The primary task of the mineventilation is delivering fresh air to the mine continuously, diluting and discharging noxious gas and dust, adjusts microclimate in coal mine, establishes good work environment, but the most important task of mineventilation is airflow control while mine fire is happened. The mineventilation system is a complex network of the high interdependence, in order to satisfy the need of the safety in production, we must distribute air according to need in the pit. How to determine one kind plan of air control, it not only can satisfy the ventilation demand and the working condition
Underground mines are becoming deeper due to the depletion of shallower mineral mineventilation network can save tremendous of electricity cost used by fans. This requires the ventilation system to be regulated so that the required airflow to the mine key areas are met with minimum power consumption. But mine internal coupled strongly. The air-flow of all the other branches flow is regulated. Such a problem becomes more complicated if multiple main fans are installed. The Hardy Cross method can in pipe network systems where the inputs and outputs are known with the optimum regulating scheme with iterative method such as Hardy Cross, because the inputs of the network systems are the regulating This paper established a mineventilation PSO optimization algorithm to solve the model. By applying it to a typical mineventilation network case, it is demonstrated that the proposed algorithm can reach the global optimal solution in shorter computational time. It is recommended to incorporate the algorithm to commercial ventilation network analysis software to assist with cost effective ventilation planning.
Fernandez-Garcia, J, Marin, P, Diez, FV et al. (1 more author) (2016) Combustion of coal mineventilation air methane in a regenerative combustor with integrated adsorption: Reactor design and optimization. Applied Thermal Engineering, 102. pp. 167-175. ISSN 1359-4311
New possibilities for calculation tools enabling mineventilation services to determine safety indices for the operation of a ventilation system based on a system of VentGraph computer programs have been presented , , , . The system of VentGraph programs is used in a number of Polish coal mines, as well as in Australian, North American, Vietnamese and Czech coal mines , . At the same time a systematic use of 2D and 3D dimensional flow modelling , ,  resulting from new development of the Computational Fluid Dynamics provides insight, which is more detailed but limited to one or a few workings. So far modelling large ventilation systems is practically possible only with one dimensional flow approximation, used by programs like Ventgraph, which justifies their further development. The results thus obtained open new possibilities for study and analysis, particularly of phenomena caused by the methane inflow to areas of mining longwalls and goaf.
The measurements in the close vicinity of Theodor Shaft apparently missed the plume, which is very narrow so close to the source. To avoid potential interference on the inver- sion of the near part of the plume, data from the first 300 m downwind have been excluded prior to the inversion. Sim- ilarly, data have been restricted to ±1000 m in across wind direction to avoid the impact of other sources than the one under consideration. Finally, data further than 1800 m away from the ventilation shaft where the plume appears partic- ularly rugged have been omitted. The selected rotated and gridded data are shown in Fig. 10a including the contour lines resulting from inferred emission rate and stability parameter. The far part of the plume is subject to a different effective wind speed and direction. Hence, the plume (and integral) inversions of the near and far part have been conducted sep- arately (Fig. 10b). The across wind limits have been set to ± 1800 m accounting for a wider dispersion further from the source.
The main design solutions developed for the gas treating equipment are based on the use of the Ranque effect for intensive energy vortex swirling of gas streams, including ventilation and degasification methane emissions from coal mines, with subsequent maximum possible recovery of coal dust and highly concentrated methane to be used as fuel for internal combustion engines and for co- generation plants. Scientists and coal experts pay particular attention to solving the problem of coal mine methane which is due to the need to ensure methane safety in underground coal mining and passing the “gas barrier” in order to improve production efficiency. With the development of underground coal mining and increase in the depth of mining, the problem of coal mine methane enhanced, which includes the tasks for ensuring methane (gas) safety in coal recovery; degasification, capturing and recovery of coal mine methane; industrial (commercial) recovery of coal mine methane; reduced emissions of coal mine methane to the atmosphere. In 1994 the Research Institute of Comprehensive Exploitation of Mineral Resources of RAS submitted a proposal on the need for state support of researches performed in the country on methane recovery from high gas-bearing coal beds to the Research Council for the State Scientific and Technical Program (SSTP), coordinated by the Ministry of Higher Education, Science and Technology of the Russian Federation. In 1995-96, the decision to hold a tender on this problem was taken and two scientific and technical projects, included in the Nedra Rossii SSTP, were established:
Ventilation air methane is a major contributor to the carbon footprint of the coal mining industry. This contribution can be mitigated by combustion of methane to carbon dioxide. The use of efficient combustion devices, such as catalytic reverse flow reactors, can improve the economy of the process. However, the high water content of the ventilation air can inhibit catalysts (such as palladium) used in this process. The overcome this issue a novel reverse flow reactor with integrated separation, capable of adsorbing water from the feed before reaching the catalyst, is studied. The adsorbent is regenerated in situ thanks to the characteristic thermal pattern of reverse flow reactors. The application of this reactor design to the combustion of ventilation air methane has been demonstrated in a bench-scale device, operated at 0.15 m/s (n.t.p.) superficial velocity and different methane concentrations (1800- 5400 ppm) and switching times (100-600 s). A mathematical model for this reactor has been proposed, the water adsorption parameters have been determined experimentally, and the model has been validated by comparison to bench-scale experimental results.
