摘要
烧变岩含水层是榆神矿区东部浅埋煤层开采的主要水害威胁。通过分析地质勘探和井巷工程揭露资料,揭示了烧变岩含水层富水性受裂隙孔隙发育情况和补径排条件控制、顺层富水性不均一的典型特征,提出基于含水层空间结构和积水情况的'综合探查、以防为主、分区防治'的烧变岩水害防治技术。应用物探、钻探等综合探查手段查明烧变岩微裂隙孔隙弱含水区和孔洞裂隙积水区的范围,对烧变岩微裂隙孔隙弱含水区,仅需留设维持巷道稳定的窄小护帮煤柱;对烧变岩孔洞裂隙积水区,提出砌筑防水闸墙和留设防隔水煤柱方案。在留设10 m切眼护帮煤柱和43 m防隔水煤柱后,榆神一期规划区某矿2301大采高工作面实现了烧变岩含水层水资源保护基础上的安全开采。
The burnt rock aquifer is the main water hazard for shallow coal seam mining in eastern Yushen Mining Area.The typical characteristic of burnt rock aquifer was revealed by analyzing geological exploration data and roadway engineering disclosure information,with the conclusion that water abundance was decided by pore and fracture features,groundwater recharge,runoff and discharge conditions,and horizontal heterogeneity.The water hazard control technology that summarized as'comprehensive exploration,prevention first,partition treatment'was proposed based on the spatial structure and hydrops conditions of burnt rock aquifer.With the comprehensive exploration methods like geophysical prospecting,drilling,the weakly aquiferous areas with micro-fissures and pores,also the richly aquiferous areas with cavity and fissures can be detected in burnt rock aquifer.Aiming at the weakly aquiferous areas,only a small pillar is needed to protect working slopes;considering the richly aquiferous areas,the scheme that building water proof sluice-wall and setting coal and rock waterproof pillar is suggested.The2301 thick seam workface in a mine in Yushen Mining Area phaseⅠ,which was subjected to the water hazards of burnt rock aquifer,achieved its safe mining and water-preserved mining by setting a 10 m cut-off coal pillar and a 43 m water-proof pillar to protect working slopes.
作者
宋业杰
甘志超
SONG Yejie;GAN Zhichao(Mining Research Branch of China Coal Research Institute,Beijing 100013,China;Coal Mining&Designing Department,Tiandi Science&Technology Co.,Ltd,Beijing 100013,China)
出处
《煤矿安全》
CAS
北大核心
2019年第8期92-96,99,共6页
Safety in Coal Mines
基金
国家自然科学基金青年科学基金资助项目(51704161)
中国煤炭科工集团科技创新面上基金资助项目(2018-TD-MS025)
关键词
烧变岩
水害防治
榆神矿区
综合探查
分区防治
burnt rock
water hazard control
Yushen Mining Area
comprehensive exploration
partition treatment
