Mining Engineering Archive

Research on Mode of Structural Control about Groundwater Pour-in Mechanism in Xiadian Gold Deposits of Shandong Province

As the typical vein struntural fissured water pour-in deposits, Xiadian Gold deposits of Zhaoyuan city in Shandong province have the history of exploitation of more than twenty year. The depth of mining increased from -155m in the initial period to -654m of nowadays (ground elevation at +157m), the problem of groundwater pour-in makes great difficult to exploit in depth, the research in groundwater pour-in mechanism has always been a great difficulty in mineral deposit hydrogeology study. With the increasing of mining depth and the extending of yield scale, hydrogeological conditions in deposits have changed a lot, groundwater pour-in brings in many bad influences, such as threatening manufacture safty, decending exploitation efficiency, increasing cost, etc. In the process of draining, source, passageway and affect factors of groundwater pour-in are not clear, and the draining effect is not satisfied, as lack of detailed research on the complication of hydrogeology conditions in the beginning of construction.As far as the formation of deposit hydrogeological types, it is different between groundwater pour-in mechanism of structural formation and the mechanism of other types, the study on deposit hydrogeology is particular, and in the aspects of theory and practice, it makes great sense of researches on the pour-in mechanism of Xiadian gold deposit.According to the discussion of area structural background and minal hydrogeological conditions, as well as the changes of pour-in conditions and deposit outlet characters, this paper analyzed the mode of structural contral about deposit pour-in mechanism basing on the theory of Zhaoping structural dynamic system. Through the analysis of water pour-in fissure structural mechanism, distinguished the controlling factors of Xiadian gold mine water pour-in, also demonstrated the structural mode of deposit pour-in mechanism. Finally, at the control mode of faulted structure, the formation and variety rules of deposit pour-in was discussed.The structural controlling factors of Xidian gold mine water pour-in is determined by Zhaoping faulted structure, and it is consistent with structural dynamic system. Its formation come through four phases of pre-Fenzishan transfigurate age, Fenzishan movement age, Hercynian-yanshanianblock-faulted structural age and Mesozoic Era dynamic-heat field working age, moreover, it has the charactors of multi-orientation, multi-period, shearing character and additiveity. Structural fissures interlude and connect with each other, and formate the fissured water-bearing rock attached to the ores. By inverstigating, the action of faulted structure controlling pour-in mechanism presents on water transimitting of several different oriented structure fissure, such as NE-NNE oriented press-wrest rupture, NW oriented wrest rupture and EW oriented tension rupture.Structural dynamic system of Zhaoping rupture makes the primary controlling affect on the groundwater pour-in, and the affects become weaken with the increasing of mining depth, such as precipitation and surface water etc. The controlling affect of rupture structural fissured water on the pour-in water is prominence.According to the investingation and researchs source, passageway and affect factors of groundwater pour-in, this paper explain that the vein structural fissured water is the direct source of groundwater pour-in in Xiadian gold deposits. As the depositing layer determine the mining layer of gold deposits, the vein structural fissured water became uncoverd with the increasing of depositing depth, and turned into the direct source of groundwater pour-in, it is confirmed the mode of structural control about groundwater pour-in mechanism in Xiadian gold deposits. Characteristics of groundwater pour-in are consistent with the source, passageway of water pour-in, affluenced by the rupture zone structural control. The positions are ununiform, flowing yield change feebly, it is incarnated the mode of structural control under the structural dynamic system of Zhaoping rupture. The changing characteristics of flowing yield are the embodiment of Zhaoping structural fissured system in the groundwater pour-in condition.Compared with surface water and superficial groundwater, the hydrochemical characteristic of water pour-in has typical”close”character, it shows that the hydraulic connectivity is badly related in plane orient, but is obvious related in vertical orient. There are some rules about the concentration change of hydrochemical factors with the increasing of depth. So the the hydrochemical characteristic of water pour-in reflect the pour-in mechanism under the mode of structural controlling.Above all, the situation of pour-in fissure zone distributing and development formatted from structural rupture control the groundwater pour-in condition. Mode of structural control about groundwater pour-in mechanism in Xiadian gold deposits is mainly incarnate in the source, passageway and character of waterflow yield. By the study on the mode of structural control about groundwater pour-in mechanism, it is ture that this mode of structural control could manifest the cause of formation about the groundwater pour-in mechanism in this gold deposits and hydrogeological characteristic actually, and explain the changing character of waterflow yield. This paper provided the scientific accordings for the mining of Xiadian gold deposits and the study on mining hydrogeology under similar conditions.

