Corner cutting destroying method of remaining coal pillars
The invention belongs to the field of coal mining, and discloses a corner cutting destroying method of remaining coal pillars. The corner cutting destroying method comprises the following steps: S1, the reserving shape and size of the remaining coal pillars, the vertical distance between bottom plat...
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| creator | WANG GUIZHOU FENG GUORUI CHENG HAOJIE KANG LIXUN ZHANG YUJIANG YUAN HONGHUI BAI SHIMIN LIU HUI LIU XIFENG DU CAIYI |
| description | The invention belongs to the field of coal mining, and discloses a corner cutting destroying method of remaining coal pillars. The corner cutting destroying method comprises the following steps: S1, the reserving shape and size of the remaining coal pillars, the vertical distance between bottom plates of the remaining coal pillars and top plates of lower coal seams, and the distance between the centroid of the remaining coal pillars and the centroid of mining roadways of the lower coal seams are additionally explored and measured; S2, positions of cutting bottom corner drill holes and cuttingtop corner drill holes are determined, and the angle and length of the cutting bottom corner drill holes and the cutting top corner drill holes are calculated; and S3, according to calculating results, in the mining roadways of the lower coal seams, the cutting bottom corner drill holes and the cutting top corner drill holes are drilled, and after the drill holes reach the remaining coal pillars,shape cutting is conducted |
| format | Patent |
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The corner cutting destroying method comprises the following steps: S1, the reserving shape and size of the remaining coal pillars, the vertical distance between bottom plates of the remaining coal pillars and top plates of lower coal seams, and the distance between the centroid of the remaining coal pillars and the centroid of mining roadways of the lower coal seams are additionally explored and measured; S2, positions of cutting bottom corner drill holes and cuttingtop corner drill holes are determined, and the angle and length of the cutting bottom corner drill holes and the cutting top corner drill holes are calculated; and S3, according to calculating results, in the mining roadways of the lower coal seams, the cutting bottom corner drill holes and the cutting top corner drill holes are drilled, and after the drill holes reach the remaining coal pillars,shape cutting is conducted</abstract><oa>free_for_read</oa></addata></record> |
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| title | Corner cutting destroying method of remaining coal pillars |
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