With the mine exploitation depth getting deeper and deeper, the mine heat-harm turns into another natural disaster after the five disasters, which are the roof, the gas, the fire, the dust and the flood disaster. Comp...With the mine exploitation depth getting deeper and deeper, the mine heat-harm turns into another natural disaster after the five disasters, which are the roof, the gas, the fire, the dust and the flood disaster. Compared with other researches on prevention and cure against the heat-harm, the research on prevention and cure against the heat-harm in constructing mine are less. Referring to the experience of prevention and cure against the heat-harm home and ＇abroad, analyzing the characteristic of cooling in the constructing mine, and based on the ground former freezing equipments and the modified mine temporary cooling equipments, the paper proposed four technical projects. By comparing with the four technical projects, the second project is preponderant both in technology and economy and can solve the heat-harm of the constructing mine, which is proved by the forecast and calculation. The project can be widely applied in de-temperature tasks of high temperature and heat-harm mines during the mine constructing period and in the exploiting preparing phase.展开更多
In recent years, many coal-producing countries have paid great atte ntion to the land subsidence caused by coal cutting. In China, because of the de nse population in coalfield areas, the land subsidence hazard is mor...In recent years, many coal-producing countries have paid great atte ntion to the land subsidence caused by coal cutting. In China, because of the de nse population in coalfield areas, the land subsidence hazard is more serious. A fter a brief analysis on the mechanism of land subsidence, this paper gives a co mprehensive and systematical account on all kinds of hazards caused by the land subsidence in China. The study shows that land subsidence has endangered land, b uildings, traffic and communication lines, dykes and dams. It also causes damage to ecological and social environment. In order to lessen the hazard of land sub sidence, preventive measures should be taken to reduce the collapse amount, such as extraction with stowing, banded mining system, succession and coordination m ining system, or high-pressure mudflow between rock strata. Measures of reinfor cing or moving certain buildings should also be taken to reduce the destructive degree. In order to harness the subsidence land and bring them under control for farming, measures should be taken such as filling with spoil or fine breeze, ex cavating the deeper and covering the shallower land.展开更多
Based on cooperative theories and analysis of characters of safety and production in coal mines, discussed the relationship and function of cooperative development between safety and production and established a basic...Based on cooperative theories and analysis of characters of safety and production in coal mines, discussed the relationship and function of cooperative development between safety and production and established a basic cooperative development model. At the same time, a systemic expatiation of the basic principle, the core conception and the contents of the model was given. In the end, the guarantee measures for realization were proposed. The result of the research may have some leading meaning to ensure safety and production in coal enterprises and to achieve synchronous exaltation of production efficiency and the safety degree.展开更多
The current practice of rock/coal outburst monitoring, prevention and control was reviewed. The uncertainty of major factors contributing to the occurrence of such hazards and the complexicity of mining conditions sur...The current practice of rock/coal outburst monitoring, prevention and control was reviewed. The uncertainty of major factors contributing to the occurrence of such hazards and the complexicity of mining conditions surrounding the occurrence were analyzed. A strategic concept for rock/coal outburst prevention was introduced. The objective is to identify the bursting potential in an area, rather than predicting the bursting, by introducing a multi- dimension index model： potential-of-bursting （POB）, taking into consideration major contributing factors. In application, once the index has passed certain critical level indicating high risk, actions must be taken to reduce the bursting potential and to effectively prevent the hazard from occurring. A conceptual 2D model involving stress and methane pressure was described to demonstrate the methodology for determining the POB. However in practice, a POB model has to be established through experiments, field monitoring and calibration against case studies. To achieve this objective, coordinated research and international collaboration will be needed.展开更多
