朔州矿区岩溶承压构造水超前探放技术

为了预防矿井巷道掘进前方构造导通承压水而造成突水事故,在朔州国强煤矿采用瞬变电磁法“五横一纵”探测试验方案超前探测突水构造,分析剖面图、平面图及立体图,精确圈定导水通道及富水区位置,确定水害类型及关联性,在此基础上进行超前钻探探放水设计,提出岩溶承压突水构造超前探放措施。结果表明：矿井瞬变电磁法可以实现巷道掘进前方富水构造全方位覆盖探测,根据全方位数据形成三维立体图,以此分析富水区分布及联通情况,推断国强煤矿掘进迎头前方可能存在断层或陷落柱等地质构造,且与砂岩、灰岩等含水层联通形成岩溶承压构造富水区|针对高承压岩溶区水压大、水量足的特点,钻探探放水设计采取 “15横9纵”的加密钻孔布置方式,在孔口安装止水套管、闸阀、水压表、水门、三通、泄水短管及防喷逆止阀等安全装置,才能进行安全探放水工作,并及时进行安全分析,采取相应的安全措施,保证工作面的安全采掘。

Advanced exploration technology karst pressure-bearing structural water in Shuozhou mining area

In order to prevent the water inrush accident caused by the forward structure of the confined water during the excavation process, the transient electromagnetic method "five-horizontal and one vertical" detection test plan was adopted in the Shuozhou Guoqiang coal mine to carry out the advanced detection of the water inrush structure. The profile, plan and perspective view accurately define the position of the water guiding channel and the water-rich zone, analyze the type and correlation of water damage, and carry out the design of the advanced exploration and drainage water on the basis of this, and propose the advanced exploration and release measures of the karst pressure-bearing water inrush structure. The results show that the transient electromagnetic method can cover the structure and water-rich conditions in the front of the excavation, form a three-dimensional map of multi-directional data, analyze the water-rich distribution and connectivity, and conclude that there may be faults or subsidence pillars in front of the heading of Guoqiang coal mine. Structure, connecting aquifers such as sandstone and limestone to form a water-rich zone; In view of the characteristics of high water pressure and sufficient water volume in the high-pressure karst area, on the basis of advanced detection, special drilling technology schemes, such as encrypted drilling arrangement and orifice safety device layout, can be developed for the front water-rich area. Water release work and timely safety analysis; During the process of exploration and release of water, when drilling signs are found, drilling must be stopped immediately, and the drill pipe must not be pulled out. If necessary, grouting should be used to block the water guiding structure or leave a waterproof coal pillar to ensure safe mining of the working face.