273 The technical details of mechanical and electrical drive system -1 and drive system -2 are same. The corresponding experimental data are presented in table IV and V, for down the gradient and up the gradient of mine haulers. The experimental analysis is shown by various consumption curves are calculated and curves are plotted are shown in figure: 3, figure 4, figure 5, figure 6 respectively. The drive system is located above 8 th Level and serving to 42 nd Level, which is about 4.2km away from the drive system. The total energy consumption chart of both drive system are as shown in figure 7. The energy calculation steps are given in Appendix of this paper.
Coal Mine Security System mainly monitor the parameter in coal mine, like Gas( CH4, CO, etc), Temperature, and so on as well as the main production equipment stop the switch parameter, forecast mine production security information, effectively avoid the occurrence of gas and coal dust explosion significant malignant accident. Compares with the former system, this system subordinate control computer has used the intelligent digital sensor, increased precision of the data acquisition, the expert system module, can provide the solution way when the mine exceptional operation.
A lineament analysis for the Coal Creek mine was conducted by the Technical Support’s Roof Control Division. The image used for this analysis was a Digital Elevation Model (DEM) of the Fork Ridge, Tennessee, seven and one-half minute U.S.G.S. topographic quadrangles. Previous work has indicated that prominently aligned topographic features, can represent structural geologic zones of weakness such as faults and fractures. The lineament analysis for the Coal Creek mine identified 13 lineaments, which were plotted (See Appendix C). One lineament in particular, number 5NE, projects almost exactly across the pillar line of the section on which the fatal accident occurred.
The solution is to incorporate a Fläkt Woods Thrust Fan System. Ventilation can be designed using a CO or NOx sensor monitoring system, so that selected fans run only when necessary. Additional savings are made due to lower pressure main extract fans being used as they do not have to cope with system resistances found in ducted systems.
Local Ventilation uses an air flow rate that is as low as possible, but sufficient to minimise the amount of airborne contaminants entering a specified volume or passing specified point(s). These are usually intended to be at the breathing zone of occupants. This minimisation of air flow can be achieved either by
XPAC Solutions provide users with a smaller learning curve allowing for rapid upskilling of planning personnel while continuing to deliver dependable, consistent mine plans. They reduce your project’s reliance on niche technical skills, reduce the risks of human capital shortfall and free up your senior planners from learning software.
Purpose. The important problem in the field of ecological safety and industrial safety is providing of normal microclimate in dead-end mine working. In these regions of the mine methane gas can be accumulated and as a re- sult explosion may take place. So, to avoid these accidents it is important to ventilate appropriately dead-end mine working. The purpose of the work is development of quick computing mathematical model to obtain information about dead-end mine working ventilation process. Methodology. The process of dead-end mine working ventilation computing is separated in two stages. At the first stage the velocity flow field is computed in the dead-end mine working. We consider the situation when the suction tube is situated in this region. To solve this problem the fluid dynamics model of inviscid gas flow was used. At the second stage of the computational modeling the convective- diffusive equation of admixture transfer was used. The equation takes into account non-uniform flow field in the dead end mine workings. Findings. The developed numerical model was coded using FORTRAN language. The developed computer code allows to perform numerical experiment to assess the efficiency of suction tube imple- mentation to decrease methane gas concentration in dead-end mine working. Originality. The developed numerical model takes into account physical factors, which are not considered nowadays in the empirical models, which are used for solving the problems of dead-end mine working ventilation. It allows taking into account the geometrical form of the dead-end mine working. Practical value. The developed computer program allows to perform calcula- tions to assess the efficiency of suction system used for the ventilation of the dead-end mine working.
1. The purpose of the CLC is to allow local resident concerns to be brought forward to the company for response and possible resolution, and for the company to keep the local community advised of mine developments. The CLC is an advisory body to the company, with a role to facilitate this communication between the