厚及特厚煤层综放面浅孔卸压综合抽放技术

鹤煤六矿主采的二₁煤层为典型的低透气性厚及特厚煤层。该矿回采面因受多期构造影响，煤质松软致密，透气性差，尤其在全层综放面回采时，瓦斯问题更是制约着安全回采。为有效解决这一难题，提高安全回采效率，对低透气性厚及特厚煤层全层综放面浅孔卸压综合抽放技术进行了研究，通过在2123综放工作面2年的回采实践，有效地消除了回采期间瓦斯隐患，改善了工作面回采条件，确保了矿井的安全生产。

Short boreholes-pressure relief drainage technology in fully-mechanized caving face of thick and special thick coal seam

The Ⅱ₁ coal seam was the typical low permeability and special thick coal seam in Hebi No.6 Coal Mine.Owing to multi-stage tectonic movement，it led to soft coal and poor permeability.Especially in fully-mechanized caving face，the problem of gas was more restrictive to safety production.In order to solve this problem effectively，this paper has carried out the research on the short boreholes-pressure relief drainage technology in fully-mechanized caving working face of thick and special thick coal seam.Through the production practice for two years in the 2123 fully-mechanized coal caving face，the hidden danger of gas was effectively eliminated.The successful application of this technology not only greatly improve the production conditions of the working face，but also ensure the safety guarantee.