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采动影响区地面瓦斯抽采钻井的变形破坏影响因素众多,导致钻井的破坏规律非常复杂。为了对各影响因素进行有效控制,从而使得地面钻井的抽采效能能够得到最大程度的发挥,对地质条件和回采工艺等多种影响因素的影响效应进行了深入分析,获得了采场尺寸、顶板管理方法、煤岩层倾角和断层等各主要因素的变化对地面钻井变形破坏的影响规律:地面钻井应优先布置在远离断层、陷落柱等地质构造的区域,当回采工作面通过地面钻井位置附近时应快速通过,应加强顶板管理减弱采场覆岩的移动,倾斜煤岩层条件下地面钻井井位应向采场中部偏移一定距离等。
There are many influencing factors on the deformation and failure of gas drainage drilling in the mining affected area, resulting in the complicated destruction of drilling. In order to effectively control all the influencing factors, the drilling efficiency of surface drilling can be maximized, the influence of various factors such as geological conditions and mining technology are deeply analyzed, and the influence of stope size, roof Management methods, changes in coal seam dip and faults on the deformation and failure of surface drilling: ground drilling should be preferentially arranged in areas away from the geological structures such as faults and collapsed columns. When the working face passes near the surface drilling position Should be passed quickly, the roof management should be strengthened to reduce the movement of overburden stope. The ground drilling well position should be offset a certain distance to the middle of the stope under the condition of inclined coal bed.