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由于井底马头门工程量大、结构复杂、施工较困难,东滩矿井在地质条件较好的前提下,采用锚喷加金属网做临时支护,随井筒自上而下分层连续掘进(每侧3～4m)马头门,而后由下向上利用液压滑模随井筒一起整体连续浇灌混凝土。这种施工方法能充分利用立井施工设备、减少工序转换时间、加快施工速度,且井筒与马头门的整体性好。利用滑模砌筑马头门需解决好防止支承杆弯曲、防止模板产生椭圆变形和马头门部位模板的稳放等问题。这些问题关系着施工速度和施工质量,甚而能影响滑模砌筑马头门的成败。自1981年11月起,相继在东滩北风井、主井、副井和西风井成功地利用滑模砌筑马头门,且工程质量优良。下面仅就其施工中的几个技术问题简介如下。
Due to the large amount of engineering, complex structure and difficult construction, Matang Gate at the bottom of the mine is under the premise of better geological conditions, using anchor spray and metal mesh for temporary support, continuous downhole boring with the wellbore (3 ~ 4m on each side) of Ma Tau Mun, and then from the bottom up using the hydraulic slide along with the whole well continuous irrigation of concrete. This construction method can make full use of shaft construction equipment, reduce the process of conversion time, speed up the construction speed, and the integrity of wellbore and Ma Tau door. The use of sliding masonry masonry need to be solved to prevent bending the support rod to prevent the template elliptical deformation and the stability of the horse head door template and other issues. These problems are related to the construction speed and construction quality, and can even affect the success or failure of sliding mode masonry Ma Tau Mun. Since November 1981, the succession of sliding mode masonry Ma Tau Mun has been successfully applied in the Dongfeng Beifeng Well, the main shaft, the auxiliary shaft and the Xifeng Well, and the construction quality is excellent. The following is a brief introduction of several technical problems in their construction.