唐山矿岳胥区奥灰水带压开采危险性评价

Water inrush risk evaluation of mining under pressure of Ordovician limestone water in Yuexu district in Tangshan mine

基于唐山矿岳胥区奥灰岩发育特征和水文地质特征，结合安全水头、突水系数、安全隔水层厚度等3个不同指标，对研究区带压开采危险性进行了评价。结果显示：研究区奥陶纪灰岩埋深整体呈北深南浅，且存在一定范围的压煤带，井田内奥灰水水位呈北高南低的趋势，研究区内奥灰水位最高，水位标高–10~–9 m；掘进巷道安全水头值及安全隔水层厚度评价结果显示无带压开采危险，突水系数评价结果则显示研究区存在范围不等的带压开采危险区，突水危险区主要存在于研究区两侧扩大区，应注意开展奥灰水防治工作。

According to the development and hydrogeology characteristics of Ordovician limestone in Tangshan mine, this paper evaluated the safety of mining under pressure in the study area in combination with secure hy-draulic head, water bursting coefficient and thickness of safety layers. The results showed that Ordovician lime-stone water level in minefield increased in order from north to south with a small hydraulic slope, the level in study area is the highest and water level elevation is–10 ~ –9 m. The safety hydraulic head value and thickness of safety layers in excavation roadway showed that there were no danger for mining under pressure. The water inrush coeffi-cient showed that there was danger during mining under pressure in the study area at different degree. Attention should be payed to prevent the danger during mining under pressure in some areas while mining 14th coal seam.