Undergroud Coal Gasification Process Characteristics Of Roof Rock Permeability

As a non-renewable resources of coal resources, played a leading role in China’s energy structure. With the rapid development of society, the coal resources sleepy faces a severe test. Traditional methods of coal mining caused a serious waste of resources, in order to meet the needs of advanced productive forces, underground coal gasification technology began to be widely applied.Underground coal gasification technology compared to conventional mining method has many advantages, this technology can be applied in relatively difficult underground mining coal, coal seam gas, such as high, thin coal seams, more complex geological conditions of deep coal seams or an effective solution coal mining waste problems. Underground coal gasification technology to reduce underground mining upfront investment can quickly obtain economic benefits. However, underground coal gasification technology is not able to be applied to any seams, which itself has some limitations. Process of underground coal gasification and coal-bed methane gas exploration in a large number of liquid waste, whether environmental pollution caused by waste underground coal gasification technology is an important factor in the feasibility. Underground coal gasification waste generated by coal seam permeability rock, whether the waste can be an important cause of the underground environment is contaminated by rocks.This paper explores whether Wulanchabu mining underground coal gasification technology can be applied. According to the geological conditions of the coal mine have seen the top of groundwater bodies, underground coal gasification waste water affect whether the technology is the key to whether the decision Wulanchabu mining applications. In order to demonstrate whether the gasification products pollute the water, we permeability of the laws of the seam roof rocks were studied.Underground Coal Gasification is a process of heating, permeability of rocks at different temperatures in different, larger temperature on the permeability of the rock. The key factor in the coal gasification process also affect the pore pressure of the rock permeability characteristics of different permeability rocks of different pore pressure. Taiyuan University of Technology has independently developed the use of high temperature triaxial permeability test rig to simulate Wulanchabu rock underground mining environment, select the appropriate axial pressure, confining pressure, different temperatures for different lithological rock specimens each experimental research and analysis. Get the temperature coefficient of permeability of the rock and pore pressure curves for the analysis of underground coal gasification technology can be applied to provide a theoretical basis Wulanchabu mine.