Method for controlling roadway floor heave and floor rock burst by using parallel-row pile foundations

• Main Authors: WANG SHUWEN, XIA YONGXUE, QIN ZIHAN, PAN JUNFENG, LIU SHAOHONG
• Format: Patent
• Language: Chinese; English
• Published: 06.11.2018
• Subjects: EARTH DRILLING; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; GALLERIES; HYDRAULIC ENGINEERING; LARGE UNDERGROUND CHAMBERS; MINING; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS; SHAFTS; SOIL SHIFTING; TUNNELS; UNDERGROUND OR UNDERWATER STRUCTURES

The invention discloses a method for controlling roadway floor heave and floor rock burst by using parallel-row pile foundations. The method comprises the steps that (a) large-diameter drill holes areconstructed from two bottom angles of a roadway to a bottom plate in accordance with a pitching angle alpha and arranged at certain-distance intervals in the strike direction of the roadway; (b) a high-strength grouting pile is laid in each large-diameter drill hole; and (c) concrete grout is poured into each high-strength grouting pile as well as gaps between the high-strength grouting piles andthe large-diameter drill holes, and thus the parallel-row pile foundations are formed. According to the method for controlling the roadway floor heave and the floor rock burst by using the parallel-row pile foundations, the roadway floor heave and the floor rock burst can be controlled effectively. 种利用联排桩基治理巷道底鼓和底板冲击地压的方法，包括(a)在巷道两底角向底板按俯角α施工大直径钻孔，沿巷道走向按定间隔距离排列，(b)在每个大直径钻孔内铺设根高强度注浆桩，(c)将混凝土浆液注入每个高强度注浆桩及高强度注浆桩和大直径钻孔之间的间隙，由