Evaluation Of The Mine Geological Environmental Impact In Liushugou Area Limestone Deposit Of Urumqi

The management of mine environment in Xinjiang is imminent.O n the basis of investigating and analyzing the geological environment conditions and mining characteristics of limestone mine in Xinjiang area,this paper selects a single typical limestone mine to study the evaluation system and model of the influence degree of the mine geological environment,and divides the geological environment seriously,seriously and slightly,for the restoration and treatment of the geological environment of the limestone mine.And provide theoretical basis and technical reference for the rational development of mineral resources.This paper takes the Liu Shu Gou limestone mine in Dabancheng District of Urumqi as the research area.Through field investigation and collection and arrangement of the related data of the mine,the geological background data and main geological environment problems of the mine are obtained.On this basis,the evaluation factors are screened by the principal component analysis method,and the geological disasters and the present situation are established.The evaluation index system of four aspects: landform,land resources and mine geological conditions;the fuzzy mathematics method is used to determine the index membership function,the analytic hierarchy process is used to determine the index weight,and the evaluation model based on the grid data transformation and processing function operation based on the Arc GIS platform is applied to the geological environment impact degree of the study area.Combined evaluation and partition.Finally,the following conclusions are drawn.(1)the evaluation effect of the limestone mine geological environment in Xinjiang area is not ideal by using the standard method.The main reasons are:(1)some qualitative indexes are too subjective and have no quantitative index;secondly,the contribution degree of some indexes is low,such as the low water level in the study area,and the aquifer index has no effect in the evaluation.(2)the evaluation index system established through the analysis accords with the geological environment characteristics of the limestone mine in Xinjiang.The main factors are geological disaster B1(the scale of the current geological disaster C1,the prediction of the scale of the geological disaster C2),the current landfor m B2(the ground leading slope C3,the ground elevation C4),and the land resource B3(vegetation coverage).Rate C5,soil structure damage degree C6),mining area geological condition B4(engineering geological group C7,geological structure C8).(3)the operation evaluation model is divided into three areas: serious area,covering an area of 250700 square meters,the distribution range of 1,2,3 Mineral opencast and 1 waste rock;the more serious area,covering an area of 54900 square meters,the distrib ution range of 4,5 open pit,2 stone waste,minor area,covering area 859300 Square meters are distributed in five open stope and two other areas outside the quarry.(4)The results of the evaluation are ideal,but there are also shortcomings.The accuracy of the model is precise,the partition boundary is clear,and the probability of misjudgement is approximately 0.21%;The partition of the evaluation model is basically consistent with the standard method zoning.