一种动压采区大巷复合护巷方法

• Format: Patent
• Language: Chinese
• Published: 09.02.2024
• Subjects: AMMUNITION; BLASTING; EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; HEATING; LARGE UNDERGROUND CHAMBERS; LIGHTING; MECHANICAL ENGINEERING; MINING; MINING OR QUARRYING; SHAFTS; TUNNELS; WEAPONS

发明提供一种动压采区大巷复合护巷方法，包括如下步骤，1、在靠近上一采区采空侧的新采区回风大巷掘出之后，并实施锚网索联合支护，自回风大巷顶板斜向上布置一排定向切顶卸压钻孔；在定向切顶卸压钻孔内实施定向聚能爆破技术切断老顶，3、自采区大巷两帮中上部斜向上分别布置两组顶帮连接杆，保证顶板与两帮的整体性，4、向巷道表面喷射水泥浆，增强支护系统的整体性，5、向巷道围岩实施长短孔注水泥浆技术，保证巷道的稳定性。有效降低采区大巷服务期间的巷道变形量，保证巷道通风、运输、行人等生产过程的顺畅。 The invention provides a method for compound main roadway protection in a dynamic pressure mining area. The method comprises the following steps: 1, after excavation of a return air main roadway in anew mining area close to a goaf side of a previous mining area, implementing anchor net and cable combined support and obliquely forming a row of directional roof cutting pressure relief holes upwardsfrom a return air main roadway roof; 2, implementing a directional shaped charge blasting technology to cut off the roof in the directional roof cutting pressure relief holes; 3, obliquely and respectively arranging two groups of top side connecting rods at the middle upper parts of two sides of the main roadway in the mining area upwards to ensure the integrity of the roof and th