The ongoing processes of spatial transformation of post-industrial regions attract people＇s attention, and they show new possibilities of development but they are also related with new challenges. A deep analysis of ...The ongoing processes of spatial transformation of post-industrial regions attract people＇s attention, and they show new possibilities of development but they are also related with new challenges. A deep analysis of known patterns must be an important lesson as, first of all, we observe transformation of other regions, which gives rise to a question about the possibility of using positive model solutions in other urban contexts. Moreover, in every action contributing to the development of a region with traditions, we should use every potential, understood as accumulated energy and closed in facilities, individuals and their mutual relations. The article is divided into five parts： （1） a short history of Nord-Pas de Calais; （2） a significant introduction to history and spatial issues; （3） a description of corrective measures undertaken on the basis of, e.g., an urban analysis from the moment of taking a decision on ceasing coal mine extraction until today; （4） a description of＂a concept for the region＂; （5） conclusions---including a catalogue of actions, prepared by the author, where an important aspect will be the use of elements of spatial values and spatial identity of regions in the process of planning spatial, social and economic transformation. In the article, the results of studies conducted in years 2010-2015, based on statistical data analysis, strategic documents analysis and an on-site visit are presented.展开更多
With ever-increasing depth of coal mine and the continuous improvement of mechanization, heat damage has become one of the major disasters in coal mine exploitation. Established the temperature prediction models suita...With ever-increasing depth of coal mine and the continuous improvement of mechanization, heat damage has become one of the major disasters in coal mine exploitation. Established the temperature prediction models suitable for different kinds of tunnels through analysis of the heat of shafts, roadways and working faces. The average annual air temperature prediction equation from the inlets of shafts to the working faces was derived. The formula was deduced using combine method of iteration and direct calculation. The method can improve the precision of air temperature prediction, so we could establish the whole pathway air temperature prediction model with high precision. Emphasizing on the effects of leakage air to air temperature of working face and using the ideology of the finite difference method and considering the differential equation of inlet and outlet at different stages, this method can significantly improve the accuracy of temperature prediction. Program development uses Visual Basic 6.0 Language, and the Origin software was used to fit the relevant data. The predicted results shows that the air temperature generally tends to rapidly increase in the air inlet, then changes slowly on working face, and finally increases sharply in air outlet in the condition of goaf air leakage. The condition is in general consistent with the air temperature change tendency of working face with U-type ventilation system. The software can provide reliable scientific basis for reasonable ventilation, cooling measures and management of coal mine thermal hazards.展开更多
文摘With the mine exploitation depth getting deeper and deeper, the mine heat-harm turns into another natural disaster after the five disasters, which are the roof, the gas, the fire, the dust and the flood disaster. Compared with other researches on prevention and cure against the heat-harm, the research on prevention and cure against the heat-harm in constructing mine are less. Referring to the experience of prevention and cure against the heat-harm home and ＇abroad, analyzing the characteristic of cooling in the constructing mine, and based on the ground former freezing equipments and the modified mine temporary cooling equipments, the paper proposed four technical projects. By comparing with the four technical projects, the second project is preponderant both in technology and economy and can solve the heat-harm of the constructing mine, which is proved by the forecast and calculation. The project can be widely applied in de-temperature tasks of high temperature and heat-harm mines during the mine constructing period and in the exploiting preparing phase.
文摘In recent years, many coal-producing countries have paid great atte ntion to the land subsidence caused by coal cutting. In China, because of the de nse population in coalfield areas, the land subsidence hazard is more serious. A fter a brief analysis on the mechanism of land subsidence, this paper gives a co mprehensive and systematical account on all kinds of hazards caused by the land subsidence in China. The study shows that land subsidence has endangered land, b uildings, traffic and communication lines, dykes and dams. It also causes damage to ecological and social environment. In order to lessen the hazard of land sub sidence, preventive measures should be taken to reduce the collapse amount, such as extraction with stowing, banded mining system, succession and coordination m ining system, or high-pressure mudflow between rock strata. Measures of reinfor cing or moving certain buildings should also be taken to reduce the destructive degree. In order to harness the subsidence land and bring them under control for farming, measures should be taken such as filling with spoil or fine breeze, ex cavating the deeper and covering the shallower land.
