煤田地质与勘探
煤田地質與勘探
매전지질여감탐
COAL GEOLOGY & EXPLORATION
2013年
4期
14-17
,共4页
瓦斯风化带%瓦斯地质%瓦斯异常
瓦斯風化帶%瓦斯地質%瓦斯異常
와사풍화대%와사지질%와사이상
gas weathered zone%coalbed gas geology%abnormal gas
在瓦斯风化带内开采煤层，瓦斯一般不会对生产构成主要威胁，但笔者在宁东矿区某矿瓦斯风化带内施工地质检查孔时却发现了高浓度的甲烷气体。通过区域地质分析和工程探测研究，发现该区域因受地质构造影响，在顶板砂岩中有游离瓦斯聚集，经过针对性钻孔抽采，3个月抽采了近200万m3的纯瓦斯。这说明在封闭条件下的瓦斯风化带内，仍可能出现瓦斯集中赋存的区域。
在瓦斯風化帶內開採煤層，瓦斯一般不會對生產構成主要威脅，但筆者在寧東礦區某礦瓦斯風化帶內施工地質檢查孔時卻髮現瞭高濃度的甲烷氣體。通過區域地質分析和工程探測研究，髮現該區域因受地質構造影響，在頂闆砂巖中有遊離瓦斯聚集，經過針對性鑽孔抽採，3箇月抽採瞭近200萬m3的純瓦斯。這說明在封閉條件下的瓦斯風化帶內，仍可能齣現瓦斯集中賦存的區域。
재와사풍화대내개채매층，와사일반불회대생산구성주요위협，단필자재저동광구모광와사풍화대내시공지질검사공시각발현료고농도적갑완기체。통과구역지질분석화공정탐측연구，발현해구역인수지질구조영향，재정판사암중유유리와사취집，경과침대성찬공추채，3개월추채료근200만m3적순와사。저설명재봉폐조건하적와사풍화대내，잉가능출현와사집중부존적구역。
During mining in gas weathered zone, the gas is not a major threat to production. But in this research, the high concentration of methane gas is found from the geological inspection drilling in the gas weathered zone for colliery construction. Through regional geological analysis and the geology exploration, it is found that in the ini-tial district in arched structure zone, there is free gas accumulation in sandstone in roof due to the influence of geological structure. Through targeted gas drainage by boreholes, nearly 200 million m3 of pure gas were drained during 3 months. The study results indicated that there may exist an area with high gas concentration in gas weath-ered zone with closure conditions.