Sensitivity Analysis on Controlling Factors of Water Inrush

Mine water disaster is one of the biggest obstacles affecting and restricting China’s coal production. Only the floor karstic water threats about 42 percent China’s coal base. Therefore, the research on water invasion regularity of coal floor has an important practical and theoretical significance for the coal mine safety production.In this paper, FLAC3D finite difference software is used to simulate the depth of destroyed floor in different working face length, mining depth, exploiting thickness, water pressure and floor lithology. Then, simulation results are calculated by variance analysis method. On the basis of that the sensitivity of main controlling factors is determined. Firstly, according to the actual production experience and results of previous studies, main influence factors of floor water invasion and action principles of these factors are discussed. Then, combining geological conditions of this study, the controlling factors are determined. On the basis of “down three zone” theory, using rock fracture mechanics theory, the formation mechanism and calculation formula of the down three zone are analysis, and dynamic mechanism of floor water invasion is revealed. All of that provides a theoretical basis for sensitivity analysis of floor controlling factors. Then, according to the actual conditions, simulation geological condition is set. Meanwhile, combination experimental conditions, level values of controlling factors are determined. In order to reduce workload, author identified test plan using orthogonal test, and did the numerical simulation by FLAC3D. Through the work of before, the depth of destroyed floor under different controlling factors are determined. Eventually, using orthogonal analysis, charts and linear regression method, further discussed floor water invasion regularity and the sensitivity of main controlling factors. It’s useful for preventing water invasion. And it provides a theoretical guidance for coal mine safety production.Water-inrush is the result of many factors working together. So water-inrush mechanism is very complicated. This paper presents a simple water-inrush law under the ideal geological conditions. In the actual production, coal mines should be based on the specific circumstances of water-inrush simulation to determine water control measures.

Xi Ye Shan-tailing Dam Seepage Transfusion Simulates Analysis

Mine tailings dam is an important production facilities, a large number of dams memory tailing sand and water, once the dam break, the tailing dam and water on the debris flow will be in the form of emission, the consequences would be disastrous. Their predecessors do a lot of theoretical research and engineering example statistics show that the impact of the tailings dam safety and stability of various factors, the location of the dam seepage infiltration is extremely important factor. The need for more stability in the evaluation of the tailings dam dam seepage field study to determine the location of infiltration and analysis of its impact, and propose alternatives.This article study on the rule of tailings dam changes of the seepage. Xi Ye Shan-tailing dam in several decades of operation has shown a lot of failures, and considering raising its 100 m to the situation, it is need to study the stability of its seepage. Following are the mainly completion of work:(1) Through on-site inspection, testing analysis, master-Ye Shan tailings dam dam operation in the history and present situation and geotechnical engineering;(2) For the tailings dam material characteristics, the introduction of seepage theory, the seepage field two-dimensional finite element model, simulate, the dam of the changes of seepage;(3) Calculation of the rule-of-tailings dam specific types of damage and stability of the dam evaluation analysis and treatment measures;(4) Xi Ye Shan-tailing raise the tailings dam 100 m to conduct a feasibility analysis, methods of expansion dam design and analysis of the dam heightening the flow stability;(5) For this study the contents and methods, put the text of inadequate light industry and the development of future work in areas for improvement.

Intelligent Environmental Monitoring and Information Processing System

Implementation of intelligent mining environmental monitoring and information processing is a new issue to be resolved. In mining production safety is a big problems urgently which is needed to be solved.In coal mining areas, a number of security a number of security incidents often occur. The coal production safety of the environment factors not only affects the improvement of production efficiency, but also has a direct ralationship with the physical and mental health of the operators. So detection and control of the environment is particularly important and imperative to improve quality of the environment.The part of the intelligent environmental monitoring and control mainly researches the ambient temperature and pressure on the hydraulic support parameters, these on-site data storing and displaying through the MCU system. Using infrared wireless data transmission sents to PC, to analysis the data processing. Fuzzy control of the intelligent information processing method is be used to assess the environment of the coal mine, which can effectively predict and prevent accidents and reduce unnecessary losses and avoid disaster occurred.In the algorithm, this paper is based on fuzzy control of information processing methods. It is on the basis of the basic principles, functions and algorithms to expatiate the fuzzy control, and discuss the researching method of the information processing on the fuzzy control. In order to forecast early warning fast and excatly, it is used the experiment temperature and pressure data and gas concentration for the fuzzy contorl and operation, which accords with the evaluating requirement of the complex environmental in the coal mine, and provide scientific and intelligence basis for the upper decision-making.

