Potential Evaluation Of Coal Resource In Yanxing Basin, Heilongjiang Province

Yanxing Basin is the Mesozoic coal-bearing basin which located in Luobei County,Hegang C ity.Area in the East Brian-Jiamusi-Xingkai block of Mudanjiang fault,Jiamusi uplift with Taipinggou uplift area.the basins of the basin are the Lower Proterozoic Xingdong rock mass and the basin cover is the Lower Cretaceous C hengzihe Formation(K1ch).Chengzihe Formation can be divided into three sections according to lithology: the bottom is conglomerate section,the middle is coal content section and the upper is mudstone section.It belongs to alluvial fan-river swamp-shore shallow lake sedimentary system.The coal accumulation area is mainly located in The flood plains formed by the north-south rivers and the river swamps formed by the rivers heading south into the lake.Restricted by the tectonic domain of the Pacific Rim,the study area formed a series of normal faults,The boundary faults control the distribution of coal strata,but the faults in the area damage the coal seams.From the results of coal rock identification,the maximum reflectivity of the vitrinite(R0max)was from 0.56-0.68%,the volatiles was from 37.60-41.84%,the lowest calorific value(Q net,ar)was from 19.94-27.59 MJ / kg,and the caking index(G)(3: 3)was from 0-17,the majority is more than 5.So the coal in the study area is mainly belong to long-flame coal,the metamorphism of coal is low.There are 6 layers of minable seam which the coal-bearing local coefficient is 1%.Coal area is about 59km2,forecast coal reserves is(333)164.11 million tons.This paper makes a comprehensive evaluation of the coal resources for the study area.The results show that the area transportation is convenient,the electric power and labor force is sufficient,the exploration and development conditions is superior;the coal is bituminous coal that belong to the medium-high calorific value coal.The toxic and harmful elements are small,mining not make the bad effects for environment.The investment rate of coal resources investment is 60% and the investment recovery period is 1.67 years.The investment return rate is high but the payback period is short.According to the current coal price situation,the economic prospect is good.