| At present, the study of mine geological environment problem has switch from qualitative analysis to semi quantitative-quantitative analysis. With the development of technology and computer technology, there are more and more methods for fixed quantity estimate of mine geological environment quality, and our country have put more and more attention to protecting and treating geological environment. Therefore, it has important meaning that dividing mine geological environment properly, make country and district carry the case of protecting and treating geological environment into execution directively.This paper is based on the geological survey item of China geological survey. The item mine geological environment survey and estimate of GuangDong province, has expatiated in detail in the problem of quantitative assessment of mine geological environment synthesis zoning study. This paper is required by combine with reality project. It can solve the problem of reality project, provide basal survey data and general zoning gist for mine geological environment programming in countrywide, and mine geological environment programming in GuangDong province and the prophylaxis and treatment of mine geological environment problem.The study present status of quality subarea in our country and foreign is discussed in this paper. The main problem is found out through analysis and at the same time the trend in development of quality subarea is also studied. The principal factors,the slave factors and the inducing factors that influence the main environmental geological problem are researched according to the geological environment state which includes the distribution of mineral resources,the exploitation status and conservation stage of mine and so on. The analytic hierarchy process(AHP)which can turn multiple attribute to objective quantitative evaluation or subjective effectiveness is used to divide the quality grade of geological environment.We divided the factors which affect the geological environment quality to 6 Criterion levels and 17 measure levels. The equation of correlation is established according to the response relations of factors which affect the mine geological environment quality by determine the combination weight of each attribute target that relative to the total target level. The overall merit index of mine which can evaluate the geological environment quality is gained from the correlation In this paper the mine geological environment of Guangdong province is classed to three zones according to the practical situation of typical mine,they are serious zone,secondary serious zone and general zone. And in response to the kind of mine and the degree of the effects the serious zone can be divided to 17 sub zones,and secondary serious zone to 25 sub zones.We get several cognitions through the study:1,Questions of mine environmental geology and diversities of geological hazards in GUANGDONG province are decided by characteristic of mine geologic environment in this area.(1)Tropic of cancer traverses middle part of mainland of Guangdong the vegetation is upland evergreen broadleaf primary, and evergreen seasonal rain forest assistant. rock and soil body weathering strongly because of tropical rain climate and ample sunlight, which induce fixation of vegetation feeble, geological hazards often occur such as collapsing,landside,debris flow,and soil and water loss etc. These hazards are caused by natural and human causes such as strong rain or exploitation.(2) In Guangdong province, Carbonate rock distribution is comprehensive, surface water development and groundwater flow is circulated. Intensive conversions of matter energy between different water bodies cause karst cave and soil cave in the area where dissoluble rock exist. On the other hand, mine exploitation accelerate collapsing occurrence of earth surface of drainage. In addition, underground mine excavation such as coal mine, lead-zinc mine, and iron mine, which induce guag or safety posts were excavated. This makes arch crow rock collapse for self-gravity or rain infiltration or large artificial load. Earth surface collapse is one types of geology casualty frequently happen in Guangdong province and caused large loss.(3)Terrence in Guangdong province have been undergone four cyclic server crush movement, and format a series of various scale , direction , quality crushes major in east north. These deep and slit crushes control the new surface tectonic process and the stability of area crush of the earth.2,The mine geological environment quality is affected by several factors. The leading factor is mine and other mankind activities. The subordinate factor is geological environmental conditions. The inducing factor is great rainfall and other mankind engineering activities.(1)According to the production status of mine industry in China for many years, some problems as high energy consumption, multi-pollution and the low efficiency of comprehensive reciprocation from resources exist. Especially in the Collective and Individual mine companies, approximately composed 97% in the whole province, there are also some problems, on the most of mine. The mineral resources are badly wasted, due to lowness product technology, such as low recovery percentage, backward management, far less input than output, irregular mine, and abuse of mineral resources, desperate excavation and removal of mine, etc.. Besides these, being lack of protections and solutions of environment, mine resources is badly wasted,so as to be harm to mine geological environment quality.(2)With the exploitation of mine resources, illogical exploiting and using prink up many kinds of geological disasters and lots of environment geological problems. Environmental geological problems and mine geological disasters are appeared more seriously than before. It not only threatens the significant benefit to the life and possession security of a country, but also seriously restricts the development of national economy.3,In the mine geological environmental condition similar situation, cause of mine geologic environmental problems and geological hazards have close relationship with mine's exploitation. In opencast mine, the primary geologic environmental problems and geological hazards was occupancy and destroyed the land, break of the ground water balanced and the avalanche, the landslide, the surface collapse by drain aging and so on. The loss and incidence so little ,but the underground mine's have surface collapse of worked out area and land subsidence geologic problems the loss and incidence was more than opencast mine.4,Many kinds of methods can be used to divide the environmental quality of mine geology , but it's hard to resolve this problem how to attribute evaluate which can reflect the practical situation completely, those was the fundamental job in comprehensive partition to the environmental quality of mine geology .Contrast the conclusion made by this study with practical situation ,it reflected the practice of mine geologic environmental quality basically ,it will be have a better prospects used in practice.5,Comprehensive partition to the mine geologic environment more effectively, it may achieve maximum results with little effort to control and protect the mine geologic environment.
|
PDF Full Text Request