Roasting-Magnetic Separation and Direct Reduction of a Refractory Oolitic-Hematite Ore

In this paper,roasting-magnetic separation and direct reduction methods were used to treat an oolitic-hematite ore in the laboratory conditions to produce magnetite concentrate and sponge iron respectively.And this research will be of significance in the rational and effective utilization of the refractory oolitic-hematite ore.The influences of reduction time,temperature and reductant amount were investigated and designed fractional factorial experiment L9(34),the result showed that the descending order of the influences to the roasting-magnetic separation was temperature,time and reductant amount.The single factor experiments showed the optimum experimental conditions depend on the following things.The temperature of roasting is at 850℃for 45 minutes, mixture ratio of ore and reducing agent is 50:2.5,and the grinding size is 93% -200 mesh before magnetite separation.Under these conditions,a magnetite concentrate grading 61%Fe with recovery 96%can be obtained.The Fe-O equilibrium chart and XRD analysis showed that some of magnetite oxidized toγ-Fe2O3 under the cooling process. Using the oolitic-hematite ore to produce the sponge iron,the optimum experimental conditions rely to many things.The reduction temperature is at 1050℃for 5.0 hours,the concentric ring should be used,the anthracite should be used as reducing agent,and CaCO3 as aerification accelerant and desulfurizer, then the mixture ratio of ore,reducing agent and additive is 50:60:8,and the grinding size is 70%-400 mesh.Under the optimum experimental conditions, sponge iron containing 89%Fe with metallization 90%and recovery 85%can be produced.The experiments were characterized by thermodynamic analysis, elemental analysis and energy spectrum analysis,the results show that reduction process is Fe2O3→Fe3O4→FeO→Fe.

Application and Study on the Extension Comprehensive Evaluation Method of the Mine Ventilation System

As one of important production system, Mine ventilation system plays an extremely important role on maintaining mine safety production. Reasonable evaluating ventilation system to mine ventilation daily technical management, ventilation system optimization transform, safely production of the mine has a great important meaning. And it is an effective method to guarantee mine ventilation system qualified.The ventilation system is one that is influenced by many kinds of factors and is random, dynamic, complicated. Rounded the basic content that the mine ventilation system is safe, reliable and economy is rational on the premise of feasible technology and based on the definition of the mine ventilation system, an overall and scientific ventilation index system was put forward, Which includes 11 pieces of indices mainly covering the three aspects of technical feasibility, economical rationality and safety reliability on mine ventilation system. In this paper, a model of multi-level extension synthetic evaluation was established by applying extenics theory and methods. In this model, the comprehensive correlative degree was taken as the evaluation criteria so as to avoid the subjectivity caused by human during evaluation. Then, this model was applied to evaluate the ventilation system of Liangjia mine of Longkou Mining Group Company and Sanhekou shengjian colliery of Shandong province, the comprehensive status of this ventilation system was obtained, the existing problems and the corresponding countermeasures were put forward. The evaluation result indicates that this method is more objective than other evaluation methods mentioned in this article and the result is more in accord with the production reality than other methods.

Design of the Hydraulic Power Support Control System Based on CAN Bus

Hydraulic support electro-hydraulic control system is the key mining technological equipment for fully mechanized coal face to achieve high yield and high efficiency in automation, This paper takes the ZY9400/28/62 type shielding hydraulic support as the controlled member, complete the design of the hydraulic control system, the paper has mainly carried on the following research work.First, the overall control system of the hydraulic support is designed. From the overall structure of control systems, network communications and support controller in three areas, carries on the analysis to internationally three big mainstream hydraulic support control system control plan, this paper adopts the whole control scheme based on CAN bus, and gives a brief introduction to the composition of its control system.Second, the establishment of the hydraulic support control system hardware system. On the basis of detailed analysis of control systems in a coal mine safety requirements, the system’s real-time and network communications bus, determine the structure of hardware, and select the external control system hardware, Finally, design the human-computer interface.Third, hydraulic support control system software design. Based on the need to control the functions: single functions, sequence functions, the group automatically functions, emergency shutdown and lock functions, fault diagnosis, design the PLC software program: The hydraulic support controller CAN communication adopts the way of principal and subordinate, the substation is responsible for the control of hydraulic support, data acquisition and control orders issued and received, main station is responsible for inquiring station one by one, to collect all the data collected from the substationFourth, the hydraulic support PC monitoring control system software design. Via configuration software, the real-time remote monitoring of the underground hydraulic support is to be realized.Finally, according to hydraulic support control system functions request, carries on to hydraulic support control system each function to a test and unites an experiment, and has formulated the working instruction.

