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发明公开
CN110714763A 特厚煤层采煤工作面水力致裂采煤方法 无效 - 驳回

特厚煤层采煤工作面水力致裂采煤方法
摘要：
本发明公开了一种特厚煤层采煤工作面水力致裂采煤方法，该特厚煤层采煤工作面水力致裂采煤方法包括以下步骤：先沿着采煤工作面的长度方向，在采煤工作面中向上方煤体中钻取一排水力致裂孔，水力致裂孔包括交错布置的浅孔和深孔，然后在各水力致裂孔底部安装注水封孔器，并对各水力致裂孔进行高压注水，使采煤工作面中上方的煤体破碎、垮落。该特厚煤层采煤工作面水力致裂采煤方法中的水力致裂孔采用高低交错布置，能够在不同深度层位进行水力致裂，顶煤致裂较为充分，避免水力致裂盲区，减小顶煤冒落块度；在采煤工作面内竖向打孔施工简单、方便，且钻孔内的注水封孔器不容易卡堵，在重力作用下回收较为容易。
摘要（英）：

The invention discloses a super-high seam coal face hydraulic fracturing coal mining method. The super-high seam coal face hydraulic fracturing coal mining method includes the following steps of drilling a row of hydraulic fracturing holes in a coal body above a coal face in the length direction of the coal face, wherein the hydraulic fracturing holes include shallow holes and deep holes in a staggered mode; installing a water injecting and hole sealing device at the bottom of each hydraulic fracturing hole, and performing high-pressure water injecting on each hydraulic fracturing hole so thatthe coal body above the coal face can be crushed and caved. The hydraulic fracturing holes in the super-high seam coal face hydraulic fracturing coal mining method are distributed in the high-low staggered mode, hydraulic fracturing can be carried out on different depth layers, top coal fracturing is sufficient, hydraulic fracturing blind areas are avoided, and the top coal caving lumpiness is reduced; construction is simple and convenient when holes are vertically formed in the coal face, the water injecting and hole sealing devices in the drilled holes are not prone to blockage, and recovery is easy under the effect of gravity.

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