新疆大南湖七号煤矿顶板突水危险性评价与防治
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摘要
为确保大南湖七号矿井安全采掘,基于地质及水文资料、钻孔数据和瞬变电磁勘探成果,对矿井含水层发育特征、富水性、顶板隔水层及导水裂缝带发育特征展开研究,并综合考虑上部含水层及老空水的影响,评价首采区10煤顶板突水危险性,提出相应防范措施。研究表明:10煤开采直接充水含水层为7煤~10煤间含水层,厚度0~62.3 m,自N向S逐渐减小。瞬变电磁勘探划定5处相对富水区,位于首采区西北部及南部边界区域。首采区北部10煤顶板隔水层隔水性能较好,南部较差。10煤开采导水裂缝带高度19.47~29.98 m,自SW向NE逐渐增大。10煤顶板突水危险性评价表明首采区南部受7煤老空水威胁严重,西部及北部局部区域受直接充水含水层的强富水性威胁,需提前开展针对性探水、防水工作。
In order to ensure the safe excavation, the characteristics of aquifer development, water abundance, roof aquiclude and water conducted fractured zone were studied based on the geological and hydrological data, borehole data, and transient electromagnetic prospecting results in Dananhu No.7 coal mine. Considered the influence of the upper aquifer and gob water comprehensively, we evaluate the risk of water inrush in No.10 coal and propose preventive measures in the first mining area. The research shows that the direct water-filled aquifer of No.10 coal mining is No.7 to No.10 coal aquifers which thickness is 0~62.3 m decreasing N to S. Transient electromagnetic survey delineated five relatively water-rich areas located in the northwestern and southern border areas of the first mining area. The roof aquiclude possesses better water resistant capacity in the north than whose in the south. During the No.10 coal mining, the height of the water conducted fractured zone is 19.47 to 29.98 m, which increases gradually from SW to NE. According to the risk evaluation of roof water inrush in No.10 coal mining, it is seriously threatened by the goaf water of 7#coal in the southern first mining area, while the strong water-richness of direct water-filled aquifer in the western and northern parts. Therefore, some relevant measures of water detection and waterproofing should be taken in advance.
In order to ensure the safe excavation, the characteristics of aquifer development, water abundance, roof aquiclude and water conducted fractured zone were studied based on the geological and hydrological data, borehole data, and transient electromagnetic prospecting results in Dananhu No.7 coal mine. Considered the influence of the upper aquifer and gob water comprehensively, we evaluate the risk of water inrush in No.10 coal and propose preventive measures in the first mining area. The research shows that the direct water-filled aquifer of No.10 coal mining is No.7 to No.10 coal aquifers which thickness is 0~62.3 m decreasing N to S. Transient electromagnetic survey delineated five relatively water-rich areas located in the northwestern and southern border areas of the first mining area. The roof aquiclude possesses better water resistant capacity in the north than whose in the south. During the No.10 coal mining, the height of the water conducted fractured zone is 19.47 to 29.98 m, which increases gradually from SW to NE. According to the risk evaluation of roof water inrush in No.10 coal mining, it is seriously threatened by the goaf water of 7#coal in the southern first mining area, while the strong water-richness of direct water-filled aquifer in the western and northern parts. Therefore, some relevant measures of water detection and waterproofing should be taken in advance.
引文
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[3]张杰,杨涛,王斌,等.浅埋煤层沟谷径流下开采顶板突水预测分析[J].采矿与安全工程学报,2017,34(5):868-875.
[4]许家林,朱卫兵,王晓振.基于关键层位置的导水裂隙带高度预计方法[J].煤炭学报,2012,37(5):762.
[5]李晶,庄新国,周继兵,等.新疆准东煤田西山窑组巨厚煤层煤相特征及水进水退含煤旋回的判别[J].吉林大学学报(地球科学版),2012,42(S2):104-114.
[6]高喜才,伍永平.富水覆岩特厚煤层开采突水危险性与防控技术[J].煤矿安全,2014,45(1):54-56.
[7]韩自强,罗姣,刘涛,等.定源回线瞬变电磁法在煤矿富水区调查中的应用[J].地球物理学进展,2015(4):1705-1711.
[8]苏松,李晓斌.煤矿富水区瞬变电磁法精细勘查[J].煤矿安全,2013,44(12):138-140.
[9]孟召平,易武,兰华,等.开滦范各庄井田突水特征及煤层底板突水地质条件分析[J].岩石力学与工程学报,2009,28(2):228-237.
[10]冯光俊,李伍,张泳,等.林西矿深部水平奥灰水带压开采突水危险性评价[J].中国煤炭,2015(8):41.
[11]孙魁,王英,李成,等.巨厚煤层顶板离层水致灾机理研究[J].河南理工大学学报(自然科学版),2018,37(2):14-21.