Design of the Hydraulic Power Support Control System Based on CAN Bus

Hydraulic support electro-hydraulic control system is the key mining technological equipment for fully mechanized coal face to achieve high yield and high efficiency in automation, This paper takes the ZY9400/28/62 type shielding hydraulic support as the controlled member, complete the design of the hydraulic control system, the paper has mainly carried on the following research work.First, the overall control system of the hydraulic support is designed. From the overall structure of control systems, network communications and support controller in three areas, carries on the analysis to internationally three big mainstream hydraulic support control system control plan, this paper adopts the whole control scheme based on CAN bus, and gives a brief introduction to the composition of its control system.Second, the establishment of the hydraulic support control system hardware system. On the basis of detailed analysis of control systems in a coal mine safety requirements, the system’s real-time and network communications bus, determine the structure of hardware, and select the external control system hardware, Finally, design the human-computer interface.Third, hydraulic support control system software design. Based on the need to control the functions: single functions, sequence functions, the group automatically functions, emergency shutdown and lock functions, fault diagnosis, design the PLC software program: The hydraulic support controller CAN communication adopts the way of principal and subordinate, the substation is responsible for the control of hydraulic support, data acquisition and control orders issued and received, main station is responsible for inquiring station one by one, to collect all the data collected from the substationFourth, the hydraulic support PC monitoring control system software design. Via configuration software, the real-time remote monitoring of the underground hydraulic support is to be realized.Finally, according to hydraulic support control system functions request, carries on to hydraulic support control system each function to a test and unites an experiment, and has formulated the working instruction.

Based on GIS Hypothesized Open-air Mining System Research

The mineral resource is relates national economy and the people’s livelihood the precious natural resource, is the human production and the development base resources, mining industry is take the natural resource as the production object ancient industry. At present, the overwhelming majority mine enterprise also occupies the work crowded stage, the informationization degree is very low, how will the modernized information technology management apply in mining industry, realizes the mine mining informationization, is the present is urgently needed the solution the question. The mine mining system contains has the massive spatial information, but the geographic information system is the management and the analysis spatial data computer system, may carries on each kind of processing to the spatial data according to the geographic coordinate or the space position, and can by forms and so on graph, data, writing express the processing result. Therefore applies GIS in containing has the massive spatial information mine mining system to have to the mining industry informationization construction the extremely significant significance.The hypothesized strip mining system carried on the effective indication through GIS to the mine, the user has been able to carry on the effective management on the computer to the open-air stope, could be clear at a glance the demonstration with the mine mining related data message and the mine inherent attribute data in front of the user, enormous enhancement administrative personnels’ working efficiency. In the article acts according to the open-air technique of production, has carried on the design to the hypothesized strip mining system’s overall function structure; Environment last part became the GIS function in Visual the C#.Net to control MapX to develop the loading transport monitor system and to match the ore management system management system, and obtained the application in three village strip mines.This article mainly has conducted the deep research from the following several aspects to the system:(1) System function system design. The hypothesized strip mining system is to the mineral resource development, the plan and the management software system, in the article according to the ore deposit model, the geologic survey, the perforation demolition, picks installs the transportation, the platoon earth management as well as the production scheduling and matches the ore and so on open-air technique of production, has carried on the system design to its function.(2) Loading transport monitor system. The system to saves the vehicles message data carries on the analysis in the database, according to the latitude and longitude value which obtains on the map demonstrated that vehicles’ concrete position, carries on the real-time monitoring and the dispatch to the vehicles; Management vehicles movement historical path and vehicles’ status messages.(3) Matches the ore management system. System the personal status data which piles to artillery hole and Baodui has carried on the effective management, uses the raw ore to match the ore, according to each mining personal status situation, the transportation is away from, matches the ore request and so on, according to distributed accordingly the ore linear programming model to give has matched the ore result.(4) Hypothesized strip mining system’s in three village strip mines application. Introduced the loading transport monitor system in three village strip mine software and hardware deployment and the major function; Managed and aspects and so on personal status data management from artillery hole Baodui introduced matched the ore management system management system’s application, and has carried on the analysis to the application result.

Study on the Drivin of Cavity-front Constant-pressure Impact-rotary Hydraulic Roofbolter

Hydraulic roofbolter is the key equipment for Ground Anchorage, and have an important impact on project quality, for ground anchorage engineering.Base on analysizing of revolving apparatus hydraulic roofbolter, that the impact of drilling speed, then a design method has been carry out, that it adopted the driving head of cavity-front constant-pressure impact-rotary hydraulic roofbolter. Accordingly, designed the structural of the driving head and revolving apparatus; Established the 3D digital model of revolving apparatus and impact institutions, and carry on virtual assemble by Pro / ENGINEER software,. Then the model is imported into ADAMS (Automatic Dynamic Analysis of Mechanical System)software and the machine-hydraulic coupling simulation of hydraulic control system was done. The results showed that optimized the driving head of impact-rotary with small size, impact of the stability and operation stability.The paper, optimizing the use of modern design, 3D CAD software, simulation software, optimized design for the driving head of cavity-front constant-pressure impact-rotary hydraulic roofbolter. and provided an important reference. The ideas and methods of this paper have a certain significance and value for the development of similar products.