Abstract
Water is the key factor to ensure plant survival in the process of ecological restoration in the coal base of China northwest deserts. On the premise of meeting the mine production and living water demands, we should take measures such as dirt wastewater treatment and water-saving irrigation to increase income and reduce expenditure and allocate limited water re-sources rationally, to provide mining area ecological restoration maximum usable water resources. The mining dump has large slope and thin soil layer and it is easy to produce surface runoff. So it is particularly important to study the irrigation technology needed to satisfy vegetation restoration, on the premise of guaranteeing not to produce surface runoff and the slope stability. In this paper, through field plot test, the suitable irrigation method for mine slope, slope surface soil moisture migration characteristics and slope stability analysis were studied. Results show that three slope ir-rigation technologies have their own advantages and disadvantages. On the whole, the effect of drip irrigation is the best, micro spray irrigation is the second, infiltrating irrigation is not ideal. The permeability of mine soil slope is very strong, the infiltration rate of the slope direction is the high-est, inverse slope infiltration rate is lowest. In the process of irrigation, with the increase of soil moisture content, slope safety factor is the decreased obviously, the whole slope surface soil moisture content is 14% for the slope stability safety threshold.
Highlights
IntroductionFurther coordination of energy economic development and ecological environment protection is one of the prominent problems in the process of energy development in various regions [Wu et al, 2014; Li & Jiang, 2004; Yang, 2015]
Further coordination of energy economic development and ecological environment protection is one of the prominent problems in the process of energy development in various regions [Wu et al, 2014; Li & Jiang, 2004; Yang, 2015]. It is more serious in the northwest arid desert coal base, because of drought, water shortage and heavy damage of the local limited surface water and groundwater resources
For the vegetation restoration of the waste dump slope, irrigation is one of the main means to ensure the water needed for the growth and development of vegetation on the slope
Summary
Further coordination of energy economic development and ecological environment protection is one of the prominent problems in the process of energy development in various regions [Wu et al, 2014; Li & Jiang, 2004; Yang, 2015] It is more serious in the northwest arid desert coal base, because of drought, water shortage and heavy damage of the local limited surface water and groundwater resources. It has an important guiding role to choose suitable way of irrigation, reasonable layout of irrigation, and developing an irrigation system It has important scientific significance for perfecting our country mining area land reclamation technology system and theory, improving the scientific technology content of coal development ecological restoration and promoting regional scientific and technological progress. It can provide technical support for ecological security in northwest arid desert coal base
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