内蒙古红树梁煤矿浅埋煤层风化带圈定

Delineation of Weathering Oxidation Zone of Shallow Coal Seam in Hongshuliang Coal Mine,Inner Mongolia

煤层风氧化带的确定是煤田地质勘探的重要内容之一,是煤田勘探和储量计算阶段的一项重要任务,其特征是矿井设计、煤层开采的重要依据。根据以往勘探资料分析得知:红树梁煤矿一盘区西南区域6号煤层存在煤层风氧化情况,而风氧化带范围、程度及煤质化验具体情况不甚清楚,影响首采区矿井设计及6号煤层工作面布置。采用地面物探、钻探、地球物理测井、取煤岩心化验法相结合综合勘查手段,圈定了矿区6号煤层风化带的范围,结合该地区地层(煤层)走向、倾向、沉积情况等资料,判断煤层自西南向西北风氧化带变化趋势为由重到轻。

Determination of weathering oxidation zone in coal seam is one of the important contents of coalfield geological exploration and is also an essential task in the stage of coal exploration and reserves calculation.In addition,the characteristics of weathering oxidation zone in coal seam are the significant basis for coal mine design and coal seam mining.According to the analysis of previous exploration data,it is known that there is weathering oxidation zone in coal seam in the No.6 coal seam which is located in the southwest area of the first panel of Hongshuliang Coal Mine.However,the scope and extent of the weathering oxidation zone in coal seam and the specific coal quality are not clear,which affects the mine design of the first mining area and the layout of the No.6 coal seam working face.In this study,the scope of weathering oxidation zone in the No.6 coal seam is delineated using a comprehensive exploration method combining ground geophysical prospecting,drilling,geophysical logging,and coal core testing.Considering the strata(coal seam)trend,inclination,sedimentation and other data in this area,it is judged that the weathering oxidation zone in coal seam changes from heavy to light from the southwest to the northwest.