摘要
为评价奥陶系岩溶水高水压下煤层突水危险性,寻求下组煤开采技术方案,在斜沟煤矿共施工10个水文地质钻孔,通过岩心鉴定、简易水文地质观测、抽水试验、水化学分析等试验进行了研究。研究表明：斜沟煤矿峰峰组上部地层裂隙发育程度差,钻探过程中钻井消耗液无增大异常情况,峰峰组单位涌水量较上马家沟组、峰峰组混合含水层单位涌水量低10-105倍,两者地下水化学成分不同,可说明斜沟煤矿峰峰组含水层富水性弱并且具有较好的阻水能力,可将30m厚度的峰峰组地层视为隔水层,井田13号煤层带压开采突水系数小于0.1MPa/m,理论上可以施行带压开采。
In order to evaluate a water inrush danger of seam under high water head pressure of Ordovician karat water and to seek mining technical pan of the seam in the low group,there were 10 hydrogeological holes drilled in Xiegou Mine and a study was conducted on the rock core identification, simple hydrogeological observation,water pumping tests, water chemical analysis and other test.The study showed that the crack development of the top stratum in Fengfeng Formation of Xiegou Mine was poor.During the drilling and exploration process, there was no high increasing abnormal conditions occurred in the drilling consumable liquid.The unit water inrush volume from Fengfeng Formation was 10- 105 times lower than the unit water inrush volume from the combined water bearing layer of Majiagou Formation and Fengfeng Formation.The chemical compositions of the underground water from the two formations were different and could showed that the aquifer in Fengfeng Formation would be less watery and could have good water resistance capacity.The stratum thickness of Fengfeng Formation with a thickness of 30 meters would be considered as a water insulation layer.A pressurized mining in No. 13 seam of the minefield would have a water inrush coefficient less than 0.1 MPa./m and a pressurized mining could be conducted theoretically.
出处
《煤炭科学技术》
CAS
北大核心
2015年第10期67-71,共5页
Coal Science and Technology
关键词
峰峰组
隔水层
岩溶裂隙
带压开采
Fengfeng Formation
water isolated layer
karst crack
pressurized mining
