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滇西芒市盆地芒棒组软岩的水文、工程地质特征及其对工程的影响——以芒究煤矿为例
引用本文:吕勇,王宇,甘伏平,蒋忠诚,杜毓超,杨启军,王珽,范鲁舟,杨泰.滇西芒市盆地芒棒组软岩的水文、工程地质特征及其对工程的影响——以芒究煤矿为例[J].中国区域地质,2012(2):382-388.
作者姓名:吕勇  王宇  甘伏平  蒋忠诚  杜毓超  杨启军  王珽  范鲁舟  杨泰
作者单位:[1]中国地质科学院岩溶地质研究所,广西桂林541004 [2]桂林理工大学,广西桂林541004 [3]云南省地质环境监测院,云南昆明650051 [4]云南省199煤田地质队,云南楚雄650000
基金项目:中国地质调查局项目《云南1:5万潞西县幅、平达幅区域地质调查》(编号:1212010784008)
摘    要:滇西芒市盆地是在喜马拉雅构造运动第Ⅱ幕基础上形成的陆相沉积盆地,该盆地中的上新世芒棒组为河湖相沉积体系。根据矿区钻孔资料,芒棒组在工程地质岩组划分上属半固结软岩,可分为砂岩-砂砾岩软弱岩组、粉砂岩软弱岩组和炭质泥岩-煤层软弱岩组3类,各岩组强度依次为P砂-砾

关 键 词:滇西  陆相盆地  煤岩  测井曲线  软弱岩组  降落漏斗

Hydrogeological and engineering geological characteristics of Mangbang Formation soft rocks in Mangshi basin,western Yunnan Province:a case study of the Mangjiu coal mine
LU Yong,WANG Yu,GAN Fu-ping,JIANG Zhong-cheng,DU Yu-chao,YANG Qi-jun,WANG Ting,FAN Lu-zhou,YANG Tai.Hydrogeological and engineering geological characteristics of Mangbang Formation soft rocks in Mangshi basin,western Yunnan Province:a case study of the Mangjiu coal mine[J].Regional Geology of China,2012(2):382-388.
Authors:LU Yong  WANG Yu  GAN Fu-ping  JIANG Zhong-cheng  DU Yu-chao  YANG Qi-jun  WANG Ting  FAN Lu-zhou  YANG Tai
Institution:1.Institute of Karst Geology,CAGS,Guilin 541004,Guangxi,China; 2.Guilin University of Technology,Guilin 541004,Guangxi,China; 3.Yunnan Institute of Geological Environmental Survey,Kunming 650051,Yunnan,China; 4.Yunnan 199 Coal Field Geological Team,Chuxiong 650000,Yunnan,China
Abstract:The Mangshi basin is a continental sedimentary basins formed on the tectonic background of episode II of Himalaya Movement,with the primary filling substance being the river-lacustrine sedimentary system of Mangbang Formation.According to mining and drilling data,the engineering geological consolidation classification of Mangbang Formation is semi-soft rock,which can be divided into sandstone-sandy conglomerate soft rock group,siltstone weak rock group and carbonaceous mudstone-coal weak rock group.The coal seam is of low ash(15%-25%),low sulfur(0.5%-2.5%),semi-dark-half light brown type,and there exists a certain degree of self-ignition,The strength of the rock groups are in order of Psand-gravel Psilt Pmud-charcoal,the logging data and curves show that the coal seam has intermediate apparent resistivity,and the radioactive anomaly curve is obviously different from that of other rocks.The pumping test results show that the permeability coefficient k is in the range of 0.1-0.01,and the radius of the cone of depression is between 77 and 119 m.Although the distance from the Mangshi River to the drilling position is rather short,there is no obvious hydraulic connection,and the poor permeability rock possesses the major part.Mining exploration in the past 50 years has formed a number of mined-out areas and abandoned mined-out areas.Because these gobs are far away from the railway,the mined areas will not pose a threat to railway construction.
Keywords:western Yunnan Province continental basin coal rock logging curve weak rock group depression funnel
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