A method for preventing and controlling water and sand inrush in coal mining
A technology of coal mining and sand breaking, applied in mining equipment, earth-moving drilling, mining equipment, etc., can solve the problems of loss, poor safety, huge treatment cost, etc., to reduce suddenness, simple implementation, and good safety. Effect
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[0023] The present invention will be described in detail below in conjunction with specific embodiments.
[0024] A mine needs to mine the No. 2 coal seam. The No. 2 coal seam of the 2203 coal mining face is covered with rocks, cohesive soil and sand. When the No. 2 coal seam is mined due to the limited thickness of the rock, water and sand inrush accidents are prone to occur. In order to prevent sudden For the occurrence of water and sand intrusion accidents, refer to figure 1 , take the following steps to prevent and control coal mining water and sand inrush accidents:
[0025] Step 1: Obtain various geological parameters before coal mining. Obtain the coal seam thickness m from the histogram of the borehole 1 is 3 meters, and the thickness of the rock covered above the coal seam is m 2 is 18 meters, and the thickness of the cohesive soil covered on the rock is m 3 is 60-80 meters, and the thickness of the sand layer covered on the cohesive soil is m 4 It is 2 to 20 met...
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