文摘Based on cooperative theories and analysis of characters of safety and production in coal mines, discussed the relationship and function of cooperative development between safety and production and established a basic cooperative development model. At the same time, a systemic expatiation of the basic principle, the core conception and the contents of the model was given. In the end, the guarantee measures for realization were proposed. The result of the research may have some leading meaning to ensure safety and production in coal enterprises and to achieve synchronous exaltation of production efficiency and the safety degree.
基金Supported by the National Natural Science Foundation of China（50534080） the Program for New Century Excellent Talents in University of China （NCET-05-0602）
文摘The current practice of rock/coal outburst monitoring, prevention and control was reviewed. The uncertainty of major factors contributing to the occurrence of such hazards and the complexicity of mining conditions surrounding the occurrence were analyzed. A strategic concept for rock/coal outburst prevention was introduced. The objective is to identify the bursting potential in an area, rather than predicting the bursting, by introducing a multi- dimension index model： potential-of-bursting （POB）, taking into consideration major contributing factors. In application, once the index has passed certain critical level indicating high risk, actions must be taken to reduce the bursting potential and to effectively prevent the hazard from occurring. A conceptual 2D model involving stress and methane pressure was described to demonstrate the methodology for determining the POB. However in practice, a POB model has to be established through experiments, field monitoring and calibration against case studies. To achieve this objective, coordinated research and international collaboration will be needed.
文摘The ongoing processes of spatial transformation of post-industrial regions attract people＇s attention, and they show new possibilities of development but they are also related with new challenges. A deep analysis of known patterns must be an important lesson as, first of all, we observe transformation of other regions, which gives rise to a question about the possibility of using positive model solutions in other urban contexts. Moreover, in every action contributing to the development of a region with traditions, we should use every potential, understood as accumulated energy and closed in facilities, individuals and their mutual relations. The article is divided into five parts： （1） a short history of Nord-Pas de Calais; （2） a significant introduction to history and spatial issues; （3） a description of corrective measures undertaken on the basis of, e.g., an urban analysis from the moment of taking a decision on ceasing coal mine extraction until today; （4） a description of＂a concept for the region＂; （5） conclusions---including a catalogue of actions, prepared by the author, where an important aspect will be the use of elements of spatial values and spatial identity of regions in the process of planning spatial, social and economic transformation. In the article, the results of studies conducted in years 2010-2015, based on statistical data analysis, strategic documents analysis and an on-site visit are presented.
基金Supported by the National Natural Science Foundation of China （50674091） Fundamental Research Funds for the Central Universities （2010YZ01 ） The authors gratefully acknowledge the contributions of The National Natural Science Foundation and Fundamental Research Funds for the Central Universities for funding this study.
文摘With ever-increasing depth of coal mine and the continuous improvement of mechanization, heat damage has become one of the major disasters in coal mine exploitation. Established the temperature prediction models suitable for different kinds of tunnels through analysis of the heat of shafts, roadways and working faces. The average annual air temperature prediction equation from the inlets of shafts to the working faces was derived. The formula was deduced using combine method of iteration and direct calculation. The method can improve the precision of air temperature prediction, so we could establish the whole pathway air temperature prediction model with high precision. Emphasizing on the effects of leakage air to air temperature of working face and using the ideology of the finite difference method and considering the differential equation of inlet and outlet at different stages, this method can significantly improve the accuracy of temperature prediction. Program development uses Visual Basic 6.0 Language, and the Origin software was used to fit the relevant data. The predicted results shows that the air temperature generally tends to rapidly increase in the air inlet, then changes slowly on working face, and finally increases sharply in air outlet in the condition of goaf air leakage. The condition is in general consistent with the air temperature change tendency of working face with U-type ventilation system. The software can provide reliable scientific basis for reasonable ventilation, cooling measures and management of coal mine thermal hazards.
