湖南宁乡大成桥充水矿山疏干区岩溶系统水气压力监测及突变特征

湖南煤炭坝煤矿是我国著名的大水矿山,开采标高已降至-400m,每小时排水量11 000m3。长期的疏干排水,已形成面积达219.19km2的地下水降落漏斗。以往的调查资料表明,矿山疏干诱发的岩溶塌陷主要发生在疏干开始、地下水位下降到基岩面附近、矿坑发生突水突泥灾害等3个阶段,在疏干区应该无诱发因素导致岩溶塌陷的发生。但近年来煤炭坝煤矿疏干区大成桥的岩溶塌陷特征表明,尽管相关部门采取了一系列处置措施,但岩溶塌陷仍然频繁发生。为了进一步揭示该地区岩溶塌陷发育规律,使处置决策更加科学化,作者所在团队选择大成桥为典型区,通过岩溶系统地下水气压力监测,分析诱发岩溶塌陷的动力来源及其变化规律。结果表明,疏...

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Bibliographic Details
Published in中国岩溶 Vol. 35; no. 2; pp. 179 - 189
Main Author 蒋小珍 雷明堂 管振德
Format Journal Article
LanguageChinese
Published 中国地质科学院岩溶地质研究所/中国地质科学院岩溶塌陷防治重点实验室,广西 桂林,541004 2016
Subjects
大水矿床疏干
岩溶塌陷
水气压力监测
湖南煤炭坝
岩溶塌陷
monitoring of water and gas
Meitanba
drainage of karst water filling mine
水气压力监测
karst collapse
大水矿床疏干
湖南煤炭坝
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ISSN1001-4810
DOI10.11932/karst20160207

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Summary:湖南煤炭坝煤矿是我国著名的大水矿山,开采标高已降至-400m,每小时排水量11 000m3。长期的疏干排水,已形成面积达219.19km2的地下水降落漏斗。以往的调查资料表明,矿山疏干诱发的岩溶塌陷主要发生在疏干开始、地下水位下降到基岩面附近、矿坑发生突水突泥灾害等3个阶段,在疏干区应该无诱发因素导致岩溶塌陷的发生。但近年来煤炭坝煤矿疏干区大成桥的岩溶塌陷特征表明,尽管相关部门采取了一系列处置措施,但岩溶塌陷仍然频繁发生。为了进一步揭示该地区岩溶塌陷发育规律,使处置决策更加科学化,作者所在团队选择大成桥为典型区,通过岩溶系统地下水气压力监测,分析诱发岩溶塌陷的动力来源及其变化规律。结果表明,疏干区岩溶管道裂隙系统中水气压力突变现象极为明显,年最大变幅达54.72m,瞬时水气压力变化速率最大为70.6cm/min,造成这一现象的主要原因是气爆、地下洞穴（溶洞、土洞）垮塌。
Bibliography:45-1157/P
JIANG Xiao-zhen,LEI Ming-tang, GUAN Zhen de （Institute of Karst Geology, CAGS / Key Laboratory of Karst Collapse Prevention, CAGS, Guilin,GuangJi 541004, China）
karst collapse, monitoring of water and gas, drainage of karst water filling mine, Meitanba
Meitanba Coal Mine, Hunan Province, is one of the coal mines famous for karst water flooding in China. Its current mining level is about 400 m and the quantity of pumped water from the mine is about 11 000 ma per hour. For long, due to the continuous mine water drainage a great groundwater depression cone with an area of 219.19 km2 has been formed. Generally, most sinkholes induced by the mine drainage mainly occur in three stages, which include drainage beginning, groundwater level dropping beneath the bed rock surface and the occurrence of water inrush incidents, so sinkholes would not be appeared in dewatering zone. But more and more sinkholes have formed in recent years, even though the authorities have taken a se- ries of countermeasures to control
ISSN:1001-4810
DOI:10.11932/karst20160207