定向水平井封堵薄灰残余出水点技术研究与实践

针对牛儿庄矿56603工作面大青灰岩残余出水点确切位置不定且较分散、井下封堵不具备施工条件以及地面立井封堵探查效率低、工程量大的难点,提出采用地面定向水平井技术进行探查封堵并成功实施,堵水率100%。实践表明,应用地面定向水平井技术对薄层灰岩出水点进行探查封堵,提高了钻孔对薄层灰岩内导水裂隙、断层等导水通道的探查效率,解决了过去立井堵水对导水通道探查效率低、工程量大的问题;通过对揭露的薄层灰岩导水通道进行注浆封堵,能够实现对残余出水点的截流堵源,从而实现对薄层灰岩残余出水点的有效封堵。

Research and practice of sealing thin ash residual outflow point technology in directional horizontal shaft

Aiming at the difficulties of the uncertain and scattered exact location of the residual water outlet point of the Daqing limestone at 56603 working face and the low efficiency and large volume of work for surface vertical well plugging in Niu'erzhuang Mine,the ground directional horizontal well technology was proposed to investigate and successfully implemented,with a plugging rate of 100%.Practice showed that the application of ground directional horizontal shaft technology was adopted to investigate and seal the water outlet point of thin-layered tuff,which improved the efficiency of drilling to investigate water-conducting fissures,faults and other water-conducting channels in thin-layered tuff,solving the problems of low efficiency and large volume of work for water-conducting channel by vertical well plugging in the past;through grouting and plugging the exposed thin limestone water diversion channel,it can achieve the goal of improving the exploration efficiency of the thin-layer limestone water diversion channel.The effective plugging of thin limestone residual water point can block the residual water outlet of thin limestone.