Sectional composite coal digging method for ground horizontal well
A technology for horizontal wells and horizontal sections, which is used in surface mining, earth-moving drilling, underground mining, etc., can solve the problems of poor construction conditions, large construction workload, and limited underground space in rock tunnelling.
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[0039] The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:
[0040] see Figure 1-Figure 6 , shows a method for stripping pressure relief and outburst elimination of surface horizontal well segmental water / aerodynamic combined coal dredging of the present invention, which is used for striping pressure relief and outburst elimination in broken soft and strong outburst coal seams.
[0041] The method for segmental water / aerodynamic combined coal-drawing strip pressure relief and outburst elimination in a surface horizontal well includes the following steps:
[0042] Step 1: Deploy the L-shaped horizontal well 2 on the ground along the downdip direction of the coal seam 8 roadway, and the horizontal section is located at the bottom of the coal seam 8 (see figure 1 );
[0043] The L-shaped horizontal well 2 is arranged along the down-dipping direction of the coal seam 8 roadway according to the layout direction of ...
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Abstract
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