摘要
针对兖州煤田下组煤深部开采受奥灰高承压水威胁以及当地大型煤化工企业生产用水量大的现状,在已进行的水文地质勘探及放水试验基础上,评价奥灰富水性,并采用有限差分法进行奥灰疏水降压数值模拟研究,提出水煤共采观点。研究结果表明:兖州煤田深部奥灰水压高,合理布置水煤共采孔,可以实现奥灰水位的有效疏降,疏降中心区水位最大降深可达110 m,突水系数显著下降,提高了下组煤开采的安全性;同时可提供煤化工43200 m3/d的供水量,能达到可持续的、水资源保护性的供水效果,实现下组煤的水煤共采。
At Present,a large high-pressure water from Ordovician limestone has threaten deep mining of the lower group coal in Yanzhou Coal,and local large-scale coal chemical enterprises have some difficulties to meet their water need for production. To address this problem,water yield property of Ordovician limestone has been studied on the basis of hydrogeological exploration and draining test which has been done. Finite-difference method is been used to simulate drainage and pressure lowering of Ordovician limestone aquifer. And finally,a proposal on water and coal co-exploitation is put forward. The results show that： a high water pressure of deep Ordovician limestone in Yanzhou Coal can be pumped down effectively by a rational arrangement of boreholes. The maximum drawdown in the central area of Ordovician limestone aquifer can be up to 110 m,and water inrush coefficient decreased significantly,which improves the safety for mining lower group coal. And at the same time,water supply for coal chemical enterprises with 43200m3/ d can be satisfied,and groundwater resources can be achieved to a sustainable exploitation,which finally achieve water and coal co-exploitation of lower group coal.
出处
《地质论评》
CAS
CSCD
北大核心
2015年第4期835-842,共8页
Geological Review
基金
国家自然科学基金重点项目(编号41430643)资助成果
关键词
水煤共采
深部开采
奥灰疏降
数值模拟
矿井水资源化
water and coal co-exploitation
deep mining
dewatering of Ordovician limestone
numerical simulation
reclamation of mine water
