The site drilling packer permeability test and TEM to the 2100 workface in Gucheng coalmine determined the two-zone height under sublevel strip mining.The conclusion considers that the lying strata deterioration law o...The site drilling packer permeability test and TEM to the 2100 workface in Gucheng coalmine determined the two-zone height under sublevel strip mining.The conclusion considers that the lying strata deterioration law of the strip mining is similar to that of the sublevel mining.Thus, against that the actually measured data lacked, it is feasible to refer to the reservation of the waterproof coal pillar in the neighbor coalmine under sublevel situation.However, it is necessary to further launch the research on lying strata deterioration law under sublevel striping mining for the purpose of providing the right foundation for the layout of the workface not mined so far and the reservation of the waterproof coal pillar in the mining area.展开更多
It is an important part of green mining to control the disasters of coal mining which have caused irreversible damages to buildings and ecological environment. Strip mining is one of the efficient measures to control ...It is an important part of green mining to control the disasters of coal mining which have caused irreversible damages to buildings and ecological environment. Strip mining is one of the efficient measures to control surface subsidence and mining damage. However, the research on the laws of the surface subsidence are still deficient in multi-coal seam strip mining at present. Based on the Fast Lagrangian Analysis of Continua(short for FLAC3D) numerical simulation software, the laws of the surface subsidence and horizontal movement were systematically studied for different depths, different mining widths, different distances between seams, different mining thickness, different parameters between seams and the special relations of the upper pillar and the lower pillar in the vertical direction in multi-seam strip mining. The function relation between the maximum subsidence and the maximum horizontal movement with the depth, the mining width, the seam distance, mining thickness, different parameters between seams and the partial offset are summarized respectively. Finally the formula integrating the surface maximum subsidence value and the maximum horizontal movement was deduced. The results can be used for reference theory and measure in forecasting the surface displacement in multi-coal seam strip mining.展开更多
This paper focuses on the village coal pillar under huge thick loose bed and thin bedrock over high prelatic water level at the north of the Yellow River. The strip mining technology was used to protect the village ho...This paper focuses on the village coal pillar under huge thick loose bed and thin bedrock over high prelatic water level at the north of the Yellow River. The strip mining technology was used to protect the village houses. The stratum structure control action of mining subsidence was used to design the mining and pillar width. To further raise resources recovery, we adopted the mutative scheme of mining and pillar width. Observation was carried out while mining. Research shows there is feasibility of the strip mining technology to protecting the village buildings of the village coal pillar under huge thick loose bed and thin bedrock over high prelatic water level at the north of the Yellow River. Finally, subsidence parameters of strip mining were obtained. It is the basic data of the strip mining of the coal field at the north of the Yellow River.展开更多
With the discrete element method, the simulation and analysis of a series of numerical models were made. This research revealed ground movement laws for strip mining under thick alluvium and gave calculation formulae ...With the discrete element method, the simulation and analysis of a series of numerical models were made. This research revealed ground movement laws for strip mining under thick alluvium and gave calculation formulae for the maximum ground subsidence and horizontal movement as a function of basement rock thickness and mining width, thus providing sound evidence for future strip mining under thick alluvium.展开更多
Strip mining is one of the efficient measures to control surface subsidence and mining damage.However,the researches on the laws of the geological mining factors to upper and lower pillar's stability are still def...Strip mining is one of the efficient measures to control surface subsidence and mining damage.However,the researches on the laws of the geological mining factors to upper and lower pillar's stability are still deficient in multi-coal seam strip mining at present.Based on the three dimension fast Lagrangian analysis of continua(short for FLAC3D)numerical simulation software,the laws of the stress increasing coefficient on the coal pillar and its stability were systematically studied for different depths,different mining widths,different interlayer spacings,different mining thicknesses,different properties of interstratified rock and the spacial relations of the upper and lower pillars in vertical alignment in multi-coal seam strip mining.The function relation between the stress increasing coefficient of upper and lower pillars with the mining depth,mining widths,interlayer spacing,mining thickness,property of interstratified rock and the spatial relationship were obtained.展开更多
Focused upon the dynamic changing regularity and tendency of overburden movement and bed separation developing during the strip mining and stoping under rail- ways were simulated by ANSYS model.The results show that m...Focused upon the dynamic changing regularity and tendency of overburden movement and bed separation developing during the strip mining and stoping under rail- ways were simulated by ANSYS model.The results show that movement and rheology developing of key strata is one of the main reasons to cause surface subsidence and to further induce deformation of surface railways.It provids a basis for taking efficient meas- ures to control the deformation of surface railways.展开更多
Strip pillar mining is one of the most important technical measures to control mining subsidence in China.Mining depth is one of the most important factors that can affect the mining subsidence in strip pillar mining....Strip pillar mining is one of the most important technical measures to control mining subsidence in China.Mining depth is one of the most important factors that can affect the mining subsidence in strip pillar mining.Six numerical simulation models were set up to simulate the surface subsidence of strip pillar mining in different mining depths.The mining depth in these six models ranges from 300 to 800 m.The simulated results were compared and analyzed.The formula was established based on the simulated results.It demonstrated that the subsidence of strip pillar mining method is related to mining depth.While the other conditions are the same,the subsidence of strip pillar mining increases with the increase of mining depth by logarithmic relationship.展开更多
基金Supported by Fujian Administration of Education for Science Research (JB08232)the State Key Development Program for Basic Research of China(2006CB202200)
文摘The site drilling packer permeability test and TEM to the 2100 workface in Gucheng coalmine determined the two-zone height under sublevel strip mining.The conclusion considers that the lying strata deterioration law of the strip mining is similar to that of the sublevel mining.Thus, against that the actually measured data lacked, it is feasible to refer to the reservation of the waterproof coal pillar in the neighbor coalmine under sublevel situation.However, it is necessary to further launch the research on lying strata deterioration law under sublevel striping mining for the purpose of providing the right foundation for the layout of the workface not mined so far and the reservation of the waterproof coal pillar in the mining area.
