insufficient preparation of vigilance tools.Among them,the unsafe behaviors caused by non-standard on-site management account for the largest proportion,56%.Based on the causes of unsafe behaviors in blasting alert,the article proposes systematically control powder charge and the unsafe behaviors in initiation detonation alert from six aspects,including standardizing the blasting design,promoting the standardization of blasting alert,strengthening the management of blasting operation sites,strengthening the management of relevant parties,optimizing the preparation of alert tools,and strictly supervising and inspecting blasting alert.

Abstract:In order to effectively control the deformed area of the internal dump in Shengli East No.2 Open-pit Coal Mine,based on the actual conditions of the on-site engineering,the article presents a comprehensive slope control idea of"compression first and then replacement and filling",designs two local replacement and filling schemes and delineats the mining boundary according to specific parameters,comprehensively compares multiple factors to determine the optimal control scheme.The results show that the proposed control scheme one can effectively maintain the stability of the deformed area in the internal dump,maximize the recovery of coal resources,avoid economic losses caused by landslides,and ensure the normal continuation of production,transportation and other operations in open-pit coal mines.

Abstract:To investigate the slope stability of steep slope mining in the east slope of Anjialing Open-pit Mine,the article adopts FLAC3D to conduct numerical simulations of typical cross-sections,and analyzes displacement,stress,and strain to determine the failure mode.The article uses limit equilibrium method(M-P method)to calculate the stability of two representative cross-sections below the 1045 level under a steep mining scheme with 5 m stepwise reductions in bench width.The results show that the failure mode of the east slope follows an approximately"circular arc"pattern within the rock mass.When the entire area below the 1045 m level advances 35 m eastward,the stability factors for the two typical cross-sections reach 1.051 and 1.05,meeting the required safety reserve coefficient of 1.05.This steep slope mining scheme achieves additional coal recovery of 1,100 tons per meter length with a stripping ratio of approximately 0.97 m3/t,maximizing economic benefits while ensuring safety margins.

Abstract:To analysis on effect of differemt discarded materials on slope stability at the bottom of open-pit coal mine.This article focuses on the stability problem of the dump slope in open-pit coal mines,taking Hequ Open-pit Mine as an engineering example,and systematically studies the mechanical behavior and stability characteristics of the slope under different bottom material conditions.The article uses automatic triaxial compression test to obtain the shear strength parameters of loess,fine sandstone,coarse sandstone and mudstone under different confining pressures,and constructs a dump slope model to analyze the stress-strain distribution and the location of potential sliding surfaces under different bottom material layer strengths and thicknesses.At the same time,we use multiple limit equilibrium methods to calculate the stability coefficients under various working conditions.The results show that regardless of whether fine sandstone,mudstone or coarse sandstone is used as the bottom discard layer,the slope presents a typical overall bottom-cutting circular arc sliding failure mode.However,the mechanical properties and thickness changes of the bottom material have significant differences in their influence on the stability coefficient.As the thickness of the bottom fine sandstone layer increases,the safety factor increases from 1.268 to above 1.324,showing a significant gain effect;while the safety factors of the bottom mudstone and coarse sandstone layers decrease slightly to significantly with the increase in thickness,and the coarse sandstone layer even drops below the safety threshold of 1.2 when the thickness reaches 72 m.

Abstract:In order to optimize energy management and enhance transportation efficiency of autonomous mining trucks,this article establishes a fuel consumption prediction model based on key variables including payload,total resistance,and actual speed,analyzez the performance of three machine learning models,multiple linear regression,artificial neural network and support vector machine for fuel consumption prediction.This article holds significant practical value for rationally planning driving strategies of autonomous systems,improving energy utilization efficiency,and serving as a reference for evaluating the performance of autonomous mining trucks.Based on real-world application scenarios,the article investigates the modeling and evaluation of diesel consumption for mining trucks.We utilize a dataset of 300,000 operational records from an open-pit coal mine in Inner Mongolia,the models are evaluated using metrics such as the coefficient of determination(R2),mean squared error(MSE).The ANN model achieves the highest prediction accuracy(R2=0.9051,MSE=486.32),which provide a reliable basis for energy-efficient route planning and task scheduling of autonomous mining trucks.

Abstract:In order to ensure the implementation of the safety management work of the contractor in the process of subcontracting stripping production in open-pit mines,to improve the safety management capability of the contractor and promote the improvement of the overall safety production management level of open-pit coal mines,the article studies and discusses the current safety management capability level of the contractor,and constructs the evaluation model and control measures,and establishes the evaluation model with the help of AHP(Analytic Hierarchy Process)fuzzy comprehensive evaluation method.The results show that through the scientific and reasonable safety management measures such as strengthening the safety education of the contractor,improving the safety awareness of employees and improving the safety management mechanism of the mine,the self-protection ability of the contractor's employees can be significantly improved,and then the overall safety production management level of open-pit coal mine can be improved.

Abstract:In order to solve the problem of debris generated by the friction plate of the electromagnetic fan clutch of mining trucks entering the engine and causing damage,taking 930E-4mining truck as an example,this article introduces the structure,working principle and operation process of the electrically controlled silicone oil fan clutch,and analyzes the actual situation and benefits of the clutch applied to 930E-4mining truck.The application of electrically controlled silicone oil fan clutch greatly extends the engine life,reduces the frequency of clutch failure,and improves the utilization rate of mining trucks.

