煤层底板岩溶水突水危险性分层评价方法研究

Study on risk stratification evaluation method of karst water inrush in coal seam floor

山西新元煤炭有限责任公司属华北石炭二叠系煤田,主要可采煤层为3、9、15号煤,大部分区域均属奥灰水带压开采区。以往勘探和采掘活动揭示,井田内奥陶系峰峰组和马家沟组具有不同的水位和富水性特征,局部存在太原组灰岩的富水异常区,均不同程度的威胁矿井的安全。显然,依据突水系数法进行笼统的评价并不能客观的反映各层对煤层的影响程度,本文以新元井田9号煤层为例,探讨煤层底板岩溶水突水危险性的分层评价方法,为矿井防治水工作提供更可靠的依据。

Shanxi Xinyuan Coal Corporation Ltd.is a permo-carboniferous coal field in north China,the main coal seams are 3,9,15 coal,most of the areas are ordovician water pressure mining area.Previous exploration and excavation activities have revealed that the Fengfeng and Majiagou formations of the ordovician system in well-field system have different water level and water-rich characteristics,and there are local water-rich abnormal areas of the limestone of the Taiyuan formation,which threaten the safety of the mine to varying degrees.Obviously,the general evaluation based on the water inrush coefficient method can not objectively reflect the influence degree of each layer on the coal seam.This paper takes the No.9 Coal Seam in new well-field system as an example to discuss the risk evaluation method of karst water inrush in the coal seam floor It provides a more reliable basis for mine water control work.