Large-diameter cobble and boulder splitting and crushing method of shield heavy tearing knife

Abstract

The invention discloses a large-diameter cobble and boulder splitting and crushing method of a shield heavy tearing knife. The large-diameter cobble and boulder splitting and crushing method of the shield heavy tearing knife includes the following steps that the heavy tearing knife is arranged on a panel and a spoke of a shield cutter head; 2 the heavy tearing knife is rotated to penetrate into large-diameter cobbles and boulders so as to enable the large-diameter cobbles and boulders to generate penetration deformation; 3 the heavy tearing knife penetrating into the large-diameter cobbles and boulders forms compaction cores in the internal regions of the large-diameter cobbles and boulders; the heavy tearing knife squeezes the large-diameter cobbles and boulders and expands cracks of the large-diameter cobbles and boulders; 5 the large-diameter cobbles and boulders are crushed under the effect of the cracks and the penetration effect of the heavy tearing knife. The composite stratum rich in ultra-large-diameter cobble and boulder is excavated through the hammering and splitting effects of the heavy tearing knife, and the problem that at present, the shield excavation efficiency of the stratum rich in ultra-large-diameter cobble and boulder is low is solved.

Description

technical field [0001] The invention relates to the technical field of splitting and crushing pebble boulders with large particle diameters, in particular to a method for splitting and crushing pebble boulders with large particle diameters by a shield heavy-duty tearing knife. Background technique [0002] The formation rich in ultra-large-sized boulders is looser than the hard-rock formation, and it is difficult for the formation to provide support to keep large-sized pebbles and boulders in a stable state. [0003] Using a shield cutter head equipped with a single disc hob for rock breaking will make it difficult for a shield cutter head equipped with a single disc hob to achieve rolling rock breaking, and the hob ring rotates in pebble and boulder formations It is difficult to start, and it is easy to cause the partial wear of the hob to fail. [0004] It is difficult for the cutter to break the pebbles and boulders due to the high strength of ordinary soft soil cutters,...

AI Technical Summary

Problems solved by technology

[0003] Using a shield cutter head equipped with a single disc hob for rock breaking will make it difficult for a shield cutter head equipped with a single disc hob to achieve rolling rock breaking, and the hob ring rotates in pebble and boulder formations It is difficult to start, and it is easy to cause the partial wear of the hob to fail

[0004] Common soft soil cutters are used to cut and break rocks. Due to the high strength of pebbles and boulders, it is difficult for the cutter to break them, and it is easy to cause the cutter to break and fail.

Images