摘要
为了确定朱庄井田太灰上段各单层灰岩的富水性类型,认识该井田太灰突水水源的规律性,通过对地面抽水试验、井下简易放水试验和井田水文地质资料的分析,研究表明:太灰上段L1灰岩溶裂隙不发育,富水性极弱,在单个工作面范围内可视作相对隔水层;L2灰岩岩溶裂隙发育一般,是具有较强富水性岩溶裂隙含水层;L3和L4灰岩,岩溶裂隙发育,富水性极强,并具有同一水力联系,是极强富水岩溶裂隙含水层,对6煤开采具有极大的危害性。研究发现突水系数法适合6煤回采工作面突水危险性预测评价,朱庄井田太灰上段含水层突水系数较大,但均在《矿井水文地质规程》要求范围内,其中3613,3614,3621等7个工作面突水系数超过临界值,通过采取了疏水降压、底板注浆改造等安全措施实现了安全开采。
In order to confirm the watery features of each limestone layer at the top section of Taiyuan Group limestone in Zhuzhuang Mine Field and to understand the water source law of the water inrush occurred from Taiyuan Group Limestone of the mine filed,the analysis on the surface water pumping test,the underground mine water drainage test and the mine field hydrological information showed that the fissures of the L1 limestone at the top section of the Taiyuan Group limestone was not developed and the watery was very poor.From a single coal mining face,L1 limestone could be taken as a water isolated layer.The karst fissures of the L2 limestone was generally developed and was an aquifer with a rich watery and karst fissures.The karst fissures of the L3 and L4 limestone were developed with rich watery and the unified hydraulic connection and were aquifers with very watery and karst fissures,which would have high dangers to the coal mining operation in No.6 Seam.The water inrush coefficient method was suitable to the evaluation on the water inrush danger prediction of the coal mining face in No.6 Seam.The study showed that the water inrush coefficient for the strata at the top section of the Taiyuan Group limestone in Zhuzhuang Mine Field would be high and would be within the required scope of the Mine Hydrological Regulation.The water inrush coefficients of seven coal mining faces as No.3613,3614,3621 and others would be over the critical value.Thus the water drainage,water pressure dropping,floor grouting reconstruction and other safety measure shall be taken in order to have a safety coal mining.
出处
《煤炭科学技术》
CAS
北大核心
2010年第8期118-121,62,共5页
Coal Science and Technology
关键词
太灰岩含水层
富水性特征
简易放水试验
抽水试验
突水系数
Taiyuan Group limestone aquifer
watery features
simple water drainage test
water pumping test
water inrush coefficient