Abstract:In order to enhance the efficiency of drilling operations and reduce safety risks in open-pit coal mines,this article discusses the application framework of intelligent drilling rigs in South Open-pit Coal Mine based on the intelligent control systems and multi-sensor fusion technology.By integrating high-precision navigation positioning,automatic hole position management system and real-time fault diagnosis system,the article constructs an intelligent drilling operation system.The intelligent drilling rig efficiency achieves 100％of the efficiency of traditional equipment,with a drilling accuracy error within±5 cm,effectively addressing issues of low precision and high labor intensity in manual operations.The intelligent drilling rig technology can significantly improve the quality and safety of open-pit coal mine drilling,which provides technical path and practical experience for intelligent mine construction.

Abstract:The Dabaoshan Mine open-pit slope has historically experienced multiple small-scale landslide incidents.To mitigate slope accidents,this article focuses on the western slope of Dabaoshan Mine as the engineering context,uses Dips software to analyze and group fractures in nine failure-prone areas,identifying dominant structural planes that influence slope stability.By examining the relationship between the orientation of dominant structural planes and the slope surface in stereographic projection diagrams,the failure probability of step slopes in each area is assessed.The results indicate that west slope investigation area in Dabaoshan Mine occurs three potential landslide modes:planar failure is likely in Areas 1,3,and 6;wedge failure in Areas 2,7,and 8;and toppling failure in Areas 4,5,and 9,with failure types showing a significant positive correlation with fracture development characteristics.The probability of planar failure is relatively high in Areas 1,3,and 6(0.33～0.5),while wedge failure probability is lower in Areas 2,7,and 8(0.16～0.33).Areas 4,5,and 9 exhibit notable toppling failure risks(0.33～0.5).

Abstract:The article proposes a systematic comprehensive evaluation index system based on evaluation of various disasters and the hazards that may be caused by the closure of open-pit mines.This system covers multiple aspects such as geological environment,hydrological conditions,soil quality,vegetation coverage and air quality.Based on the indicator system,we develop a new multi-level fuzzy comprehensive evaluation model.This model uses CRITIC weighting method to automatically quantify the importance of each indicator by calculating the relative conflict degree and contrast strength between each indicator.The results show that this model can accurately identify and evaluate the main disaster risks after the closure pit,confirming the effectiveness of the multi-level fuzzy comprehensive evaluation model in disaster assessment.The detailed disaster response strategies provide effective operational guidance for the management work after the closure pit,ensuring a smooth transition of closure activities and sustainable socio-economic development.

Abstract:In order to accelerate the process of intelligent construction of open-pit mines and solve the shortcomings of the current intelligent scene ecological construction,the article systematically analyzes the construction method of intelligent scene ecosystem.Taking the intelligent mine construction practice of Hongshaquan Open-pit Coal Mine as an example,the article proposes the ecological picture of intelligent scene of open-pit mines,which can solve the important needs and short boards of intelligent construction of coal mines.Through systematic integration of new generation information technology,we effectively solve the problems of stacking,isolation and mutual exclusion as well as the serious impact of synergistic effectiveness of the current intelligent system of open-pit mines,and realize improving production efficiency by 30％and reducing safety accidents by 50％.

Abstract:Based on the current situation that a large amount of coal resources are overburdened by the extremely thick coal seam end slope in Tianchi Energy South Open-pit Mine,it is necessary to conduct side slope mining on the end slopes.The article adopts Morgenstern-Price method analysis,and adjusts the equilibrium relationship and the expression of the safety factor in combination with the seismic inertial force.Through numerical simulation analysis with Geo-Slope and Geo-Quake/W,the article designs three side slope mining schemes,discusses the slope stability under the side slope mining schemes and under seismic loads after side slope mining,and discusses the economic benefits of different schemes.The results show that the south end slope is stable in the current situation,indicating the possibility of side slope mining.The slope stability meets the requirements of the design specifications under both"self-weight"and"self-weight+earthquake"working conditions.The coal recovery amount of scheme 3 is 15 350 tons per year,generating the greatest economic benefits.Therefore,scheme 3 is recommended,in which the 355 m platform is merged and the width of the platforms below 370 m is set to 10 m.

Abstract:In response to the transition problem from gently inclined coal seams to inclined coal seams in open-pit mining areas,taking Manglai Open-pit Coal Mine as the engineering background,based on the analysis of changes in coal seam dip angle,according to changes in coal seam occurrence,current production status of open-pit mines and on-site demand,three sets of two feasible transitional mining plans are set up for each mining area.Dynamic deduction is conducted for each turning plan,and a hierarchical optimization method is applied.Through comprehensive comparison and analysis of technical and economic key indicators,the optimal mining area transition scheme is determined.It is concluded that the optimal transition mode for this mining area transition scheme is the fan-shaped transition mode.The above optimization scheme ensures the smooth temporal and spatial connection of open-pit mining production,improves the utilization rate of internal dump,reduces the land acquisition for external dump,which creates more economic benefits for mining enterprises.