Top and bottom plate cooperative water inrush prevention method under composite limestone top plate condition

• Main Authors: CHEN XUGANG, ZHANG YONG, LI FUQING, WANG HUAWEI, LIU PEIYUE, JIA DONGXIU, LI TINGCHUN, LIU LEI, LIU YUYUE, WANG DONGJING, BAI DONGDONG, ZHANG GUANGSHENG, LIU QINQUAN, GUO HONGYUN
• Format: Patent
• Language: Chinese; English
• Published: 10.05.2024
• Subjects: AMMUNITION; BLASTING; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; MINING; MINING OR QUARRYING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; WEAPONS

The invention relates to the technical field of coal mining, in particular to a top and bottom plate cooperative water inrush prevention method under the condition of a composite limestone top plate, which comprises the following steps: S1, after top cutting is completed, peeping a cut joint between blast holes after blasting; s2, judgment is conducted according to the cut joint penetration degree peeped in the step S1, and top cutting holes are formed in the areas where the blast holes which do not reach the standard value are located in a supplementary mode; s3, peeping analysis is carried out on the caving effect in the roof cutting area, and forced release holes are formed in a supplementary mode according to the caving effect; and S4, the step S1, the step S2 and the step S3 are repeated until pushing and mining are completed, and finally the top plate collapses to re-press the bottom plate. By means of the method, the hard composite limestone top plate can collapse to re-press the bottom plate, and the