基金Funded by the Scientific Program of Hunan Provincial Science and Technology Department(2014FJ3104)Scientific Program of Hunan Provincial Education Department(13C313)
文摘It is an important part of green mining to control the disasters of coal mining which have caused irreversible damages to buildings and ecological environment. Strip mining is one of the efficient measures to control surface subsidence and mining damage. However, the research on the laws of the surface subsidence are still deficient in multi-coal seam strip mining at present. Based on the Fast Lagrangian Analysis of Continua(short for FLAC3D) numerical simulation software, the laws of the surface subsidence and horizontal movement were systematically studied for different depths, different mining widths, different distances between seams, different mining thickness, different parameters between seams and the special relations of the upper pillar and the lower pillar in the vertical direction in multi-seam strip mining. The function relation between the maximum subsidence and the maximum horizontal movement with the depth, the mining width, the seam distance, mining thickness, different parameters between seams and the partial offset are summarized respectively. Finally the formula integrating the surface maximum subsidence value and the maximum horizontal movement was deduced. The results can be used for reference theory and measure in forecasting the surface displacement in multi-coal seam strip mining.
文摘This paper focuses on the village coal pillar under huge thick loose bed and thin bedrock over high prelatic water level at the north of the Yellow River. The strip mining technology was used to protect the village houses. The stratum structure control action of mining subsidence was used to design the mining and pillar width. To further raise resources recovery, we adopted the mutative scheme of mining and pillar width. Observation was carried out while mining. Research shows there is feasibility of the strip mining technology to protecting the village buildings of the village coal pillar under huge thick loose bed and thin bedrock over high prelatic water level at the north of the Yellow River. Finally, subsidence parameters of strip mining were obtained. It is the basic data of the strip mining of the coal field at the north of the Yellow River.
基金National Natural Science Foundation of China (5 98740 2 9) and F oundation of University Key Teacher by the Min-istry of Education
文摘With the discrete element method, the simulation and analysis of a series of numerical models were made. This research revealed ground movement laws for strip mining under thick alluvium and gave calculation formulae for the maximum ground subsidence and horizontal movement as a function of basement rock thickness and mining width, thus providing sound evidence for future strip mining under thick alluvium.
基金Project(KLM200909)supported by Key Laboratory of Mine Spatial Information Technologies(Henan Polytechnic University,Henan Bureau of Surveying&Mapping),State Bureau of Surveying and Mapping
文摘Strip mining is one of the efficient measures to control surface subsidence and mining damage.However,the researches on the laws of the geological mining factors to upper and lower pillar's stability are still deficient in multi-coal seam strip mining at present.Based on the three dimension fast Lagrangian analysis of continua(short for FLAC3D)numerical simulation software,the laws of the stress increasing coefficient on the coal pillar and its stability were systematically studied for different depths,different mining widths,different interlayer spacings,different mining thicknesses,different properties of interstratified rock and the spacial relations of the upper and lower pillars in vertical alignment in multi-coal seam strip mining.The function relation between the stress increasing coefficient of upper and lower pillars with the mining depth,mining widths,interlayer spacing,mining thickness,property of interstratified rock and the spatial relationship were obtained.
基金the National Natural Science Funds Committee(50174035)
文摘Focused upon the dynamic changing regularity and tendency of overburden movement and bed separation developing during the strip mining and stoping under rail- ways were simulated by ANSYS model.The results show that movement and rheology developing of key strata is one of the main reasons to cause surface subsidence and to further induce deformation of surface railways.It provids a basis for taking efficient meas- ures to control the deformation of surface railways.
基金Project(50974053)supported by the National Natural Science Foundation of China
文摘Strip pillar mining is one of the most important technical measures to control mining subsidence in China.Mining depth is one of the most important factors that can affect the mining subsidence in strip pillar mining.Six numerical simulation models were set up to simulate the surface subsidence of strip pillar mining in different mining depths.The mining depth in these six models ranges from 300 to 800 m.The simulated results were compared and analyzed.The formula was established based on the simulated results.It demonstrated that the subsidence of strip pillar mining method is related to mining depth.While the other conditions are the same,the subsidence of strip pillar mining increases with the increase of mining depth by logarithmic relationship.
